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Merge pull request #12 from rust-console/lokathor
Talkin' about tile data
This commit is contained in:
Lokathor
GitHub
commit
29cc0015d5
18
.travis.yml
18
.travis.yml
|
|
@ -8,14 +8,26 @@ rust:
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|||
- nightly
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||||
|
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before_script:
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- rustup component add rust-src
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- (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
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- (test -x $HOME/.cargo/bin/mdbook || cargo install --vers "^0.1" mdbook)
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- (test -x $HOME/.cargo/bin/cargo-xbuild || cargo install cargo-xbuild)
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- (test -x $HOME/.cargo/bin/cargo-make || cargo install cargo-make)
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- (test -x $HOME/.cargo/bin/mdbook || cargo install mdbook)
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- cargo install-update -a
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script:
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- cargo check && cargo check --release
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# Only run a test build for the library itself
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# Obtain the devkitPro tools
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- wget https://github.com/devkitPro/pacman/releases/download/devkitpro-pacman-1.0.1/devkitpro-pacman.deb
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- sudo dpkg -i devkitpro-pacman.deb
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- sudo dkp-pacman -Sy
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- sudo dkp-pacman -Syu
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- sudo dkp-pacman -S -v --noconfirm gba-tools devkitARM
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- export PATH="$PATH:/opt/devkitpro/devkitARM/bin"
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- export PATH="$PATH:/opt/devkitpro/tools/bin"
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# Test the lib and then compile all examples with `cargo make`
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- cargo test --lib && cargo test --lib --release
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- cargo make
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# Test build the book so that a failed book build kills this run
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- cd book && mdbook build
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deploy:
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|
|
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@ -39,7 +39,7 @@ fn main() -> std::io::Result<()> {
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} else {
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path.set_extension("");
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let name = path.file_name().unwrap().to_str().unwrap();
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println!("{:?}", name);
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println!("{}", name);
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std::process::Command::new("arm-none-eabi-objcopy").args(
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&["-O", "binary",
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&format!("target/thumbv4-none-agb/release/examples/{}",name),
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@ -61,3 +61,6 @@ dependencies = ["build-examples-debug", "build-examples-release", "pack-roms"]
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[tasks.test]
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command = "cargo"
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args = ["test", "--lib"]
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[tasks.default]
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alias = "build"
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|
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@ -4,6 +4,7 @@
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[](https://docs.rs/gba/latest/gba/)
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* [](https://sagiegurari.github.io/cargo-make)
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* 
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# gba
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@ -16,7 +17,8 @@ detailed for you [in the 0th chapter of the
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book](https://rust-console.github.io/gba/ch00/index.html) that goes with this
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crate.
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## For a fast initialization start
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If you've done the global setup once before and just want to get a new project
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started quickly we got you covered:
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```sh
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curl https://raw.githubusercontent.com/rust-console/gba/master/init.sh -sSf | bash -s APP_NAME
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@ -15,8 +15,9 @@
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* [The VCount Register](ch02/the_vcount_register.md)
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* [light_cycle](ch02/light_cycle.md)
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* [Ch 3: Memory and Objects](ch03/index.md)
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* [GBA Memory](ch03/gba_memory.md)
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* [Tiled Backgrounds](ch03/tiled_backgrounds.md)
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* [GBA Memory Mapping](ch03/gba_memory_mapping.md)
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* [Tile Data](ch03/tile_data.md)
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* [Regular Backgrounds](ch03/regular_backgrounds.md)
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* [Object Basics](ch03/object_basics.md)
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* [GBA RNG](ch03/gba_rng.md)
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* [memory_game](ch03/memory_game.md)
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|
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@ -32,10 +32,11 @@ reason, you'll still want devkitpro for the `gbafix` utility.
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`C:\devkitpro\tools\bin` to be [added to your
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PATH](https://stackoverflow.com/q/44272416/455232), depending on where you
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installed it to and such.
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* On Linux you'll also want it to be added to your path, but if you're using
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Linux I'll just assume you know how to do all that. I'm told that the default
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installation path is `/opt/devkitpro/devkitARM/bin`, so look there first if
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you didn't select some other place.
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* On Linux you can use pacman to get it, and the default install puts the stuff
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in `/opt/devkitpro/devkitARM/bin` and `/opt/devkitpro/tools/bin`. If you need
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help you can look in our repository's
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[.travis.yml](https://github.com/rust-console/gba/blob/master/.travis.yml)
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file to see exactly what our CI does.
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Finally, you'll need `cargo-xbuild`. Just run `cargo install cargo-xbuild` and
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cargo will figure it all out for you.
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@ -1,19 +1,19 @@
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# GBA Memory
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# GBA Memory Mapping
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The [GBA Memory Map](http://problemkaputt.de/gbatek.htm#gbamemorymap) has
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several memory portions to it, each with their own little differences. Most of
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the memory has pre-determined use according to the hardware, but there is also
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space for games to use as a scratch pad in whatever way the game sees fit.
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The memory ranges listed here are _inclusive_, so they end with a lot of `F`s
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and `E`s.
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The memory ranges listed here are _inclusive_, so they end with a lot of F's
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and E's.
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We've talked about volatile memory before, but just as a reminder I'll say that
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all of the memory we'll talk about here should be accessed with volatile with
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all of the memory we'll talk about here should be accessed using volatile with
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two exceptions:
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1) Work RAM (both internal and external) can be used normally, and if the
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compiler is able to totally elide any reads and writes that's okay.
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compiler is able to totally elide some reads and writes that's okay.
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2) However, if you set aside any space in Work RAM where an interrupt will
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communicate with the main program then that specific location will have to
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keep using volatile access, since the compiler never knows when an interrupt
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@ -38,13 +38,11 @@ external work ram has only a 16-bit bus (if you read/write a 32-bit value it
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silently breaks it up into two 16-bit operations) and also 2 wait cycles (extra
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CPU cycles that you have to expend _per 16-bit bus use_).
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In other words, we should think of EWRAM as if it was "heap space" in a normal
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application. You can take the time to go store something within EWRAM, or to
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load it out of EWRAM, but you should always avoid doing a critical computation
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on values in EWRAM. It's a bit of a pain, but if you wanna be speedy and you
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have more than just one manipulation that you want to do, you should pull the
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value into a local variable, do all of your manipulations, and then push it back
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out at the end.
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It's most helpful to think of EWRAM as slower, distant memory, similar to the
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"heap" in a normal application. You can take the time to go store something
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within EWRAM, or to load it out of EWRAM, but if you've got several operations
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to do in a row and you're worried about time you should pull that value into
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local memory, work on your local copy, and then push it back out to EWRAM.
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## Internal Work RAM / IWRAM
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@ -54,11 +52,9 @@ This is a smaller pile of space, but it has a 32-bit bus and no wait.
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By default, `0x3007F00` to `0x3007FFF` is reserved for interrupt and BIOS use.
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The rest of it is totally up to you. The user's stack space starts at
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`0x3007F00` and proceeds _down_ from there. In other words, if you start your
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own customized IWRAM use at `0x3000000` and go up, eventually you might hit your
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stack. However, most reasonable uses won't actually cause a memory collision.
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It's just something you should know about if you're using a ton of stack or
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IWRAM and then get problems.
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`0x3007F00` and proceeds _down_ from there. For best results you should probably
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start at `0x3000000` and then go upwards. Under normal use it's unlikely that
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the two memory regions will crash into each other.
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## IO Registers
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@ -95,9 +91,9 @@ and then there's 256 entries for object palette data (starting at `0x5000200`).
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The GBA also has two modes for palette access: 8-bits-per-pixel (8bpp) and
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4-bits-per-pixel (4bpp).
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* In 8bpp mode an (8-bit) palette index value within a background or sprite
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* In 8bpp mode an 8-bit palette index value within a background or sprite
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simply indexes directly into the 256 slots for that type of thing.
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* In 4bpp mode a (4-bit) palette index value within a background or sprite
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* In 4bpp mode a 4-bit palette index value within a background or sprite
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specifies an index within a particular "palbank" (16 palette entries each),
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and then a _separate_ setting outside of the graphical data determines which
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palbank is to be used for that background or object (the screen entry data for
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@ -143,14 +139,16 @@ of things, but they're _interlaced_ with each other all the way through.
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Now, [GBATEK](http://problemkaputt.de/gbatek.htm#lcdobjoamattributes) and
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[CowByte](https://www.cs.rit.edu/~tjh8300/CowBite/CowBiteSpec.htm#OAM%20(sprites))
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doesn't quite give names to the two data types, though
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doesn't quite give names to the two data types here.
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[TONC](https://www.coranac.com/tonc/text/regobj.htm#sec-oam) calls them
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`OBJ_ATTR` and `OBJ_AFFINE`. We'll give them Rust names of course. In Rust terms
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their layout would look like this:
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`OBJ_ATTR` and `OBJ_AFFINE`, but we'll be giving them names fitting with the
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Rust naming convention. Just know that if you try to talk about it with others
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they might not be using the same names. In Rust terms their layout would look
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like this:
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```rust
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#[repr(C)]
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pub struct ObjectAttribute {
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pub struct ObjectAttributes {
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attr0: u16,
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attr1: u16,
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attr2: u16,
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@ -173,7 +171,7 @@ pub struct AffineMatrix {
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(Note: the `#[repr(C)]` part just means that Rust must lay out the data exactly
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in the order we specify, which otherwise it is not required to do).
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So, we've got 1024 bytes in OAM and each `ObjectAttribute` value is 8 bytes, so
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So, we've got 1024 bytes in OAM and each `ObjectAttributes` value is 8 bytes, so
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naturally we can support up to 128 objects.
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_At the same time_, we've got 1024 bytes in OAM and each `AffineMatrix` is 32
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@ -181,7 +179,7 @@ bytes, so we can have 32 of them.
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But, as I said, these things are all _interlaced_ with each other. See how
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there's "filler" fields in each struct? If we imagine the OAM as being just an
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array of one type or the other, indexes 0/1/2/3 of the `ObjectAttribute` array
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array of one type or the other, indexes 0/1/2/3 of the `ObjectAttributes` array
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would line up with index 0 of the `AffineMatrix` array. It's kinda weird, but
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that's just how it works. When we setup functions to read and write these values
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we'll have to be careful with how we do it. We probably _won't_ want to use
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@ -207,7 +205,8 @@ mirror that you choose to access the game pak through affects which wait state
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setting it uses (configured via IO register of course). Unfortunately, the
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details come down more to the game pak hardware that you load your game onto
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than anything else, so there's not much I can say right here. We'll eventually
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talk about it more later,
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talk about it more later when I'm forced to do the boring thing and just cover
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all the IO registers that aren't covered anywhere else.
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One thing of note is the way that the 16-bit bus affects us: the instructions to
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execute are coming through the same bus as the rest of the game data, so we want
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|
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@ -227,9 +226,10 @@ builds starts with `thumbv4`.
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* `0xE000000` to `0xE00FFFF` (64k)
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The game pak SRAM has an 8-bit bus. Why did Pokémon always take so long to save?
|
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This is why. It also has some amount of wait, but as with the ROM, the details
|
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depend on your game pak hardware (and also as with ROM, you can adjust the
|
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settings with an IO register, should you need to).
|
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Saving the whole game one byte at a time is why. The SRAM also has some amount
|
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of wait, but as with the ROM, the details depend on your game pak hardware (and
|
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also as with ROM, you can adjust the settings with an IO register, should you
|
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need to).
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One thing to note about the SRAM is that the GBA has a Direct Memory Access
|
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(DMA) feature that can be used for bulk memory movements in some cases, but the
|
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|
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@ -12,8 +12,8 @@ our RAM is for scratch space, all that stuff. Even if we can't put all of them
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to use at once, it's helpful to have an idea of what will be available in the
|
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long run.
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Tiled modes bring us two big new concepts that each have their own complexity:
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backgrounds and objects. They share some concepts, but fundamentally the
|
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Tiled modes bring us three big new concepts that each have their own complexity:
|
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tiles, backgrounds, and objects. Backgrounds and objects both use tiles, but the
|
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background is for creating a very large static space that you can scroll around
|
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the view within, and the objects are about having a few moving bits that appear
|
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over the background. Careful use of backgrounds and objects is key to having the
|
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|
|
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130
book/src/ch03/tile_data.md
Normal file
130
book/src/ch03/tile_data.md
Normal file
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@ -0,0 +1,130 @@
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# Tile Data
|
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|
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When using the GBA's hardware graphics, if you want to let the hardware do most
|
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of the work you have to use Modes 0, 1 or 2. However, to do that we first have
|
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to learn about how tile data works inside of the GBA.
|
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## Tiles
|
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Fundamentally, a tile is an 8x8 image. If you want anything bigger than 8x8 you
|
||||
need to arrange several tiles so that it looks like whatever you're trying to
|
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draw.
|
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|
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As was already mentioned, the GBA supports two different color modes: 4 bits per
|
||||
pixel and 8 bits per pixel. This means that we have two types of tile that we
|
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need to model. The pixel bits always represent an index into the PALRAM.
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|
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* With 4 bits per pixel, the PALRAM is imagined to be 16 **palbank** sections of
|
||||
16 palette entries each. The image data selects the index within the palbank,
|
||||
and an external configuration selects which palbank is used.
|
||||
* With 8 bits per pixel, the PALRAM is imagined to be a single 256 entry array
|
||||
and the index just directly picks which of the 256 colors is used.
|
||||
|
||||
Knowing this, we can write the following definitions:
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|
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```rust
|
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#[derive(Debug, Clone, Copy, Default)]
|
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#[repr(transparent)]
|
||||
pub struct Tile4bpp {
|
||||
data: [u32; 8]
|
||||
}
|
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|
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#[derive(Debug, Clone, Copy, Default)]
|
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#[repr(transparent)]
|
||||
pub struct Tile8bpp {
|
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data: [u32; 16]
|
||||
}
|
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```
|
||||
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I hope this makes sense so far. At 4bpp, we have 4 bits per pixel, times 8
|
||||
pixels per line, times 8 lines: 256 bits required. Similarly, at 8 bits per
|
||||
pixel we'll need 512 bits. Why are we defining them as arrays of `u32` values?
|
||||
Because when it comes time to do bulk copies the fastest way to it will be to go
|
||||
one whole machine word at a time. If we make the data inside the type be an
|
||||
array of `u32` then it'll already be aligned for fast `u32` bulk copies.
|
||||
|
||||
Keeping track of the current color depth is naturally the _programmer's_
|
||||
problem. If you get it wrong you'll see a whole ton of garbage pixels all over
|
||||
the screen, and you'll probably be able to guess why. You know, unless you did
|
||||
one of the other things that can make a bunch of garbage pixels show up all over
|
||||
the screen. Graphics programming is fun like that.
|
||||
|
||||
## Charblocks
|
||||
|
||||
Tiles don't just sit on their own, they get grouped into **charblocks**. Long
|
||||
ago in the distant past, video games were built with hardware that was also used
|
||||
to make text terminals. So tile image data was called "character data". In fact
|
||||
some guides will even call the regular mode for the background layers "text
|
||||
mode", despite the fact that you obviously don't have to show text at all.
|
||||
|
||||
A charblock is 16kb long (`0x4000` bytes), which means that the number of tiles
|
||||
that fit into a charblock depends on your color depth. With 4bpp you get 512
|
||||
tiles, and with 8bpp there's 256 tiles. So they'd be something like this:
|
||||
|
||||
```rust
|
||||
#[derive(Clone, Copy)]
|
||||
#[repr(transparent)]
|
||||
pub struct Charblock4bpp {
|
||||
data: [Tile4bpp; 512],
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
#[repr(transparent)]
|
||||
pub struct Charblock8bpp {
|
||||
data: [Tile8bpp; 256],
|
||||
}
|
||||
```
|
||||
|
||||
You'll note that we can't even derive `Debug` or `Default` any more because the
|
||||
arrays are so big. Rust supports Clone and Copy for arrays of any size, but the
|
||||
rest is still size 32 or less. We won't generally be making up an entire
|
||||
Charblock on the fly though, so it's not a big deal. If we _absolutely_ had to,
|
||||
we could call `core::mem::zeroed()`, but we really don't want to be trying to
|
||||
build a whole charblock at runtime. We'll usually want to define our tile data
|
||||
as `const` charblock values (or even parts of charblock values) that we then
|
||||
load out of the game pak ROM at runtime.
|
||||
|
||||
Anyway, with 16k per charblock and only 96k total in VRAM, it's easy math to see
|
||||
that there's 6 different charblocks in VRAM when in a tiled mode. The first four
|
||||
of these are for backgrounds, and the other two are for objects. There's rules
|
||||
for how a tile ID on a background or object selects a tile within a charblock,
|
||||
but since they're different between backgrounds and objects we'll cover that on
|
||||
their own pages.
|
||||
|
||||
## Image Editing
|
||||
|
||||
It's very important to note that if you use a normal image editor you'll get
|
||||
very bad results if you translate that directly into GBA memory.
|
||||
|
||||
Imagine you have part of an image that's 16 by 16 pixels, aka 2 tiles by 2
|
||||
tiles. The data for that bitmap is the 1st row of the 1st tile, then the 1st row
|
||||
of the 2nd tile. However, when we translate that into the GBA, the first 8
|
||||
pixels will indeed be the first 8 tile pixels, but then the next 8 pixels in
|
||||
memory will be used as the _2nd row of the first tile_, not the 1st row of the
|
||||
2nd tile.
|
||||
|
||||
So, how do we fix this?
|
||||
|
||||
Well, the simple but annoying way is to edit your tile image as being an 8 pixel
|
||||
wide image and then have the image get super tall as you add more and more
|
||||
tiles. It can work, but it's really impractical if you have any multi-tile
|
||||
things that you're trying to do.
|
||||
|
||||
Instead, there are some image conversion tools that devkitpro provides in their
|
||||
gba-dev section. They let you take normal images and then repackage them and
|
||||
export it in various formats that you can then compile into your project.
|
||||
|
||||
Ketsuban uses the [grit](http://www.coranac.com/projects/grit/) tool, with the
|
||||
following suggestions:
|
||||
|
||||
1) Include an actual resource file and a file describing it somewhere in your
|
||||
project (see [the grit
|
||||
manual](http://www.coranac.com/man/grit/html/index.htm) for all details
|
||||
involved here).
|
||||
2) In a `build.rs` you run `grit` on each resource+description pair, such as in
|
||||
this [old gist
|
||||
example](https://gist.github.com/ketsuban/526fa55fbef0a3ccd4c7cd6204f29f94)
|
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3) Then within your rust code you use the
|
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[include_bytes!](https://doc.rust-lang.org/core/macro.include_bytes.html)
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macro to have the formatted resource be available as a const value you can
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html" class="active"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html" class="active"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html" class="active"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html" class="active"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html" class="active"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
|
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html" class="active"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html" class="active"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
|
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html" class="active"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html" class="active"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html" class="active"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html" class="active"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html" class="active"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html" class="active"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html" class="active"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html" class="active"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html" class="active"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html" class="active"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html" class="active"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html" class="active"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html" class="active"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html" class="active"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html" class="active"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html" class="active"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html" class="active"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html" class="active"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html" class="active"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<a class="header" href="#gba-memory" id="gba-memory"><h1>GBA Memory</h1></a>
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<a class="header" href="#gba-memory-mapping" id="gba-memory-mapping"><h1>GBA Memory Mapping</h1></a>
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<p>The <a href="http://problemkaputt.de/gbatek.htm#gbamemorymap">GBA Memory Map</a> has
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several memory portions to it, each with their own little differences. Most of
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the memory has pre-determined use according to the hardware, but there is also
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html" class="active"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html" class="active"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html" class="active"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html" class="active"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
|
||||
</nav>
|
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|
||||
<div id="page-wrapper" class="page-wrapper">
|
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@ -147,8 +147,8 @@ memory for tiled graphics, but also things like all those IO registers, where
|
|||
our RAM is for scratch space, all that stuff. Even if we can't put all of them
|
||||
to use at once, it's helpful to have an idea of what will be available in the
|
||||
long run.</p>
|
||||
<p>Tiled modes bring us two big new concepts that each have their own complexity:
|
||||
backgrounds and objects. They share some concepts, but fundamentally the
|
||||
<p>Tiled modes bring us three big new concepts that each have their own complexity:
|
||||
tiles, backgrounds, and objects. Backgrounds and objects both use tiles, but the
|
||||
background is for creating a very large static space that you can scroll around
|
||||
the view within, and the objects are about having a few moving bits that appear
|
||||
over the background. Careful use of backgrounds and objects is key to having the
|
||||
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@ -177,7 +177,7 @@ check, and then if they match the pair disappears.</p>
|
|||
|
||||
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||||
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||||
<a rel="next" href="../ch03/gba_memory.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
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<i class="fa fa-angle-right"></i>
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</a>
|
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@ -195,7 +195,7 @@ check, and then if they match the pair disappears.</p>
|
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||||
|
||||
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<a href="../ch03/gba_memory.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
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<a href="../ch03/gba_memory_mapping.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
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<i class="fa fa-angle-right"></i>
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</a>
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|
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@ -72,7 +72,7 @@
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|||
</script>
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<nav id="sidebar" class="sidebar" aria-label="Table of contents">
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html" class="active"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
|
||||
<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html" class="active"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
|
||||
</nav>
|
||||
|
||||
<div id="page-wrapper" class="page-wrapper">
|
||||
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|
|||
|
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@ -72,7 +72,7 @@
|
|||
</script>
|
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|
||||
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
|
||||
<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html" class="active"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
|
||||
<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html" class="active"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
|
||||
</nav>
|
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|
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<div id="page-wrapper" class="page-wrapper">
|
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|
|
@ -144,7 +144,7 @@
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<nav class="nav-wrapper" aria-label="Page navigation">
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<a rel="prev" href="../ch03/tiled_backgrounds.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
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@ -162,7 +162,7 @@
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<a href="../ch03/tiled_backgrounds.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
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</a>
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@ -3,7 +3,7 @@
|
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<head>
|
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<!-- Book generated using mdBook -->
|
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<meta charset="UTF-8">
|
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<title>Tiled Backgrounds - Rust GBA Guide</title>
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<title>Regular Backgrounds - Rust GBA Guide</title>
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@ -72,7 +72,7 @@
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</script>
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<nav id="sidebar" class="sidebar" aria-label="Table of contents">
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<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="../ch03/tiled_backgrounds.html" class="active"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
|
||||
<ol class="chapter"><li><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="../ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="../ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="../ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="../ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="../ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="../ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="../ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="../ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="../ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="../ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="../ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="../ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="../ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="../ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="../ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="../ch03/regular_backgrounds.html" class="active"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="../ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="../ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="../ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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</nav>
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@ -144,7 +144,7 @@
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200
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<ol class="chapter"><li><a href="introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="introduction.html" class="active"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="introduction.html" class="active"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
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<ol class="chapter"><li><a href="introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="ch03/gba_memory.html"><strong aria-hidden="true">5.1.</strong> GBA Memory</a></li><li><a href="ch03/tiled_backgrounds.html"><strong aria-hidden="true">5.2.</strong> Tiled Backgrounds</a></li><li><a href="ch03/object_basics.html"><strong aria-hidden="true">5.3.</strong> Object Basics</a></li><li><a href="ch03/gba_rng.html"><strong aria-hidden="true">5.4.</strong> GBA RNG</a></li><li><a href="ch03/memory_game.html"><strong aria-hidden="true">5.5.</strong> memory_game</a></li></ol></li></ol>
|
||||
<ol class="chapter"><li><a href="introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li><a href="ch00/index.html"><strong aria-hidden="true">2.</strong> Ch 0: Development Setup</a></li><li><a href="ch01/index.html"><strong aria-hidden="true">3.</strong> Ch 1: Hello GBA</a></li><li><ol class="section"><li><a href="ch01/hello1.html"><strong aria-hidden="true">3.1.</strong> hello1</a></li><li><a href="ch01/volatile.html"><strong aria-hidden="true">3.2.</strong> Volatile</a></li><li><a href="ch01/io_registers.html"><strong aria-hidden="true">3.3.</strong> IO Registers</a></li><li><a href="ch01/the_display_control_register.html"><strong aria-hidden="true">3.4.</strong> The Display Control Register</a></li><li><a href="ch01/video_memory_intro.html"><strong aria-hidden="true">3.5.</strong> Video Memory Intro</a></li><li><a href="ch01/hello2.html"><strong aria-hidden="true">3.6.</strong> hello2</a></li></ol></li><li><a href="ch02/index.html"><strong aria-hidden="true">4.</strong> Ch 2: User Input</a></li><li><ol class="section"><li><a href="ch02/the_key_input_register.html"><strong aria-hidden="true">4.1.</strong> The Key Input Register</a></li><li><a href="ch02/the_vcount_register.html"><strong aria-hidden="true">4.2.</strong> The VCount Register</a></li><li><a href="ch02/light_cycle.html"><strong aria-hidden="true">4.3.</strong> light_cycle</a></li></ol></li><li><a href="ch03/index.html"><strong aria-hidden="true">5.</strong> Ch 3: Memory and Objects</a></li><li><ol class="section"><li><a href="ch03/gba_memory_mapping.html"><strong aria-hidden="true">5.1.</strong> GBA Memory Mapping</a></li><li><a href="ch03/tile_data.html"><strong aria-hidden="true">5.2.</strong> Tile Data</a></li><li><a href="ch03/regular_backgrounds.html"><strong aria-hidden="true">5.3.</strong> Regular Backgrounds</a></li><li><a href="ch03/object_basics.html"><strong aria-hidden="true">5.4.</strong> Object Basics</a></li><li><a href="ch03/gba_rng.html"><strong aria-hidden="true">5.5.</strong> GBA RNG</a></li><li><a href="ch03/memory_game.html"><strong aria-hidden="true">5.6.</strong> memory_game</a></li></ol></li></ol>
|
||||
</nav>
|
||||
|
||||
<div id="page-wrapper" class="page-wrapper">
|
||||
|
|
@ -1283,8 +1283,8 @@ memory for tiled graphics, but also things like all those IO registers, where
|
|||
our RAM is for scratch space, all that stuff. Even if we can't put all of them
|
||||
to use at once, it's helpful to have an idea of what will be available in the
|
||||
long run.</p>
|
||||
<p>Tiled modes bring us two big new concepts that each have their own complexity:
|
||||
backgrounds and objects. They share some concepts, but fundamentally the
|
||||
<p>Tiled modes bring us three big new concepts that each have their own complexity:
|
||||
tiles, backgrounds, and objects. Backgrounds and objects both use tiles, but the
|
||||
background is for creating a very large static space that you can scroll around
|
||||
the view within, and the objects are about having a few moving bits that appear
|
||||
over the background. Careful use of backgrounds and objects is key to having the
|
||||
|
|
@ -1301,7 +1301,7 @@ without trading away too much in terms of quality.</p>
|
|||
<p>To top it all off, we'll make a simple "memory game" sort of thing. There's some
|
||||
face down cards in a grid, you pick one to check, then you pick the other to
|
||||
check, and then if they match the pair disappears.</p>
|
||||
<a class="header" href="#gba-memory" id="gba-memory"><h1>GBA Memory</h1></a>
|
||||
<a class="header" href="#gba-memory-mapping" id="gba-memory-mapping"><h1>GBA Memory Mapping</h1></a>
|
||||
<p>The <a href="http://problemkaputt.de/gbatek.htm#gbamemorymap">GBA Memory Map</a> has
|
||||
several memory portions to it, each with their own little differences. Most of
|
||||
the memory has pre-determined use according to the hardware, but there is also
|
||||
|
|
@ -1514,6 +1514,7 @@ settings with an IO register, should you need to).</p>
|
|||
(DMA) feature that can be used for bulk memory movements in some cases, but the
|
||||
DMA <em>cannot</em> access the SRAM region. You really are stuck reading and writing
|
||||
one byte at a time when you're using the SRAM.</p>
|
||||
<a class="header" href="#tile-data" id="tile-data"><h1>Tile Data</h1></a>
|
||||
<a class="header" href="#tiled-backgrounds" id="tiled-backgrounds"><h1>Tiled Backgrounds</h1></a>
|
||||
<p>TODO</p>
|
||||
<a class="header" href="#object-basics" id="object-basics"><h1>Object Basics</h1></a>
|
||||
|
|
|
|||
File diff suppressed because one or more lines are too long
File diff suppressed because one or more lines are too long
|
|
@ -174,24 +174,26 @@ pub fn wait_until_vdraw() {
|
|||
while vcount() >= SCREEN_HEIGHT as u16 {}
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
#[align(4)]
|
||||
pub struct ObjectAttributes {
|
||||
attr0: u16,
|
||||
attr1: u16,
|
||||
attr2: u16,
|
||||
filler: i16,
|
||||
#[derive(Debug, Clone, Copy, Default)]
|
||||
#[repr(transparent)]
|
||||
pub struct Tile4bpp {
|
||||
data: [u32; 8],
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
#[align(4)]
|
||||
pub struct ObjectAffine {
|
||||
filler0: [u16; 3],
|
||||
pa: i16,
|
||||
filler1: [u16; 3],
|
||||
pb: i16,
|
||||
filler2: [u16; 3],
|
||||
pc: i16,
|
||||
filler3: [u16; 3],
|
||||
pd: i16,
|
||||
#[derive(Debug, Clone, Copy, Default)]
|
||||
#[repr(transparent)]
|
||||
pub struct Tile8bpp {
|
||||
data: [u32; 16],
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
#[repr(transparent)]
|
||||
pub struct Charblock4bpp {
|
||||
data: [Tile4bpp; 512],
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
#[repr(transparent)]
|
||||
pub struct Charblock8bpp {
|
||||
data: [Tile8bpp; 256],
|
||||
}
|
||||
|
|
|
|||
|
|
@ -22,7 +22,7 @@ use super::*;
|
|||
/// LCD Control. Read/Write.
|
||||
///
|
||||
/// * [gbatek entry](http://problemkaputt.de/gbatek.htm#lcdiodisplaycontrol)
|
||||
pub const DISPCNT: VolatilePtr<u16> = VolatilePtr(0x4000000 as *mut u16);
|
||||
pub const DISPCNT: VolatilePtr<u16> = VolatilePtr(0x400_0000 as *mut u16);
|
||||
|
||||
newtype!(
|
||||
DisplayControlSetting,
|
||||
|
|
@ -34,7 +34,7 @@ newtype!(
|
|||
impl DisplayControlSetting {
|
||||
pub const BG_MODE_MASK: u16 = 0b111;
|
||||
|
||||
pub fn mode(&self) -> DisplayControlMode {
|
||||
pub fn mode(self) -> DisplayControlMode {
|
||||
match self.0 & Self::BG_MODE_MASK {
|
||||
0 => DisplayControlMode::Tiled0,
|
||||
1 => DisplayControlMode::Tiled1,
|
||||
|
|
@ -73,6 +73,7 @@ impl DisplayControlSetting {
|
|||
}
|
||||
|
||||
/// The six display modes available on the GBA.
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
pub enum DisplayControlMode {
|
||||
/// This basically allows for the most different things at once (all layers,
|
||||
/// 1024 tiles, two palette modes, etc), but you can't do affine
|
||||
|
|
@ -106,10 +107,10 @@ pub fn display_control() -> DisplayControlSetting {
|
|||
}
|
||||
|
||||
/// General LCD Status (STAT,LYC)
|
||||
pub const DISPSTAT: VolatilePtr<u16> = VolatilePtr(0x4000004 as *mut u16);
|
||||
pub const DISPSTAT: VolatilePtr<u16> = VolatilePtr(0x400_0004 as *mut u16);
|
||||
|
||||
/// Vertical Counter (LY)
|
||||
pub const VCOUNT: VolatilePtr<u16> = VolatilePtr(0x4000006 as *mut u16);
|
||||
pub const VCOUNT: VolatilePtr<u16> = VolatilePtr(0x400_0006 as *mut u16);
|
||||
|
||||
/// Obtains the current VCount value.
|
||||
pub fn vcount() -> u16 {
|
||||
|
|
@ -129,277 +130,277 @@ pub fn wait_until_vdraw() {
|
|||
}
|
||||
|
||||
/// BG0 Control
|
||||
pub const BG0CNT: VolatilePtr<u16> = VolatilePtr(0x4000008 as *mut u16);
|
||||
pub const BG0CNT: VolatilePtr<u16> = VolatilePtr(0x400_0008 as *mut u16);
|
||||
|
||||
/// BG1 Control
|
||||
pub const BG1CNT: VolatilePtr<u16> = VolatilePtr(0x400000A as *mut u16);
|
||||
pub const BG1CNT: VolatilePtr<u16> = VolatilePtr(0x400_000A as *mut u16);
|
||||
|
||||
/// BG2 Control
|
||||
pub const BG2CNT: VolatilePtr<u16> = VolatilePtr(0x400000C as *mut u16);
|
||||
pub const BG2CNT: VolatilePtr<u16> = VolatilePtr(0x400_000C as *mut u16);
|
||||
|
||||
/// BG3 Control
|
||||
pub const BG3CNT: VolatilePtr<u16> = VolatilePtr(0x400000E as *mut u16);
|
||||
pub const BG3CNT: VolatilePtr<u16> = VolatilePtr(0x400_000E as *mut u16);
|
||||
|
||||
/// BG0 X-Offset
|
||||
pub const BG0HOFS: VolatilePtr<u16> = VolatilePtr(0x4000010 as *mut u16);
|
||||
pub const BG0HOFS: VolatilePtr<u16> = VolatilePtr(0x400_0010 as *mut u16);
|
||||
|
||||
/// BG0 Y-Offset
|
||||
pub const BG0VOFS: VolatilePtr<u16> = VolatilePtr(0x4000012 as *mut u16);
|
||||
pub const BG0VOFS: VolatilePtr<u16> = VolatilePtr(0x400_0012 as *mut u16);
|
||||
|
||||
/// BG1 X-Offset
|
||||
pub const BG1HOFS: VolatilePtr<u16> = VolatilePtr(0x4000014 as *mut u16);
|
||||
pub const BG1HOFS: VolatilePtr<u16> = VolatilePtr(0x400_0014 as *mut u16);
|
||||
|
||||
/// BG1 Y-Offset
|
||||
pub const BG1VOFS: VolatilePtr<u16> = VolatilePtr(0x4000016 as *mut u16);
|
||||
pub const BG1VOFS: VolatilePtr<u16> = VolatilePtr(0x400_0016 as *mut u16);
|
||||
|
||||
/// BG2 X-Offset
|
||||
pub const BG2HOFS: VolatilePtr<u16> = VolatilePtr(0x4000018 as *mut u16);
|
||||
pub const BG2HOFS: VolatilePtr<u16> = VolatilePtr(0x400_0018 as *mut u16);
|
||||
|
||||
/// BG2 Y-Offset
|
||||
pub const BG2VOFS: VolatilePtr<u16> = VolatilePtr(0x400001A as *mut u16);
|
||||
pub const BG2VOFS: VolatilePtr<u16> = VolatilePtr(0x400_001A as *mut u16);
|
||||
|
||||
/// BG3 X-Offset
|
||||
pub const BG3HOFS: VolatilePtr<u16> = VolatilePtr(0x400001C as *mut u16);
|
||||
pub const BG3HOFS: VolatilePtr<u16> = VolatilePtr(0x400_001C as *mut u16);
|
||||
|
||||
/// BG3 Y-Offset
|
||||
pub const BG3VOFS: VolatilePtr<u16> = VolatilePtr(0x400001E as *mut u16);
|
||||
pub const BG3VOFS: VolatilePtr<u16> = VolatilePtr(0x400_001E as *mut u16);
|
||||
|
||||
/// BG2 Rotation/Scaling Parameter A (dx)
|
||||
pub const BG2PA: VolatilePtr<u16> = VolatilePtr(0x4000020 as *mut u16);
|
||||
pub const BG2PA: VolatilePtr<u16> = VolatilePtr(0x400_0020 as *mut u16);
|
||||
|
||||
/// BG2 Rotation/Scaling Parameter B (dmx)
|
||||
pub const BG2PB: VolatilePtr<u16> = VolatilePtr(0x4000022 as *mut u16);
|
||||
pub const BG2PB: VolatilePtr<u16> = VolatilePtr(0x400_0022 as *mut u16);
|
||||
|
||||
/// BG2 Rotation/Scaling Parameter C (dy)
|
||||
pub const BG2PC: VolatilePtr<u16> = VolatilePtr(0x4000024 as *mut u16);
|
||||
pub const BG2PC: VolatilePtr<u16> = VolatilePtr(0x400_0024 as *mut u16);
|
||||
|
||||
/// BG2 Rotation/Scaling Parameter D (dmy)
|
||||
pub const BG2PD: VolatilePtr<u16> = VolatilePtr(0x4000026 as *mut u16);
|
||||
pub const BG2PD: VolatilePtr<u16> = VolatilePtr(0x400_0026 as *mut u16);
|
||||
|
||||
/// BG2 Reference Point X-Coordinate
|
||||
pub const BG2X: VolatilePtr<u32> = VolatilePtr(0x4000028 as *mut u32);
|
||||
pub const BG2X: VolatilePtr<u32> = VolatilePtr(0x400_0028 as *mut u32);
|
||||
|
||||
/// BG2 Reference Point Y-Coordinate
|
||||
pub const BG2Y: VolatilePtr<u32> = VolatilePtr(0x400002C as *mut u32);
|
||||
pub const BG2Y: VolatilePtr<u32> = VolatilePtr(0x400_002C as *mut u32);
|
||||
|
||||
/// BG3 Rotation/Scaling Parameter A (dx)
|
||||
pub const BG3PA: VolatilePtr<u16> = VolatilePtr(0x4000030 as *mut u16);
|
||||
pub const BG3PA: VolatilePtr<u16> = VolatilePtr(0x400_0030 as *mut u16);
|
||||
|
||||
/// BG3 Rotation/Scaling Parameter B (dmx)
|
||||
pub const BG3PB: VolatilePtr<u16> = VolatilePtr(0x4000032 as *mut u16);
|
||||
pub const BG3PB: VolatilePtr<u16> = VolatilePtr(0x400_0032 as *mut u16);
|
||||
|
||||
/// BG3 Rotation/Scaling Parameter C (dy)
|
||||
pub const BG3PC: VolatilePtr<u16> = VolatilePtr(0x4000034 as *mut u16);
|
||||
pub const BG3PC: VolatilePtr<u16> = VolatilePtr(0x400_0034 as *mut u16);
|
||||
|
||||
/// BG3 Rotation/Scaling Parameter D (dmy)
|
||||
pub const BG3PD: VolatilePtr<u16> = VolatilePtr(0x4000036 as *mut u16);
|
||||
pub const BG3PD: VolatilePtr<u16> = VolatilePtr(0x400_0036 as *mut u16);
|
||||
|
||||
/// BG3 Reference Point X-Coordinate
|
||||
pub const BG3X: VolatilePtr<u32> = VolatilePtr(0x4000038 as *mut u32);
|
||||
pub const BG3X: VolatilePtr<u32> = VolatilePtr(0x400_0038 as *mut u32);
|
||||
|
||||
/// BG3 Reference Point Y-Coordinate
|
||||
pub const BG3Y: VolatilePtr<u32> = VolatilePtr(0x400003C as *mut u32);
|
||||
pub const BG3Y: VolatilePtr<u32> = VolatilePtr(0x400_003C as *mut u32);
|
||||
|
||||
/// Window 0 Horizontal Dimensions
|
||||
pub const WIN0H: VolatilePtr<u16> = VolatilePtr(0x4000040 as *mut u16);
|
||||
pub const WIN0H: VolatilePtr<u16> = VolatilePtr(0x400_0040 as *mut u16);
|
||||
|
||||
/// Window 1 Horizontal Dimensions
|
||||
pub const WIN1H: VolatilePtr<u16> = VolatilePtr(0x4000042 as *mut u16);
|
||||
pub const WIN1H: VolatilePtr<u16> = VolatilePtr(0x400_0042 as *mut u16);
|
||||
|
||||
/// Window 0 Vertical Dimensions
|
||||
pub const WIN0V: VolatilePtr<u16> = VolatilePtr(0x4000044 as *mut u16);
|
||||
pub const WIN0V: VolatilePtr<u16> = VolatilePtr(0x400_0044 as *mut u16);
|
||||
|
||||
/// Window 1 Vertical Dimensions
|
||||
pub const WIN1V: VolatilePtr<u16> = VolatilePtr(0x4000046 as *mut u16);
|
||||
pub const WIN1V: VolatilePtr<u16> = VolatilePtr(0x400_0046 as *mut u16);
|
||||
|
||||
/// Inside of Window 0 and 1
|
||||
pub const WININ: VolatilePtr<u16> = VolatilePtr(0x4000048 as *mut u16);
|
||||
pub const WININ: VolatilePtr<u16> = VolatilePtr(0x400_0048 as *mut u16);
|
||||
|
||||
/// Inside of OBJ Window & Outside of Windows
|
||||
pub const WINOUT: VolatilePtr<u16> = VolatilePtr(0x400004A as *mut u16);
|
||||
pub const WINOUT: VolatilePtr<u16> = VolatilePtr(0x400_004A as *mut u16);
|
||||
|
||||
/// Mosaic Size
|
||||
pub const MOSAIC: VolatilePtr<u16> = VolatilePtr(0x400004C as *mut u16);
|
||||
pub const MOSAIC: VolatilePtr<u16> = VolatilePtr(0x400_004C as *mut u16);
|
||||
|
||||
/// Color Special Effects Selection
|
||||
pub const BLDCNT: VolatilePtr<u16> = VolatilePtr(0x4000050 as *mut u16);
|
||||
pub const BLDCNT: VolatilePtr<u16> = VolatilePtr(0x400_0050 as *mut u16);
|
||||
|
||||
/// Alpha Blending Coefficients
|
||||
pub const BLDALPHA: VolatilePtr<u16> = VolatilePtr(0x4000052 as *mut u16);
|
||||
pub const BLDALPHA: VolatilePtr<u16> = VolatilePtr(0x400_0052 as *mut u16);
|
||||
|
||||
/// Brightness (Fade-In/Out) Coefficient
|
||||
pub const BLDY: VolatilePtr<u16> = VolatilePtr(0x4000054 as *mut u16);
|
||||
pub const BLDY: VolatilePtr<u16> = VolatilePtr(0x400_0054 as *mut u16);
|
||||
|
||||
/// Channel 1 Sweep register (NR10)
|
||||
pub const UND1CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000060 as *mut u16);
|
||||
pub const UND1CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0060 as *mut u16);
|
||||
|
||||
/// Channel 1 Duty/Length/Envelope (NR11, NR12)
|
||||
pub const UND1CNT_H: VolatilePtr<u16> = VolatilePtr(0x4000062 as *mut u16);
|
||||
pub const UND1CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_0062 as *mut u16);
|
||||
|
||||
/// Channel 1 Frequency/Control (NR13, NR14)
|
||||
pub const UND1CNT_X: VolatilePtr<u16> = VolatilePtr(0x4000064 as *mut u16);
|
||||
pub const UND1CNT_X: VolatilePtr<u16> = VolatilePtr(0x400_0064 as *mut u16);
|
||||
|
||||
/// Channel 2 Duty/Length/Envelope (NR21, NR22)
|
||||
pub const UND2CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000068 as *mut u16);
|
||||
pub const UND2CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0068 as *mut u16);
|
||||
|
||||
/// Channel 2 Frequency/Control (NR23, NR24)
|
||||
pub const UND2CNT_H: VolatilePtr<u16> = VolatilePtr(0x400006C as *mut u16);
|
||||
pub const UND2CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_006C as *mut u16);
|
||||
|
||||
/// Channel 3 Stop/Wave RAM select (NR30)
|
||||
pub const UND3CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000070 as *mut u16);
|
||||
pub const UND3CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0070 as *mut u16);
|
||||
|
||||
/// Channel 3 Length/Volume (NR31, NR32)
|
||||
pub const UND3CNT_H: VolatilePtr<u16> = VolatilePtr(0x4000072 as *mut u16);
|
||||
pub const UND3CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_0072 as *mut u16);
|
||||
|
||||
/// Channel 3 Frequency/Control (NR33, NR34)
|
||||
pub const UND3CNT_X: VolatilePtr<u16> = VolatilePtr(0x4000074 as *mut u16);
|
||||
pub const UND3CNT_X: VolatilePtr<u16> = VolatilePtr(0x400_0074 as *mut u16);
|
||||
|
||||
/// Channel 4 Length/Envelope (NR41, NR42)
|
||||
pub const UND4CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000078 as *mut u16);
|
||||
pub const UND4CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0078 as *mut u16);
|
||||
|
||||
/// Channel 4 Frequency/Control (NR43, NR44)
|
||||
pub const UND4CNT_H: VolatilePtr<u16> = VolatilePtr(0x400007C as *mut u16);
|
||||
pub const UND4CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_007C as *mut u16);
|
||||
|
||||
/// Control Stereo/Volume/Enable (NR50, NR51)
|
||||
pub const UNDCNT_L: VolatilePtr<u16> = VolatilePtr(0x4000080 as *mut u16);
|
||||
pub const UNDCNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0080 as *mut u16);
|
||||
|
||||
/// Control Mixing/DMA Control
|
||||
pub const UNDCNT_H: VolatilePtr<u16> = VolatilePtr(0x4000082 as *mut u16);
|
||||
pub const UNDCNT_H: VolatilePtr<u16> = VolatilePtr(0x400_0082 as *mut u16);
|
||||
|
||||
/// Control Sound on/off (NR52)
|
||||
pub const UNDCNT_X: VolatilePtr<u16> = VolatilePtr(0x4000084 as *mut u16);
|
||||
pub const UNDCNT_X: VolatilePtr<u16> = VolatilePtr(0x400_0084 as *mut u16);
|
||||
|
||||
/// Sound PWM Control
|
||||
pub const UNDBIAS: VolatilePtr<u16> = VolatilePtr(0x4000088 as *mut u16);
|
||||
pub const UNDBIAS: VolatilePtr<u16> = VolatilePtr(0x400_0088 as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM0_L: VolatilePtr<u16> = VolatilePtr(0x4000090 as *mut u16);
|
||||
pub const WAVE_RAM0_L: VolatilePtr<u16> = VolatilePtr(0x400_0090 as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM0_H: VolatilePtr<u16> = VolatilePtr(0x4000092 as *mut u16);
|
||||
pub const WAVE_RAM0_H: VolatilePtr<u16> = VolatilePtr(0x400_0092 as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM1_L: VolatilePtr<u16> = VolatilePtr(0x4000094 as *mut u16);
|
||||
pub const WAVE_RAM1_L: VolatilePtr<u16> = VolatilePtr(0x400_0094 as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM1_H: VolatilePtr<u16> = VolatilePtr(0x4000096 as *mut u16);
|
||||
pub const WAVE_RAM1_H: VolatilePtr<u16> = VolatilePtr(0x400_0096 as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM2_L: VolatilePtr<u16> = VolatilePtr(0x4000098 as *mut u16);
|
||||
pub const WAVE_RAM2_L: VolatilePtr<u16> = VolatilePtr(0x400_0098 as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM2_H: VolatilePtr<u16> = VolatilePtr(0x400009A as *mut u16);
|
||||
pub const WAVE_RAM2_H: VolatilePtr<u16> = VolatilePtr(0x400_009A as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM3_L: VolatilePtr<u16> = VolatilePtr(0x400009C as *mut u16);
|
||||
pub const WAVE_RAM3_L: VolatilePtr<u16> = VolatilePtr(0x400_009C as *mut u16);
|
||||
|
||||
/// Channel 3 Wave Pattern RAM (W/R)
|
||||
pub const WAVE_RAM3_H: VolatilePtr<u16> = VolatilePtr(0x400009E as *mut u16);
|
||||
pub const WAVE_RAM3_H: VolatilePtr<u16> = VolatilePtr(0x400_009E as *mut u16);
|
||||
|
||||
/// Channel A FIFO, Data 0-3
|
||||
pub const FIFO_A: VolatilePtr<u32> = VolatilePtr(0x40000A0 as *mut u32);
|
||||
pub const FIFO_A: VolatilePtr<u32> = VolatilePtr(0x400_00A0 as *mut u32);
|
||||
|
||||
/// Channel B FIFO, Data 0-3
|
||||
pub const FIFO_B: VolatilePtr<u32> = VolatilePtr(0x40000A4 as *mut u32);
|
||||
pub const FIFO_B: VolatilePtr<u32> = VolatilePtr(0x400_00A4 as *mut u32);
|
||||
|
||||
/// DMA 0 Source Address
|
||||
pub const DMA0SAD: VolatilePtr<u32> = VolatilePtr(0x40000B0 as *mut u32);
|
||||
pub const DMA0SAD: VolatilePtr<u32> = VolatilePtr(0x400_00B0 as *mut u32);
|
||||
|
||||
/// DMA 0 Destination Address
|
||||
pub const DMA0DAD: VolatilePtr<u32> = VolatilePtr(0x40000B4 as *mut u32);
|
||||
pub const DMA0DAD: VolatilePtr<u32> = VolatilePtr(0x400_00B4 as *mut u32);
|
||||
|
||||
/// DMA 0 Word Count
|
||||
pub const DMA0CNT_L: VolatilePtr<u16> = VolatilePtr(0x40000B8 as *mut u16);
|
||||
pub const DMA0CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_00B8 as *mut u16);
|
||||
|
||||
/// DMA 0 Control
|
||||
pub const DMA0CNT_H: VolatilePtr<u16> = VolatilePtr(0x40000BA as *mut u16);
|
||||
pub const DMA0CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_00BA as *mut u16);
|
||||
|
||||
/// DMA 1 Source Address
|
||||
pub const DMA1SAD: VolatilePtr<u32> = VolatilePtr(0x40000BC as *mut u32);
|
||||
pub const DMA1SAD: VolatilePtr<u32> = VolatilePtr(0x400_00BC as *mut u32);
|
||||
|
||||
/// DMA 1 Destination Address
|
||||
pub const DMA1DAD: VolatilePtr<u32> = VolatilePtr(0x40000C0 as *mut u32);
|
||||
pub const DMA1DAD: VolatilePtr<u32> = VolatilePtr(0x400_00C0 as *mut u32);
|
||||
|
||||
/// DMA 1 Word Count
|
||||
pub const DMA1CNT_L: VolatilePtr<u16> = VolatilePtr(0x40000C4 as *mut u16);
|
||||
pub const DMA1CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_00C4 as *mut u16);
|
||||
|
||||
/// DMA 1 Control
|
||||
pub const DMA1CNT_H: VolatilePtr<u16> = VolatilePtr(0x40000C6 as *mut u16);
|
||||
pub const DMA1CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_00C6 as *mut u16);
|
||||
|
||||
/// DMA 2 Source Address
|
||||
pub const DMA2SAD: VolatilePtr<u32> = VolatilePtr(0x40000C8 as *mut u32);
|
||||
pub const DMA2SAD: VolatilePtr<u32> = VolatilePtr(0x400_00C8 as *mut u32);
|
||||
|
||||
/// DMA 2 Destination Address
|
||||
pub const DMA2DAD: VolatilePtr<u32> = VolatilePtr(0x40000CC as *mut u32);
|
||||
pub const DMA2DAD: VolatilePtr<u32> = VolatilePtr(0x400_00CC as *mut u32);
|
||||
|
||||
/// DMA 2 Word Count
|
||||
pub const DMA2CNT_L: VolatilePtr<u16> = VolatilePtr(0x40000D0 as *mut u16);
|
||||
pub const DMA2CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_00D0 as *mut u16);
|
||||
|
||||
/// DMA 2 Control
|
||||
pub const DMA2CNT_H: VolatilePtr<u16> = VolatilePtr(0x40000D2 as *mut u16);
|
||||
pub const DMA2CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_00D2 as *mut u16);
|
||||
|
||||
/// DMA 3 Source Address
|
||||
pub const DMA3SAD: VolatilePtr<u32> = VolatilePtr(0x40000D4 as *mut u32);
|
||||
pub const DMA3SAD: VolatilePtr<u32> = VolatilePtr(0x400_00D4 as *mut u32);
|
||||
|
||||
/// DMA 3 Destination Address
|
||||
pub const DMA3DAD: VolatilePtr<u32> = VolatilePtr(0x40000D8 as *mut u32);
|
||||
pub const DMA3DAD: VolatilePtr<u32> = VolatilePtr(0x400_00D8 as *mut u32);
|
||||
|
||||
/// DMA 3 Word Count
|
||||
pub const DMA3CNT_L: VolatilePtr<u16> = VolatilePtr(0x40000DC as *mut u16);
|
||||
pub const DMA3CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_00DC as *mut u16);
|
||||
|
||||
/// DMA 3 Control
|
||||
pub const DMA3CNT_H: VolatilePtr<u16> = VolatilePtr(0x40000DE as *mut u16);
|
||||
pub const DMA3CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_00DE as *mut u16);
|
||||
|
||||
/// Timer 0 Counter/Reload
|
||||
pub const TM0CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000100 as *mut u16);
|
||||
pub const TM0CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0100 as *mut u16);
|
||||
|
||||
/// Timer 0 Control
|
||||
pub const TM0CNT_H: VolatilePtr<u16> = VolatilePtr(0x4000102 as *mut u16);
|
||||
pub const TM0CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_0102 as *mut u16);
|
||||
|
||||
/// Timer 1 Counter/Reload
|
||||
pub const TM1CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000104 as *mut u16);
|
||||
pub const TM1CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0104 as *mut u16);
|
||||
|
||||
/// Timer 1 Control
|
||||
pub const TM1CNT_H: VolatilePtr<u16> = VolatilePtr(0x4000106 as *mut u16);
|
||||
pub const TM1CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_0106 as *mut u16);
|
||||
|
||||
/// Timer 2 Counter/Reload
|
||||
pub const TM2CNT_L: VolatilePtr<u16> = VolatilePtr(0x4000108 as *mut u16);
|
||||
pub const TM2CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_0108 as *mut u16);
|
||||
|
||||
/// Timer 2 Control
|
||||
pub const TM2CNT_H: VolatilePtr<u16> = VolatilePtr(0x400010A as *mut u16);
|
||||
pub const TM2CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_010A as *mut u16);
|
||||
|
||||
/// Timer 3 Counter/Reload
|
||||
pub const TM3CNT_L: VolatilePtr<u16> = VolatilePtr(0x400010C as *mut u16);
|
||||
pub const TM3CNT_L: VolatilePtr<u16> = VolatilePtr(0x400_010C as *mut u16);
|
||||
|
||||
/// Timer 3 Control
|
||||
pub const TM3CNT_H: VolatilePtr<u16> = VolatilePtr(0x400010E as *mut u16);
|
||||
pub const TM3CNT_H: VolatilePtr<u16> = VolatilePtr(0x400_010E as *mut u16);
|
||||
|
||||
/// SIO Data (Normal-32bit Mode; shared with below)
|
||||
pub const SIODATA32: VolatilePtr<u32> = VolatilePtr(0x4000120 as *mut u32);
|
||||
pub const SIODATA32: VolatilePtr<u32> = VolatilePtr(0x400_0120 as *mut u32);
|
||||
|
||||
/// SIO Data 0 (Parent) (Multi-Player Mode)
|
||||
pub const SIOMULTI0: VolatilePtr<u16> = VolatilePtr(0x4000120 as *mut u16);
|
||||
pub const SIOMULTI0: VolatilePtr<u16> = VolatilePtr(0x400_0120 as *mut u16);
|
||||
|
||||
/// SIO Data 1 (1st Child) (Multi-Player Mode)
|
||||
pub const SIOMULTI1: VolatilePtr<u16> = VolatilePtr(0x4000122 as *mut u16);
|
||||
pub const SIOMULTI1: VolatilePtr<u16> = VolatilePtr(0x400_0122 as *mut u16);
|
||||
|
||||
/// SIO Data 2 (2nd Child) (Multi-Player Mode)
|
||||
pub const SIOMULTI2: VolatilePtr<u16> = VolatilePtr(0x4000124 as *mut u16);
|
||||
pub const SIOMULTI2: VolatilePtr<u16> = VolatilePtr(0x400_0124 as *mut u16);
|
||||
|
||||
/// SIO Data 3 (3rd Child) (Multi-Player Mode)
|
||||
pub const SIOMULTI3: VolatilePtr<u16> = VolatilePtr(0x4000126 as *mut u16);
|
||||
pub const SIOMULTI3: VolatilePtr<u16> = VolatilePtr(0x400_0126 as *mut u16);
|
||||
|
||||
/// SIO Control Register
|
||||
pub const SIOCNT: VolatilePtr<u16> = VolatilePtr(0x4000128 as *mut u16);
|
||||
pub const SIOCNT: VolatilePtr<u16> = VolatilePtr(0x400_0128 as *mut u16);
|
||||
|
||||
/// D SIO Data (Local of MultiPlayer; shared below)
|
||||
pub const SIOMLT_SEN: VolatilePtr<u16> = VolatilePtr(0x400012A as *mut u16);
|
||||
pub const SIOMLT_SEN: VolatilePtr<u16> = VolatilePtr(0x400_012A as *mut u16);
|
||||
|
||||
/// SIO Data (Normal-8bit and UART Mode)
|
||||
pub const SIODATA8: VolatilePtr<u16> = VolatilePtr(0x400012A as *mut u16);
|
||||
pub const SIODATA8: VolatilePtr<u16> = VolatilePtr(0x400_012A as *mut u16);
|
||||
|
||||
/// Key Status
|
||||
pub const KEYINPUT: VolatilePtr<u16> = VolatilePtr(0x4000130 as *mut u16);
|
||||
pub const KEYINPUT: VolatilePtr<u16> = VolatilePtr(0x400_0130 as *mut u16);
|
||||
|
||||
/// A "tribool" value helps us interpret the arrow pad.
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
|
|
@ -415,7 +416,7 @@ newtype!(KeyInputSetting, u16, "A newtype over the key input state of the GBA");
|
|||
|
||||
#[allow(missing_docs)]
|
||||
impl KeyInputSetting {
|
||||
register_bit!(A_BIT, u16, 1 << 0, a_pressed);
|
||||
register_bit!(A_BIT, u16, 1, a_pressed);
|
||||
register_bit!(B_BIT, u16, 1 << 1, b_pressed);
|
||||
register_bit!(SELECT_BIT, u16, 1 << 2, select_pressed);
|
||||
register_bit!(START_BIT, u16, 1 << 3, start_pressed);
|
||||
|
|
@ -427,13 +428,13 @@ impl KeyInputSetting {
|
|||
register_bit!(L_BIT, u16, 1 << 9, l_pressed);
|
||||
|
||||
/// Takes the difference between these keys and another set of keys.
|
||||
pub fn difference(&self, other: KeyInputSetting) -> KeyInputSetting {
|
||||
pub fn difference(self, other: KeyInputSetting) -> KeyInputSetting {
|
||||
KeyInputSetting(self.0 ^ other.0)
|
||||
}
|
||||
|
||||
/// Gives the arrow pad value as a tribool, with Plus being increased column
|
||||
/// value (right).
|
||||
pub fn column_direction(&self) -> TriBool {
|
||||
pub fn column_direction(self) -> TriBool {
|
||||
if self.right_pressed() {
|
||||
TriBool::Plus
|
||||
} else if self.left_pressed() {
|
||||
|
|
@ -445,7 +446,7 @@ impl KeyInputSetting {
|
|||
|
||||
/// Gives the arrow pad value as a tribool, with Plus being increased row
|
||||
/// value (down).
|
||||
pub fn row_direction(&self) -> TriBool {
|
||||
pub fn row_direction(self) -> TriBool {
|
||||
if self.down_pressed() {
|
||||
TriBool::Plus
|
||||
} else if self.up_pressed() {
|
||||
|
|
@ -465,31 +466,31 @@ pub fn key_input() -> KeyInputSetting {
|
|||
}
|
||||
|
||||
/// Key Interrupt Control
|
||||
pub const KEYCNT: VolatilePtr<u16> = VolatilePtr(0x4000132 as *mut u16);
|
||||
pub const KEYCNT: VolatilePtr<u16> = VolatilePtr(0x400_0132 as *mut u16);
|
||||
|
||||
/// SIO Mode Select/General Purpose Data
|
||||
pub const RCNT: VolatilePtr<u16> = VolatilePtr(0x4000134 as *mut u16);
|
||||
pub const RCNT: VolatilePtr<u16> = VolatilePtr(0x400_0134 as *mut u16);
|
||||
|
||||
/// SIO JOY Bus Control
|
||||
pub const JOYCNT: VolatilePtr<u16> = VolatilePtr(0x4000140 as *mut u16);
|
||||
pub const JOYCNT: VolatilePtr<u16> = VolatilePtr(0x400_0140 as *mut u16);
|
||||
|
||||
/// SIO JOY Bus Receive Data
|
||||
pub const JOY_RECV: VolatilePtr<u32> = VolatilePtr(0x4000150 as *mut u32);
|
||||
pub const JOY_RECV: VolatilePtr<u32> = VolatilePtr(0x400_0150 as *mut u32);
|
||||
|
||||
/// SIO JOY Bus Transmit Data
|
||||
pub const JOY_TRANS: VolatilePtr<u32> = VolatilePtr(0x4000154 as *mut u32);
|
||||
pub const JOY_TRANS: VolatilePtr<u32> = VolatilePtr(0x400_0154 as *mut u32);
|
||||
|
||||
/// SIO JOY Bus Receive Status
|
||||
pub const JOYSTAT: VolatilePtr<u16> = VolatilePtr(0x4000158 as *mut u16);
|
||||
pub const JOYSTAT: VolatilePtr<u16> = VolatilePtr(0x400_0158 as *mut u16);
|
||||
|
||||
/// Interrupt Enable Register
|
||||
pub const IE: VolatilePtr<u16> = VolatilePtr(0x4000200 as *mut u16);
|
||||
pub const IE: VolatilePtr<u16> = VolatilePtr(0x400_0200 as *mut u16);
|
||||
|
||||
/// Interrupt Request Flags / IRQ Acknowledge
|
||||
pub const IF: VolatilePtr<u16> = VolatilePtr(0x4000202 as *mut u16);
|
||||
pub const IF: VolatilePtr<u16> = VolatilePtr(0x400_0202 as *mut u16);
|
||||
|
||||
/// Game Pak Waitstate Control
|
||||
pub const WAITCNT: VolatilePtr<u16> = VolatilePtr(0x4000204 as *mut u16);
|
||||
pub const WAITCNT: VolatilePtr<u16> = VolatilePtr(0x400_0204 as *mut u16);
|
||||
|
||||
/// Interrupt Master Enable Register
|
||||
pub const IME: VolatilePtr<u16> = VolatilePtr(0x4000208 as *mut u16);
|
||||
pub const IME: VolatilePtr<u16> = VolatilePtr(0x400_0208 as *mut u16);
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
#![cfg_attr(not(test), no_std)]
|
||||
#![cfg_attr(not(test), feature(asm))]
|
||||
#![warn(missing_docs)]
|
||||
#![allow(clippy::cast_lossless)]
|
||||
|
||||
//! This crate helps you write GBA ROMs.
|
||||
//!
|
||||
|
|
|
|||
|
|
@ -69,13 +69,12 @@ pub fn mode3_read_pixel(col: isize, row: isize) -> Option<u16> {
|
|||
|
||||
/// Clears the entire screen to the color specified.
|
||||
pub unsafe fn mode3_clear_screen(color: u16) {
|
||||
// TODO: use DMA?
|
||||
let color = color as u32;
|
||||
let bulk_color = color << 16 | color;
|
||||
let mut ptr = VolatilePtr(VRAM_BASE_ADDRESS as *mut u32);
|
||||
for _ in 0..SCREEN_HEIGHT {
|
||||
for _ in 0..(SCREEN_WIDTH / 2) {
|
||||
ptr.write(bulk_color);
|
||||
ptr = ptr.offset(1);
|
||||
}
|
||||
for _ in 0..(SCREEN_HEIGHT * SCREEN_WIDTH / 2) {
|
||||
ptr.write(bulk_color);
|
||||
ptr = ptr.offset(1);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue