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try to keep the ideas of the addresses for blocks and the block data itself separate.

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This commit is contained in:
Lokathor 2022-10-13 19:41:29 -06:00
parent 342d8fc25a
commit 5059ceb7d4
2 changed files with 18 additions and 18 deletions
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2
examples/hello.rs
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@ -68,7 +68,7 @@ extern "C" fn main() -> ! {
{
// get the the tilemap copied into place
let tsb = TextScreenblock::new(31);
let tsb = TextScreenblockAddress::new(31);
tsb.write_words(&TILE_LAYOUT);
}

34
src/mmio.rs
View file

@ -224,13 +224,13 @@ def_mmio!(0x0600_C000 = CHARBLOCK3_8BPP: VolBlock<Tile8, Safe, Safe, 256>; "Char
#[inline]
#[must_use]
const fn screenblock_addr(index: usize) -> usize {
/// The VRAM offset per screenblock.
/// The VRAM offset per screenblock. This isn't affected by the screenblock's size.
const SCREENBLOCK_OFFSET: usize = 2_048;
0x0600_0000 + index * SCREENBLOCK_OFFSET
}
macro_rules! make_me_a_screenblock {
macro_rules! make_me_a_screenblock_addr {
( $(#[$name_meta:meta])* $name:ident($t:ty), $(#[$size_meta:meta])* size: $size:literal, $(#[$index_meta:meta])* max_index: $max_index:literal) => {
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(transparent)]
@ -274,41 +274,41 @@ macro_rules! make_me_a_screenblock {
}
}
make_me_a_screenblock!(
/// Screenblock for text mode backgrounds (32x32).
TextScreenblock(TextEntry),
make_me_a_screenblock_addr!(
/// Screenblock address for text mode backgrounds (32x32).
TextScreenblockAddress(TextEntry),
/// Size: 32x32
size: 32,
/// Max Index: 31
max_index: 31
);
make_me_a_screenblock!(
/// Screenblock for size 0 affine mode backgrounds (16x16).
AffineScreenBlock0(u8),
make_me_a_screenblock_addr!(
/// Screenblock address for size 0 affine mode backgrounds (16x16).
AffineScreenBlock0Address(u8),
/// Size: 16x16
size: 16,
/// Max Index: 31
max_index: 31
);
make_me_a_screenblock!(
/// Screenblock for size 1 affine mode backgrounds (32x32).
AffineScreenBlock1(u8),
make_me_a_screenblock_addr!(
/// Screenblock address for size 1 affine mode backgrounds (32x32).
AffineScreenBlock1Address(u8),
/// Size: 32x32
size: 32,
/// Max Index: 31
max_index: 31
);
make_me_a_screenblock!(
/// Screenblock for size 2 affine mode backgrounds (64x64).
AffineScreenBlock2(u8),
make_me_a_screenblock_addr!(
/// Screenblock address for size 2 affine mode backgrounds (64x64).
AffineScreenBlock2Address(u8),
/// Size: 64x64
size: 64,
/// Max Index: 29
max_index: 29
);
make_me_a_screenblock!(
/// Screenblock for size 3 affine mode backgrounds (128x128).
AffineScreenBlock3(u8),
make_me_a_screenblock_addr!(
/// Screenblock address for size 3 affine mode backgrounds (128x128).
AffineScreenBlock3Address(u8),
/// Size: 128x128
size: 128,
/// Max Index: 23