begin move to lib
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parent
567cbf0264
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175
src/lib.rs
Normal file
175
src/lib.rs
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@ -0,0 +1,175 @@
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#![feature(
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exclusive_range_pattern,
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let_chains,
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slice_flatten,
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async_closure,
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bigint_helper_methods
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)]
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use std::{
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fs,
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io::{self, stdout, Write},
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};
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use gilrs::Gilrs;
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use minifb::Window;
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use once_cell::sync::OnceCell;
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use processor::{memory::Rom, Cpu};
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use crate::processor::memory::Memory;
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mod constants;
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mod processor;
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mod util;
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#[macro_export]
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macro_rules! verbose_println {
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($($tts:tt)*) => {
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if $crate::is_verbose() {
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println!($($tts)*);
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}
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};
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}
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#[macro_export]
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macro_rules! verbose_print {
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($($tts:tt)*) => {
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if $crate::is_verbose() {
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print!($($tts)*);
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}
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};
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}
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static mut PAUSE_ENABLED: bool = false;
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static mut PAUSE_QUEUED: bool = false;
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static VERBOSE: OnceCell<bool> = OnceCell::new();
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pub const WIDTH: usize = 160;
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pub const HEIGHT: usize = 144;
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static FACTOR: OnceCell<usize> = OnceCell::new();
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#[allow(clippy::too_many_arguments)]
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pub fn init(
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rom_path: String,
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bootrom_path: Option<String>,
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mut window: Window,
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connect_serial: bool,
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tile_window: bool,
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verbose: bool,
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step_by: Option<usize>,
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cycle_count: bool,
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factor: usize,
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) {
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VERBOSE.set(verbose).unwrap();
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FACTOR.set(factor).unwrap();
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crate::processor::memory::mmio::gpu::init_statics();
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let rom: Rom = match fs::read(rom_path) {
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Ok(data) => Rom::load(data),
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Err(e) => {
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println!("Error reading ROM: {e}");
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return;
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}
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};
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window.set_title(format!("{} on {}", rom.get_title(), rom.mbc_type()).as_str());
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let bootrom_enabled = bootrom_path.is_some();
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let bootrom: Option<Vec<u8>> = if let Some(path) = bootrom_path {
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match fs::read(path) {
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Ok(data) => Some(data),
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Err(e) => {
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println!("Error reading bootROM: {e}");
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return;
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}
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}
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} else {
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None
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};
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let mut cpu = Cpu::new(
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Memory::init(bootrom, rom, window, connect_serial, tile_window),
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bootrom_enabled,
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Gilrs::new().unwrap(),
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);
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let mut cycle_num = 0;
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verbose_println!("\n\n Begin execution...\n");
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match step_by {
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Some(step_size) => loop {
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for _ in 0..step_size {
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cycle_num += 1;
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if cycle_count {
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print_cycles(&cycle_num);
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}
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run_cycle(&mut cpu);
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}
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print!(" ...{cycle_num} cycles - press enter to continue\r");
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stdout().flush().unwrap();
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pause();
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},
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None => loop {
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cycle_num += 1;
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if cycle_count {
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print_cycles(&cycle_num);
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}
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run_cycle(&mut cpu);
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},
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}
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}
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fn run_cycle(cpu: &mut Cpu) {
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let will_pause = unsafe { PAUSE_QUEUED };
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let pause_enabled = unsafe { PAUSE_ENABLED };
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cpu.exec_next();
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if !pause_enabled && cpu.reg.pc >= 0x100 {
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unsafe { PAUSE_ENABLED = true };
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}
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if will_pause {
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pause_then_step();
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}
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}
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fn pause_then_step() {
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unsafe {
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if PAUSE_ENABLED {
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let line = pause();
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PAUSE_QUEUED = !line.contains("continue");
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}
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}
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}
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#[allow(dead_code)]
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fn pause_once() {
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println!("paused...");
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pause();
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}
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fn pause() -> String {
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let mut line = String::new();
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match io::stdin().read_line(&mut line) {
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Ok(_) => line,
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Err(_) => String::from(""),
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}
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}
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fn print_cycles(cycles: &i32) {
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if *cycles % 45678 != 0 {
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return;
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}
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let instructions_per_second = 400000;
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print!(
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"cycle {} - approx {} seconds on real hardware\r",
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cycles,
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cycles / instructions_per_second
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);
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stdout().flush().unwrap();
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}
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fn is_verbose() -> bool {
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match VERBOSE.get() {
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Some(v) => *v,
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None => false,
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}
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}
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177
src/main.rs
177
src/main.rs
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@ -1,45 +1,9 @@
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#![feature(
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exclusive_range_pattern,
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let_chains,
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slice_flatten,
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async_closure,
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bigint_helper_methods
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)]
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mod constants;
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mod processor;
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mod util;
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use clap::{ArgGroup, Parser};
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use gilrs::Gilrs;
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use gb_emu::{HEIGHT, WIDTH};
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use minifb::{Window, WindowOptions};
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use once_cell::sync::OnceCell;
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use processor::{
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memory::{Memory, Rom},
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Cpu,
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};
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use std::{
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fs,
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io::{self, stdout, Write},
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};
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#[macro_export]
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macro_rules! verbose_println {
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($($tts:tt)*) => {
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if $crate::is_verbose() {
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println!($($tts)*);
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}
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};
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}
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#[macro_export]
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macro_rules! verbose_print {
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($($tts:tt)*) => {
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if $crate::is_verbose() {
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print!($($tts)*);
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}
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};
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}
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/// Gameboy (DMG-A/B/C) emulator
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#[derive(Parser, Debug)]
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@ -79,54 +43,19 @@ struct Args {
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scale_factor: Option<usize>,
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}
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static mut PAUSE_ENABLED: bool = false;
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static mut PAUSE_QUEUED: bool = false;
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static VERBOSE: OnceCell<bool> = OnceCell::new();
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const WIDTH: usize = 160;
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const HEIGHT: usize = 144;
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static FACTOR: OnceCell<usize> = OnceCell::new();
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fn main() {
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let args = Args::parse();
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VERBOSE.set(args.verbose).unwrap();
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FACTOR
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.set(if let Some(factor) = args.scale_factor {
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let factor = if let Some(factor) = args.scale_factor {
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factor
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} else {
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3
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})
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.unwrap();
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crate::processor::memory::mmio::gpu::init_statics();
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let rom: Rom = match fs::read(args.rom) {
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Ok(data) => Rom::load(data),
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Err(e) => {
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println!("Error reading ROM: {e}");
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return;
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}
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};
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let bootrom_enabled = args.bootrom.is_some();
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let bootrom: Option<Vec<u8>> = if let Some(path) = args.bootrom {
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match fs::read(path) {
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Ok(data) => Some(data),
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Err(e) => {
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println!("Error reading bootROM: {e}");
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return;
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}
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}
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} else {
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None
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};
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let mut window = Window::new(
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format!("{} on {}", rom.get_title(), rom.mbc_type()).as_str(),
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WIDTH * FACTOR.get().unwrap(),
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HEIGHT * FACTOR.get().unwrap(),
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"emu",
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WIDTH * factor,
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HEIGHT * factor,
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WindowOptions::default(),
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)
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.unwrap_or_else(|e| {
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@ -137,89 +66,15 @@ fn main() {
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window.topmost(true);
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let mut cpu = Cpu::new(
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Memory::init(bootrom, rom, window, args.connect_serial, args.tile_window),
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bootrom_enabled,
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Gilrs::new().unwrap(),
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gb_emu::init(
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args.rom,
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args.bootrom,
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window,
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args.connect_serial,
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args.tile_window,
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args.verbose,
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args.step_by,
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args.cycle_count,
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factor,
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);
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let mut cycle_num = 0;
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verbose_println!("\n\n Begin execution...\n");
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match args.step_by {
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Some(step_size) => loop {
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for _ in 0..step_size {
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cycle_num += 1;
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if args.cycle_count {
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print_cycles(&cycle_num);
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}
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run_cycle(&mut cpu);
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}
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print!(" ...{cycle_num} cycles - press enter to continue\r");
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stdout().flush().unwrap();
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pause();
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},
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None => loop {
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cycle_num += 1;
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if args.cycle_count {
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print_cycles(&cycle_num);
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}
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run_cycle(&mut cpu);
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},
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}
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}
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fn run_cycle(cpu: &mut Cpu) {
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let will_pause = unsafe { PAUSE_QUEUED };
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let pause_enabled = unsafe { PAUSE_ENABLED };
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cpu.exec_next();
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if !pause_enabled && cpu.reg.pc >= 0x100 {
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unsafe { PAUSE_ENABLED = true };
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}
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if will_pause {
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pause_then_step();
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}
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}
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fn pause_then_step() {
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unsafe {
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if PAUSE_ENABLED {
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let line = pause();
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PAUSE_QUEUED = !line.contains("continue");
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}
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}
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}
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#[allow(dead_code)]
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fn pause_once() {
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println!("paused...");
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pause();
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}
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fn pause() -> String {
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let mut line = String::new();
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match io::stdin().read_line(&mut line) {
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Ok(_) => line,
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Err(_) => String::from(""),
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}
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}
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fn print_cycles(cycles: &i32) {
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if *cycles % 45678 != 0 {
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return;
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}
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let instructions_per_second = 400000;
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print!(
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"cycle {} - approx {} seconds on real hardware\r",
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cycles,
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cycles / instructions_per_second
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);
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stdout().flush().unwrap();
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}
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fn is_verbose() -> bool {
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match VERBOSE.get() {
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Some(v) => *v,
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None => false,
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}
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}
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