diff options
Diffstat (limited to 'src/bin.rs')
| -rw-r--r-- | src/bin.rs | 105 |
1 files changed, 96 insertions, 9 deletions
@@ -1,10 +1,12 @@ +#![feature(const_size_of)] extern crate core; use std::fs::File; use std::sync::{Mutex, Condvar}; -use std::io::Read; +use std::io::{Read, Write}; use std::intrinsics::transmute; use std::process::exit; +use std::cell::Cell; extern crate sdl2; #[macro_use] extern crate clap; @@ -14,6 +16,7 @@ use sdl2::keyboard::Keycode; use sdl2::rect::Rect; use clap::{Arg, App}; + mod utils; mod memory; #[macro_use] mod mos6502; mod ppu; @@ -73,7 +76,17 @@ impl Cartridge for SimpleCart { BankType::Sram => self.sram.len() } } - fn get_bank<'a>(&mut self, base: usize, size: usize, kind: BankType) -> &'a mut [u8] { + fn get_bank<'a>(&self, base: usize, size: usize, kind: BankType) -> &'a [u8] { + unsafe { + &*((&(match kind { + BankType::PrgRom => &self.prg_rom, + BankType::ChrRom => &self.chr_rom, + BankType::Sram => &self.sram, + })[base..base + size]) as *const [u8]) + } + } + + fn get_bank_mut<'a>(&mut self, base: usize, size: usize, kind: BankType) -> &'a mut [u8] { unsafe { &mut *((&mut (match kind { BankType::PrgRom => &mut self.prg_rom, @@ -82,8 +95,47 @@ impl Cartridge for SimpleCart { })[base..base + size]) as *mut [u8]) } } + fn get_mirror_type(&self) -> MirrorType {self.mirror_type} fn set_mirror_type(&mut self, mt: MirrorType) {self.mirror_type = mt} + + fn load(&mut self, reader: &mut utils::Read) -> bool { + let len = self.sram.len(); + (match reader.read(&mut self.sram) { + Some(x) => x == len, + None => false + }) && + utils::load_prefix(&mut self.mirror_type, 0, reader) + } + + fn save(&self, writer: &mut utils::Write) -> bool { + let len = self.sram.len(); + (match writer.write(&self.sram) { + Some(x) => x == len, + None => false + }) && + utils::save_prefix(&self.mirror_type, 0, writer) + } +} + +struct FileIO(File); + +impl utils::Read for FileIO { + fn read(&mut self, buf: &mut [u8]) -> Option<usize> { + match self.0.read(buf) { + Ok(x) => Some(x), + Err(_) => None + } + } +} + +impl utils::Write for FileIO { + fn write(&mut self, buf: &[u8]) -> Option<usize> { + match self.0.write(buf) { + Ok(x) => Some(x), + Err(_) => None + } + } } struct SDLWindow<'a> { @@ -95,6 +147,7 @@ struct SDLWindow<'a> { p1_ctl: &'a stdctl::Joystick, p1_keymap: [u8; 256], copy_area: Option<Rect>, + exit_flag: &'a Cell<bool> } macro_rules! gen_keymap { @@ -107,7 +160,8 @@ impl<'a> SDLWindow<'a> { fn new(sdl_context: &'a sdl2::Sdl, p1_ctl: &'a stdctl::Joystick, pixel_scale: u32, - full_screen: bool) -> Self { + full_screen: bool, + exit_flag: &'a Cell<bool>) -> Self { use Keycode::*; let video_subsystem = sdl_context.video().unwrap(); let mut actual_height = PIX_HEIGHT * pixel_scale; @@ -139,7 +193,7 @@ impl<'a> SDLWindow<'a> { PIX_WIDTH, PIX_HEIGHT).unwrap(), p1_button_state: 0, p1_ctl, p1_keymap: [stdctl::NULL; 256], - copy_area + copy_area, exit_flag }; { let keymap = &mut res.p1_keymap; @@ -209,7 +263,11 @@ impl<'a> ppu::Screen for SDLWindow<'a> { self.canvas.clear(); self.canvas.copy(&self.texture, self.copy_area, None).unwrap(); self.canvas.present(); - if self.poll() { exit(0) } + if self.poll() { + /* + */ + self.exit_flag.set(true) + } } } @@ -347,6 +405,11 @@ fn main() { .help("the iNES ROM file") .required(true) .index(1)) + .arg(Arg::with_name("load") + .short("l") + .long("load") + .required(false) + .takes_value(true)) .get_matches(); let scale = std::cmp::min(8, @@ -356,6 +419,7 @@ fn main() { /* load and parse iNES file */ let fname = matches.value_of("INPUT").unwrap(); + let lname = matches.value_of("load"); let mut file = File::open(fname).unwrap(); let mut rheader = [0; 16]; file.read(&mut rheader[..]).unwrap(); @@ -391,7 +455,7 @@ fn main() { let mut prg_rom = vec![0; prg_len]; let mut chr_rom = vec![0; chr_len]; - let sram = vec![0; 0x4000]; + let sram = vec![0; 0x2000]; println!("read prg {}", file.read(&mut prg_rom[..]).unwrap()); println!("read chr {}", file.read(&mut chr_rom[..]).unwrap()); @@ -412,9 +476,10 @@ fn main() { }).unwrap(); /* P1 controller */ let p1ctl = stdctl::Joystick::new(); - /* cartridge & mapper */ + /* construct mapper from cartridge data */ let cart = SimpleCart::new(chr_rom, prg_rom, sram, mirror); - let mut win = Box::new(SDLWindow::new(&sdl_context, &p1ctl, scale, full)); + let exit_flag = Cell::new(false); + let mut win = Box::new(SDLWindow::new(&sdl_context, &p1ctl, scale, full, &exit_flag)); let mut m: Box<mapper::Mapper> = match mapper_id { 0 | 2 => Box::new(mapper::Mapper2::new(cart)), 1 => Box::new(mapper::Mapper1::new(cart)), @@ -428,13 +493,35 @@ fn main() { let mut apu = APU::new(&mut spkr); let cpu_ptr = &mut cpu as *mut CPU; cpu.mem.bus.attach(cpu_ptr, &mut ppu, &mut apu); - cpu.powerup(); + match lname { + Some(s) => { + let mut file = FileIO(File::open(s).unwrap()); + cpu.load(&mut file); + ppu.load(&mut file); + apu.load(&mut file); + mapper.get_mut().load(&mut file); + debug_assert!(cpu.cycle == 0); + }, + None => { + cpu.powerup() + } + } device.resume(); loop { /* consume the leftover cycles from the last instruction */ while cpu.cycle > 0 { cpu.mem.bus.tick() } + if exit_flag.get() { + { + let mut file = FileIO(File::create("t.dat").unwrap()); + cpu.save(&mut file); + ppu.save(&mut file); + apu.save(&mut file); + mapper.save(&mut file); + } + exit(0); + } //print_cpu_trace(&cpu); cpu.step(); } |