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-rw-r--r--src/main.rs282
1 files changed, 0 insertions, 282 deletions
diff --git a/src/main.rs b/src/main.rs
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index 6a350ff..0000000
--- a/src/main.rs
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@@ -1,282 +0,0 @@
-extern crate core;
-mod memory;
-mod mos6502;
-mod ppu;
-mod cartridge;
-mod mapper;
-mod controller;
-
-use std::fs::File;
-use std::io::Read;
-use core::cell::RefCell;
-use core::intrinsics::transmute;
-use cartridge::*;
-use controller::stdctl::{Joystick, Button};
-use std::time::{Instant, Duration};
-use std::thread::sleep;
-
-extern crate sdl2;
-
-use sdl2::pixels::Color;
-use sdl2::rect::Rect;
-use sdl2::pixels::PixelFormatEnum;
-use sdl2::event::Event;
-use sdl2::keyboard::Keycode;
-
-const PIXEL_SIZE: u32 = 2;
-const RGB_COLORS: [u32; 64] = [
- 0x666666, 0x002a88, 0x1412a7, 0x3b00a4, 0x5c007e, 0x6e0040, 0x6c0600, 0x561d00,
- 0x333500, 0x0b4800, 0x005200, 0x004f08, 0x00404d, 0x000000, 0x000000, 0x000000,
- 0xadadad, 0x155fd9, 0x4240ff, 0x7527fe, 0xa01acc, 0xb71e7b, 0xb53120, 0x994e00,
- 0x6b6d00, 0x388700, 0x0c9300, 0x008f32, 0x007c8d, 0x000000, 0x000000, 0x000000,
- 0xfffeff, 0x64b0ff, 0x9290ff, 0xc676ff, 0xf36aff, 0xfe6ecc, 0xfe8170, 0xea9e22,
- 0xbcbe00, 0x88d800, 0x5ce430, 0x45e082, 0x48cdde, 0x4f4f4f, 0x000000, 0x000000,
- 0xfffeff, 0xc0dfff, 0xd3d2ff, 0xe8c8ff, 0xfbc2ff, 0xfec4ea, 0xfeccc5, 0xf7d8a5,
- 0xe4e594, 0xcfef96, 0xbdf4ab, 0xb3f3cc, 0xb5ebf2, 0xb8b8b8, 0x000000, 0x000000,
-];
-
-const PIX_WIDTH: usize = 256;
-const PIX_HEIGHT: usize = 240;
-const FB_PITCH: usize = PIX_WIDTH * 3 * (PIXEL_SIZE as usize);
-const FB_SIZE: usize = PIX_HEIGHT * FB_PITCH * (PIXEL_SIZE as usize);
-const WIN_WIDTH: u32 = PIX_WIDTH as u32 * PIXEL_SIZE;
-const WIN_HEIGHT: u32 = PIX_HEIGHT as u32 * PIXEL_SIZE;
-
-struct SDLWindow<'a> {
- canvas: sdl2::render::WindowCanvas,
- events: sdl2::EventPump,
- frame_buffer: [u8; FB_SIZE],
- texture: sdl2::render::Texture,
- timer: Instant,
- duration_per_frame: Duration,
- p1_button_states: [bool; 8],
- p1_ctl: &'a Joystick,
- p1_keymap: [Button; 256],
-}
-
-macro_rules! gen_keymap {
- ($tab: ident, [$($x: expr, $y: expr), *]) => {
- {
- $(
- $tab[($x as usize) & 0xff] = $y;
- )*
- }
- };
-}
-
-impl<'a> SDLWindow<'a> {
- fn new(p1_ctl: &'a Joystick) -> Self {
- use Keycode::*;
- let sdl_context = sdl2::init().unwrap();
- let video_subsystem = sdl_context.video().unwrap();
- let window = video_subsystem.window("RuNES", WIN_WIDTH, WIN_HEIGHT)
- .position_centered()
- .opengl()
- .build()
- .unwrap();
- let mut canvas = window.into_canvas()
- .accelerated()
- .build().unwrap();
- let texture_creator = canvas.texture_creator();
- canvas.set_draw_color(Color::RGB(255, 255, 255));
- canvas.clear();
- canvas.present();
- let mut res = SDLWindow {
- canvas,
- events: sdl_context.event_pump().unwrap(),
- frame_buffer: [0; FB_SIZE],
- texture: texture_creator.create_texture_streaming(
- PixelFormatEnum::RGB24, WIN_WIDTH, WIN_HEIGHT).unwrap(),
- timer: Instant::now(),
- duration_per_frame: Duration::from_millis(1000 / 60),
- p1_button_states: [false; 8],
- p1_ctl, p1_keymap: [Button::Null; 256]
- };
- {
- let keymap = &mut res.p1_keymap;
- gen_keymap!(keymap, [I, Button::Up,
- K, Button::Down,
- J, Button::Left,
- L, Button::Right,
- Z, Button::A,
- X, Button::B,
- Return, Button::Start,
- S, Button::Select,
- Up, Button::Up,
- Down, Button::Down,
- Left, Button::Left,
- Right, Button::Right
- ]);
- }
- res
- }
-
- #[inline]
- fn poll(&mut self) -> bool {
- use Keycode::*;
- let p1_button_states = &mut self.p1_button_states;
- let p1_keymap = &self.p1_keymap;
- for event in self.events.poll_iter() {
- match event {
- Event::Quit {..} | Event::KeyDown { keycode: Some(Escape), .. } => {
- return true;
- },
- Event::KeyDown { keycode: Some(c), .. } => {
- match p1_keymap[(c as usize) & 0xff] {
- Button::Null => (),
- i => {
- p1_button_states[i as usize] = true;
- self.p1_ctl.set(p1_button_states);
- }
- }
- },
- Event::KeyUp { keycode: Some(c), .. } => {
- match p1_keymap[(c as usize) & 0xff] {
- Button::Null => (),
- i => {
- p1_button_states[i as usize] = false;
- self.p1_ctl.set(p1_button_states);
- }
- }
- },
- _ => ()
- }
- }
- false
- }
-}
-
-#[inline]
-fn get_rgb(color: u8) -> (u8, u8, u8) {
- let c = RGB_COLORS[color as usize];
- ((c >> 16) as u8, ((c >> 8) & 0xff) as u8, (c & 0xff) as u8)
-}
-
-impl<'a> ppu::Screen for SDLWindow<'a> {
- fn put(&mut self, x: u8, y: u8, color: u8) {
- let (r, g, b) = get_rgb(color);
- let mut base = ((y as u32 * PIXEL_SIZE) as usize * FB_PITCH) +
- (x as u32 * 3 * PIXEL_SIZE) as usize;
- for _ in 0..PIXEL_SIZE {
- let slice = &mut self.frame_buffer[base..base + 3 * PIXEL_SIZE as usize];
- let mut j = 0;
- for _ in 0..PIXEL_SIZE {
- slice[j] = r;
- slice[j + 1] = g;
- slice[j + 2] = b;
- j += 3;
- }
- base += FB_PITCH;
- }
- }
-
- fn render(&mut self) {
- self.texture.update(None, &self.frame_buffer, FB_PITCH).unwrap();
- self.canvas.clear();
- self.canvas.copy(&self.texture, None, Some(Rect::new(0, 0, WIN_WIDTH, WIN_HEIGHT))).unwrap();
- self.canvas.present();
- if self.poll() {std::process::exit(0);}
- let e = self.timer.elapsed();
- if self.duration_per_frame > e {
- let diff = self.duration_per_frame - e;
- sleep(diff);
- //println!("{} faster", diff.subsec_nanos() as f64 / 1e6);
- } else {
- //println!("{} slower", (e - duration_per_frame).subsec_nanos() as f64 / 1e6);
- }
- self.timer = Instant::now();
- //canvas.set_draw_color(Color::RGB(128, 128, 128));
- }
-}
-
-#[repr(C, packed)]
-struct INesHeader {
- magic: [u8; 4],
- prg_rom_nbanks: u8,
- chr_rom_nbanks: u8,
- flags6: u8,
- flags7: u8,
- prg_ram_nbanks: u8,
- flags9: u8,
- flags10: u8,
- padding: [u8; 5]
-}
-
-fn main() {
- let fname = std::env::args().nth(1).unwrap();
- let mut file = File::open(fname).unwrap();
- let mut rheader = [0; 16];
- println!("read {}", file.read(&mut rheader[..]).unwrap());
- let header = unsafe{transmute::<[u8; 16], INesHeader>(rheader)};
- let mirror = match ((header.flags6 >> 2) & 2) | (header.flags6 & 1) {
- 0 => MirrorType::Horizontal,
- 1 => MirrorType::Vertical,
- 2 => MirrorType::Single0,
- 3 => MirrorType::Single1,
- _ => MirrorType::Four,
- };
- let mapper_id = (header.flags7 & 0xf0) | (header.flags6 >> 4);
- println!("maigc:{} prg:{} chr:{} mirror:{} mapper:{}",
- std::str::from_utf8(&header.magic).unwrap(),
- header.prg_rom_nbanks,
- header.chr_rom_nbanks,
- mirror as u8,
- mapper_id);
- if header.flags6 & 0x04 == 0x04 {
- let mut trainer: [u8; 512] = unsafe{std::mem::uninitialized()};
- file.read(&mut trainer[..]).unwrap();
- println!("skipping trainer");
- }
-
- let prg_len = header.prg_rom_nbanks as usize * 0x4000;
- let mut chr_len = header.chr_rom_nbanks as usize * 0x2000;
- if chr_len == 0 {
- chr_len = 0x2000;
- }
- let mut prg_rom = Vec::<u8>::with_capacity(prg_len);
- let mut chr_rom = Vec::<u8>::with_capacity(chr_len);
- unsafe {
- prg_rom.set_len(prg_len);
- chr_rom.set_len(chr_len);
- }
- let sram = vec![0; 0x4000];
- println!("read prg {}", file.read(&mut prg_rom[..]).unwrap());
- /*
- for (i, v) in prg_rom.iter().enumerate() {
- print!("{:02x} ", v);
- if i & 15 == 15 {
- println!(" {:04x}", i);
- }
- }
- */
- println!("read chr {}", file.read(&mut chr_rom[..]).unwrap());
- /*
- for (i, v) in chr_rom.iter().enumerate() {
- print!("{:02x} ", v);
- if i & 15 == 15 {
- println!("");
- }
- }
- */
- let p1ctl = Joystick::new();
- let mut win = SDLWindow::new(&p1ctl);
- let mut m = match mapper_id {
- 0 | 2 => mapper::Mapper2::new(cartridge::Cartridge::new(chr_rom, prg_rom, sram, mirror)),
- _ => panic!("unsupported mapper {}", mapper_id)
- };
- let mt = m.get_cart().mirror_type;
- let mapper = RefCell::new(&mut m as &mut memory::VMem);
- let mut ppu = ppu::PPU::new(memory::PPUMemory::new(&mapper, mt), &mut win);
- let mut cpu = mos6502::CPU::new(memory::CPUMemory::new(&mut ppu, &mapper, Some(&p1ctl), None));
- let ptr = &mut cpu as *mut mos6502::CPU;
- cpu.mem.init(ptr);
- loop {
- cpu.step();
- while cpu.cycle > 0 {
- if ppu.tick() || ppu.tick() || ppu.tick() {
- cpu.trigger_delayed_nmi()
- }
- cpu.cycle -= 1;
- }
- }
-}
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