From cf7807945c4f6571efea9f6f252a0d77331cffda Mon Sep 17 00:00:00 2001 From: rick Date: Wed, 9 Feb 2022 02:52:30 +0100 Subject: [PATCH] feat: interpreter (not all instructions) --- Cargo.toml | 2 +- src/main.rs | 506 +++++++++++++++++++++++++++++++++++++++++++++------- 2 files changed, 439 insertions(+), 69 deletions(-) diff --git a/Cargo.toml b/Cargo.toml index e23b384..058903c 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -6,5 +6,5 @@ edition = "2021" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [dependencies] - +rand = "0.8.4" sdl2 = "0.35.1" diff --git a/src/main.rs b/src/main.rs index f5a7238..14d146a 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,16 +1,23 @@ extern crate sdl2; +extern crate rand; use sdl2::pixels::Color; +#[allow(unused_imports)] use sdl2::event::Event; +use sdl2::EventPump; +#[allow(unused_imports)] use sdl2::keyboard::Keycode; use sdl2::video::Window; +use sdl2::rect::Point; +use sdl2::render::Canvas; use std::fs::File; use std::path::Path; use std::io; use std::io::Read; -const font: [u8; 80] = [ + +const FONT: [u8; 80] = [ 0xF0, 0x90, 0x90, 0x90, 0xF0, 0x20, 0x60, 0x20, 0x20, 0x70, 0xF0, 0x10, 0xF0, 0x80, 0xF0, @@ -29,40 +36,40 @@ const font: [u8; 80] = [ 0xF0, 0x80, 0xF0, 0x80, 0x80 ]; +const HEIGHT: usize = 32; +const WIDTH: usize = 64; + +#[allow(dead_code)] struct Machine { memory: [u8; 4096], key_inputs: [i32; 16], - display_buffer: [[i32; 64]; 32], - gpio: [i8; 16], - index: i16, - opcode: u16, + display_buffer: [[i32; WIDTH]; HEIGHT], + gpio: [u8; 16], + index: u16, + //opcode: u16, pc: usize, - stack: Vec -} - -fn decodeOp(op1: u8, op2: u8) -> u16 { - let ret: u16 = u16::from(op1) << 2; - ret + u16::from(op2) >> 2 + stack: Vec } +#[allow(non_snake_case, unused_variables)] impl Machine { /// Initialise une machine en mettant tout à 0 (RAM, PC...) pub fn new() -> Self { - Machine { + Self { memory: [0; 4096], key_inputs: [0; 16], - display_buffer: [[0; 64]; 32], + display_buffer: [[0; WIDTH]; HEIGHT], gpio: [0; 16], index: 0, - opcode: 0, + //opcode: 0, pc: 0, stack: Vec::new(), } } pub fn init(&mut self) { - for i in 0..font.len() { - self.memory[i] = font[i]; + for i in 0..FONT.len() { + self.memory[i] = FONT[i]; } self.pc = 0x200; @@ -81,93 +88,340 @@ impl Machine { Ok(()) } - pub fn cycle(&mut self, screen: &mut sdl2::render::Canvas) { - self.opcode = ((self.memory[self.pc] as u16) << 8) + pub fn cycle(&mut self, screen: &mut Canvas, events: &mut EventPump) { + let opcode = ((self.memory[self.pc] as u16) << 8) + (self.memory[self.pc + 1] as u16); - self.pc += 2; - //let o = self.opcode & 0xf000; + let vx: usize = ((opcode & 0x0f00) >> 8) as usize; + let vy: usize = ((opcode & 0x00f0) >> 4) as usize; + let k: u8 = (opcode & 0x00ff) as u8; - match (self.opcode & 0xf000) >> 12 { - 0 => match self.opcode { - 0x00E0 => screen.clear(), - 0x00EE => println!("RET"), + self.pc += 2; + + match (opcode & 0xf000) >> 12 { + 0 => match opcode { + 0x00E0 => { + self.display_buffer = [[0; 64]; 32]; + screen.set_draw_color(Color::RGB(0, 0, 0)); + screen.clear(); + screen.present(); + }, + 0x00EE => self.pc = self.stack.pop().unwrap() as usize, _ => println!("SYS"), } - 1 => println!("JP"), - 2 => println!("CALL"), - 3 => println!("SE"), - 4 => println!("SNE"), - 5 => println!("SE 5"), - 6 => println!("LD"), - 7 => println!("ADD"), + 1 => self.pc = (opcode & 0x0fff) as usize, + 2 => { + self.stack.push(self.pc as u16); + self.pc = (opcode & 0x0fff) as usize + }, + 3 => if self.gpio[vx] == k as u8 { + self.pc += 2; + }, + 4 => if self.gpio[vx] != k as u8 { + self.pc += 2; + }, + 5 => if self.gpio[vx] == self.gpio[vy] { + self.pc += 2; + } + 6 => self.gpio[vx] = k, + 7 => self.gpio[vx] = self.gpio[vx].saturating_add(k), 8 => { - let x = (self.opcode & 0x0f00) >> 8; - let y = (self.opcode & 0x00f0) >> 4; - match self.opcode & 0x000f { - 0 => println!("LD 8"), - 1 => println!("OR"), - 2 => println!("AND"), - 3 => println!("XOR"), - 4 => println!("ADD"), - 5 => println!("SUB"), - 6 => println!("SHR"), - 7 => println!("SUBN"), - 0xE => println!("SHL"), + //let x = (opcode & 0x0f00) >> 8; + //let y = (opcode & 0x00f0) >> 4; + match opcode & 0x000f { + 0 => self.gpio[vx] = self.gpio[vy], + 1 => self.gpio[vx] |= self.gpio[vy], + 2 => self.gpio[vx] &= self.gpio[vy], + 3 => self.gpio[vx] ^= self.gpio[vy], + 4 => { + self.gpio[vx] = self.gpio[vx].saturating_add(self.gpio[vy]); + let (_, overflow) = self.gpio[vx].overflowing_add(self.gpio[vy]); + if overflow { + self.gpio[0xf] = 1; + } + }, + 5 => { + if self.gpio[vx] > self.gpio[vy] { + self.gpio[0xf] = 1; + } else { + self.gpio[0xf] = 0; + } + + self.gpio[vx] -= self.gpio[vy]; + }, + 6 => { + if self.gpio[vx].trailing_ones() > 0 { + self.gpio[0xf] = 1; + } else { + self.gpio[0xf] = 0; + } + + self.gpio[vx] >>= 1; + }, + 7 => { + if self.gpio[vx] < self.gpio[vy] { + self.gpio[0xf] = 1; + } else { + self.gpio[0xf] = 0; + } + + self.gpio[vx] = self.gpio[vy] - self.gpio[vx]; + }, + 0xE => { + if self.gpio[vx].leading_ones() > 0 { + self.gpio[0xf] = 1; + } else { + self.gpio[0xf] = 0; + } + + self.gpio[vx] <<= 1; + }, _ => println!("error 8") } } - 9 => println!("SNE 9"), - 0xA => println!("LD A"), - 0xB => println!("JP B"), - 0xC => println!("RND "), - 0xD => println!("DRW"), + 9 => if self.gpio[vx] != self.gpio[vy] { + self.pc += 2; + }, + 0xA => self.index = opcode & 0x0fff, + 0xB => self.pc = ((self.gpio[0]) as u16 + (opcode & 0x0fff)) as usize, + 0xC => self.gpio[vx] = rand::random::() & k, + 0xD => { + let x = self.gpio[vx] as u16; + let y = self.gpio[vy] as u16; + for i in 0..(opcode & 0x000f) { + //println!("{:?}", self.memory); + let mut sprite = self.memory[(self.index + i as u16) as usize]; + for j in 0..8 { + let mut case = 0; + if sprite.leading_ones() > 0 { case = 1; } + //println!("I :: {}", self.index + i); + //println!("D :: {} - {}", sprite, case); + sprite = sprite << 1; + + let ty: usize = (i + y) as usize % HEIGHT; + let tx: usize = (j + x) as usize % WIDTH; + + let tmp = self.display_buffer[ty][tx]; + self.display_buffer[ty][tx] ^= case; + if self.display_buffer[ty][tx] == 0 && tmp == 1 { + self.gpio[0xf] = 1; + } + } + } + }, 0xE => { - let x = (self.opcode & 0x0f00) >> 8; - match self.opcode & 0x00ff { - 0x9E => println!("SKP"), - 0xA1 => println!("SKNP"), + let x = (opcode & 0x0f00) >> 8; + match opcode & 0x00ff { + 0x9E => { + if self.key_inputs[self.gpio[vx] as usize] == 1 { + self.pc += 2; + } + }, + 0xA1 => { + if self.key_inputs[self.gpio[vx] as usize] == 0 { + self.pc += 2; + } + }, _ => println!("error E") } } 0xF => { - let x = (self.opcode & 0x0f00) >> 8; - match self.opcode & 0x00ff { + let x = (opcode & 0x0f00) >> 8; + match opcode & 0x00ff { 0x07 => println!("LD F 7"), - 0x0A => println!("LD F A"), + 0x0A => self.check_touch(vx, events), 0x15 => println!("LD F 15"), 0x18 => println!("LD F 18"), - 0x1E => println!("ADD F 1E"), - 0x29 => println!("LD F 2"), // self.index = self.gpio[x] * 5) & 0x0fff + 0x1E => self.index += self.gpio[vx] as u16, + 0x29 => self.index = (self.gpio[vx] as u16) * 5, // self.index = self.gpio[x] * 5) & 0x0fff 0x33 => println!("LD F 3"), - 0x55 => println!("LD F 5"), - 0x65 => println!("LD F 6"), + 0x55 => + { + //let mut j: usize = self.index as usize; + for i in 0..(vx + 1) { + self.memory[(self.index as usize) + i] = self.gpio[i]; + //j += 1; + } + }, + 0x65 => { + //let mut j: usize = self.index as usize; + for i in 0..(vx+1) { + self.gpio[i] = self.memory[(self.index as usize) + i]; + //j += 1; + } + }, _ => println!("error F") } } _ => println!("error") } } + + fn check_touch(&mut self, vx: usize, events: &mut EventPump) { + let touch = events.wait_event(); + match touch { + Event::KeyDown { keycode: Some(Keycode::Num0), .. } => { + self.gpio[vx] = 0; + }, + Event::KeyDown { keycode: Some(Keycode::Num1), .. } => { + self.gpio[vx] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num2), .. } => { + self.gpio[vx] = 2; + }, + Event::KeyDown { keycode: Some(Keycode::Num3), .. } => { + self.gpio[vx] = 3; + }, + Event::KeyDown { keycode: Some(Keycode::Num4), .. } => { + self.gpio[vx] = 4; + }, + Event::KeyDown { keycode: Some(Keycode::Num5), .. } => { + self.gpio[vx] = 5; + }, + Event::KeyDown { keycode: Some(Keycode::Num6), .. } => { + self.gpio[vx] = 6; + }, + Event::KeyDown { keycode: Some(Keycode::Num7), .. } => { + self.gpio[vx] = 7; + }, + Event::KeyDown { keycode: Some(Keycode::Num8), .. } => { + self.gpio[vx] = 8; + }, + Event::KeyDown { keycode: Some(Keycode::Num9), .. } => { + self.gpio[vx] = 9; + }, + Event::KeyDown { keycode: Some(Keycode::A), .. } => { + self.gpio[vx] = 0xa; + }, + Event::KeyDown { keycode: Some(Keycode::B), .. } => { + self.gpio[vx] = 0xb; + }, + Event::KeyDown { keycode: Some(Keycode::C), .. } => { + self.gpio[vx] = 0xc; + }, + Event::KeyDown { keycode: Some(Keycode::D), .. } => { + self.gpio[vx] = 0xd; + }, + Event::KeyDown { keycode: Some(Keycode::E), .. } => { + self.gpio[vx] = 0xe; + }, + Event::KeyDown { keycode: Some(Keycode::F), .. } => { + self.gpio[vx] = 0xf; + }, + _ => self.check_touch(vx, events), + } + } } +fn read_file(p: &Path) -> io::Result<()> { + let mut buffer = Vec::new(); + let mut f = File::open(p)?; + let mut mem = [0; 4096]; + f.read_to_end(&mut buffer)?; + + for i in 0..buffer.len() { + mem[i] = buffer[i]; + } + + println!("{:?}", mem); + + let mut i = 0; + while i < mem.len() { + let opcode = ((mem[i] as u16) << 8) + + (mem[i + 1] as u16); + + let vx: usize = ((opcode & 0x0f00) >> 8) as usize; + let vy: usize = ((opcode & 0x00f0) >> 4) as usize; + let k: u8 = (opcode & 0x00ff) as u8; + + i += 2; + + match (opcode & 0xf000) >> 12 { + 0 => match opcode { + 0x00E0 => println!("CLS"), + 0x00EE => println!("RET"), + _ => println!("SYS"), + } + 1 => println!("JP {}", opcode & 0x0fff), + 2 => println!("CALL {}", opcode & 0x0fff), + 3 => println!("3SE {} {}", vx, k), + 4 => println!("4SNE {} {}", vx, k), + 5 => println!("5SE {} {}", vx, vy), + 6 => println!("6LD {} {}", vx, k), + 7 => println!("7ADD {} {}", vx, k), + 8 => { + //let x = (opcode & 0x0f00) >> 8; + //let y = (opcode & 0x00f0) >> 4; + match opcode & 0x000f { + 0 => println!("8LD {} {}", vx, vy), + 1 => println!("8OR {} {}", vx, vy), + 2 => println!("8AND {} {}", vx, vy), + 3 => println!("8XOR {} {}", vx, vy), + 4 => println!("8ADD {} {}", vx, vy), + 5 => println!("8SUB {} {}", vx, vy), + 6 => println!("8SHR {} {}", vx, vy), + 7 => println!("8SUBN {} {}", vx, vy), + 0xE => println!("8SHL {} {}", vx, vy), + _ => println!("error 8") + } + } + 9 => println!("9SNE {} {}", vx, vy), + 0xA => println!("AADD I {}", opcode & 0x0fff), + 0xB => println!("BJP 0 {}", opcode & 0x0fff), + 0xC => println!("RND {} {}", vx, k), + 0xD => println!("DRW {} {} {}", vx, vy, opcode & 0x000f), + 0xE => { + let x = (opcode & 0x0f00) >> 8; + match opcode & 0x00ff { + 0x9E => println!("SKP {}", vx), + 0xA1 => println!("SKNP {}", vx), + _ => println!("error E") + } + } + 0xF => { + let x = (opcode & 0x0f00) >> 8; + match opcode & 0x00ff { + 0x07 => println!("FLD {} DT", vx), + 0x0A => println!("FLD {} K", vx), + 0x15 => println!("FLD DT {}", vx), + 0x18 => println!("FLD ST {}", vx), + 0x1E => println!("FADD I {}", vx), + 0x29 => println!("FLD F {}", vx), + 0x33 => println!("FLD B {}", vx), + 0x55 => println!("FLD [I] {}", vx), + 0x65 => println!("FLD {} [I]", vx), + _ => println!("error F") + } + } + _ => println!("error") + } + } + + Ok(()) +} + +#[allow(unused_mut, unused_must_use, unused_labels, unused_variables)] fn main() { + //read_file(Path::new("15PUZZLE")); + //return; let mut t : Machine = Machine::new(); - println!("{:?}", t.memory); + //println!("{:?}", t.memory); t.init(); - t.loadRom(Path::new("15PUZZLE")); - println!("\n\n{:?}", t.memory); - //t.cycle(); + //t.loadRom(Path::new("15PUZZLE")); + t.loadRom(Path::new("BLITZ")); + + //println!("\n\n{:?}", t.memory); let sdl_context = sdl2::init().unwrap(); let video_subsystem = sdl_context.video().unwrap(); - let window = video_subsystem.window("Chip8 Emulator", 900, 700) + let window = video_subsystem.window("Chip8 Emulator", WIDTH as u32, HEIGHT as u32) .position_centered() .build() .unwrap(); let mut canvas = window.into_canvas().build().unwrap(); - canvas.set_draw_color(Color::RGB(0, 255, 255)); + canvas.set_draw_color(Color::RGB(0, 0, 0)); canvas.clear(); canvas.present(); @@ -180,18 +434,134 @@ fn main() { canvas.set_draw_color(Color::RGB(i, 64, 255 - i)); canvas.clear(); */ - t.cycle(&mut canvas); - /* + t.cycle(&mut canvas, &mut event_pump); + + //canvas.set_draw_color(Color::RGB(0, 0, 0)); + //canvas.clear(); + //println!("{:?}", t.memory); + + canvas.set_draw_color(Color::RGB(255, 255, 255)); + + //println!("{:?}", t.display_buffer); + //println!("\n===\n"); + + for i in 0..t.display_buffer.len() { + for j in 0..t.display_buffer[i].len() { + if t.display_buffer[i][j] == 1 { + canvas.draw_point(Point::new(j as i32, i as i32)); + } + } + } + + //canvas.draw_line(Point::new(10, 10), Point::new(20,20)); + //canvas.draw_point(Point::new(10, 10)); + for event in event_pump.poll_iter() { match event { Event::KeyDown { keycode: Some(Keycode::Escape), ..} => { break 'running }, + Event::KeyDown { keycode: Some(Keycode::Num0), .. } => { + t.key_inputs[0] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num1), .. } => { + t.key_inputs[1] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num2), .. } => { + t.key_inputs[2] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num3), .. } => { + t.key_inputs[3] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num4), .. } => { + t.key_inputs[4] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num5), .. } => { + t.key_inputs[5] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num6), .. } => { + t.key_inputs[6] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num7), .. } => { + t.key_inputs[7] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num8), .. } => { + t.key_inputs[8] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::Num9), .. } => { + t.key_inputs[9] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::A), .. } => { + t.key_inputs[0xa] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::B), .. } => { + t.key_inputs[0xb] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::C), .. } => { + t.key_inputs[0xc] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::D), .. } => { + t.key_inputs[0xd] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::E), .. } => { + t.key_inputs[0xe] = 1; + }, + Event::KeyDown { keycode: Some(Keycode::F), .. } => { + t.key_inputs[0xf] = 1; + }, + Event::KeyUp { keycode: Some(Keycode::Num0), .. } => { + t.key_inputs[0] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num1), .. } => { + t.key_inputs[1] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num2), .. } => { + t.key_inputs[2] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num3), .. } => { + t.key_inputs[3] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num4), .. } => { + t.key_inputs[4] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num5), .. } => { + t.key_inputs[5] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num6), .. } => { + t.key_inputs[6] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num7), .. } => { + t.key_inputs[7] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num8), .. } => { + t.key_inputs[8] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::Num9), .. } => { + t.key_inputs[9] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::A), .. } => { + t.key_inputs[0xa] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::B), .. } => { + t.key_inputs[0xb] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::C), .. } => { + t.key_inputs[0xc] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::D), .. } => { + t.key_inputs[0xd] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::E), .. } => { + t.key_inputs[0xe] = 0; + }, + Event::KeyUp { keycode: Some(Keycode::F), .. } => { + t.key_inputs[0xf] = 0; + }, + _ => {} } } - */ canvas.present(); }