bokuweb

lazy_static! {
        
        pub static ref MAP: HashMap<u8, Opecode> = {         
            let mut m = HashMap::new();
            m.insert(0xA9, Opecode { name: Instruction::LDA, mode: Addressing::Immediate, cycle: cycles[0xA9] });
            m.insert(0xA5, Opecode { name: Instruction::LDA, mode: Addressing::ZeroPage, cycle: cycles[0xA5] });
            m.insert(0xB5, Opecode { name: Instruction::LDA, mode: Addressing::ZeroPageX, cycle: cycles[0xB5] });
            m.insert(0xAD, Opecode { name: Instruction::LDA, mode: Addressing::Absolute, cycle: cycles[0xAD] });
            // ...
        }

bokuweb

pub fn run<T: CpuRegisters + Debug, U: CpuBus>(registers: &mut T, bus: &mut U) -> Data {
 let _code = fetch(registers, bus);
 let ref map = opecode::MAP;
 let code = &*map.get(&_code).unwrap();
 let opeland = fetch_opeland(&code, registers, bus);
 match code.name {
 Instruction::LDA if code.mode == Addressing::Immediate => lda_imm(opeland, registers),
 Instruction::LDA => lda(opeland, registers, bus),
 Instruction::LDX if code.mode == Addressing::Immediate => ldx_imm(opeland, registers),
 Instruction::LDX => ldx(opeland, registers, bus),

bokuweb

#[derive(Debug)]
struct Status {
 negative: bool,
 overflow: bool,
 reserved: bool,
 break_mode: bool,
 decimal_mode: bool,
 interrupt: bool,
 zero: bool,
 carry: bool,

bokuweb

build:
 cargo rustc — release \
 — target=wasm32-unknown-emscripten — \
 -C opt-level=3 \
 -C link-args=”-O3 -s NO_EXIT_RUNTIME=1 -s EXPORTED_FUNCTIONS=[‘_run’]”

bokuweb

mergeInto(LibraryManager.library, {
  canvas_render: function (ptr, len) {
    Module.NES.buf = new Uint8Array(Module.HEAPU8.buffer, ptr, len);
    Module.NES.image.data.set(Module.NES.buf);
    Module.NES.ctx.putImageData(Module.NES.image, 0, 0);
  }
}

bokuweb

mod color;

use super::{BackgroundField, BackgroundCtx};
use super::PaletteList;
use super::{Sprite, SpritesWithCtx, SpritePosition};
use self::color::COLORS;

extern "C" {
    fn canvas_render(ptr: *const u8, len: usize);
}

bokuweb

bokuweb

bokuweb

<script src="./gpu.js" type="text/javascript"></script>
<script>
    const gpu = new GPU();
    const n = 512;
    const matMul = gpu.createKernel(function (a, b) {
        var sum = 0;
        for (var i = 0; i < this.constants.size; i++) {
            if (false) {
                sum += a[i] + b[i] * 2;
            } else {

bokuweb

#include <stdio.h>
#include <stdlib.h>
#include <emscripten.h>

void onLoadCallback(const char *filename) {
    FILE *fp;
    char s[256];

    if((fp = fopen(filename, "r")) == NULL) {
        printf("file open error!!\n");