apple1js/js/cards/aci.ts
2023-12-18 12:04:20 -08:00

175 lines
4.7 KiB
TypeScript

import {CPU6502, byte} from '@whscullin/cpu6502';
import {debug} from '../util';
// prettier-ignore
const rom = [
0xA9,0xAA,0x20,0xEF,0xFF,0xA9,0x8D,0x20,
0xEF,0xFF,0xA0,0xFF,0xC8,0xAD,0x11,0xD0,
0x10,0xFB,0xAD,0x10,0xD0,0x99,0x00,0x02,
0x20,0xEF,0xFF,0xC9,0x9B,0xF0,0xE1,0xC9,
0x8D,0xD0,0xE9,0xA2,0xFF,0xA9,0x00,0x85,
0x24,0x85,0x25,0x85,0x26,0x85,0x27,0xE8,
0xBD,0x00,0x02,0xC9,0xD2,0xF0,0x56,0xC9,
0xD7,0xF0,0x35,0xC9,0xAE,0xF0,0x27,0xC9,
0x8D,0xF0,0x20,0xC9,0xA0,0xF0,0xE8,0x49,
0xB0,0xC9,0x0A,0x90,0x06,0x69,0x88,0xC9,
0xFA,0x90,0xAD,0x0A,0x0A,0x0A,0x0A,0xA0,
0x04,0x0A,0x26,0x24,0x26,0x25,0x88,0xD0,
0xF8,0xF0,0xCC,0x4C,0x1A,0xFF,0xA5,0x24,
0x85,0x26,0xA5,0x25,0x85,0x27,0xB0,0xBF,
0xA9,0x40,0x20,0xCC,0xC1,0x88,0xA2,0x00,
0xA1,0x26,0xA2,0x10,0x0A,0x20,0xDB,0xC1,
0xD0,0xFA,0x20,0xF1,0xC1,0xA0,0x1E,0x90,
0xEC,0xA6,0x28,0xB0,0x98,0x20,0xBC,0xC1,
0xA9,0x16,0x20,0xCC,0xC1,0x20,0xBC,0xC1,
0xA0,0x1F,0x20,0xBF,0xC1,0xB0,0xF9,0x20,
0xBF,0xC1,0xA0,0x3A,0xA2,0x08,0x48,0x20,
0xBC,0xC1,0x68,0x2A,0xA0,0x39,0xCA,0xD0,
0xF5,0x81,0x26,0x20,0xF1,0xC1,0xA0,0x35,
0x90,0xEA,0xB0,0xCD,0x20,0xBF,0xC1,0x88,
0xAD,0x81,0xC0,0xC5,0x29,0xF0,0xF8,0x85,
0x29,0xC0,0x80,0x60,0x86,0x28,0xA0,0x42,
0x20,0xE0,0xC1,0xD0,0xF9,0x69,0xFE,0xB0,
0xF5,0xA0,0x1E,0x20,0xE0,0xC1,0xA0,0x2C,
0x88,0xD0,0xFD,0x90,0x05,0xA0,0x2F,0x88,
0xD0,0xFD,0xBC,0x00,0xC0,0xA0,0x29,0xCA,
0x60,0xA5,0x26,0xC5,0x24,0xA5,0x27,0xE5,
0x25,0xE6,0x26,0xD0,0x02,0xE6,0x27,0x60
] as const;
export interface ACICallback {
progress: (value: number) => void;
}
export default class ACI {
_last: number;
_next: number;
_recording = false;
_readOffset = 0;
_flip = false;
_beKind = false;
_progress = 0;
constructor(
private cpu: CPU6502,
private cb: ACICallback,
) {
this._last = cpu.getCycles();
this._next = this._last;
}
start() {
return 0xc0;
}
end() {
return 0xc1;
}
read(page: byte, off: byte) {
const now = this.cpu.getCycles();
let result = rom[off];
if (page === 0xc0) {
if (this._recording) {
const delta = now - this._last;
this.buffer.push(delta);
this._last = now;
} else {
if (this._readOffset < this.buffer.length) {
if (now > this._next) {
if (this._readOffset % 1000 === 0) {
debug('Read ' + this._readOffset / 1000);
}
this._flip = !this._flip;
this._next = now + this.buffer[this._readOffset++];
}
}
result = this._flip ? rom[off | 0x01] : rom[off & 0xfe];
const progress =
Math.round((this._readOffset / this.buffer.length) * 100) / 100;
if (this._progress !== progress) {
this._progress = progress;
this.cb.progress(this._progress);
}
}
} else {
if (this.cpu.getSync()) {
switch (off) {
case 0x00:
this._recording = false;
this._beKind = true;
debug('Entering ACI CLI');
break;
case 0x63:
if (this._recording) {
this.buffer.push(5000000);
this._recording = false;
}
debug('Exiting ACI CLI');
break;
case 0x70: // WRITE
this._recording = true;
if (this._beKind) {
this._beKind = false;
this.buffer = [];
}
debug('Start write');
this._last = now;
break;
//case 0x7c: // WBITLOOP:
// _debug = true;
// debug("Write bit loop");
// break;
case 0x8d: // READ
this._recording = false;
debug('Start read');
if (this._beKind) {
this._readOffset = 0;
this._next = now + 5000000;
this._beKind = false;
this.cb.progress(0);
}
break;
default:
break;
}
}
}
return result;
}
write() {}
getState() {
return {};
}
setState() {}
setData(data: number[][]) {
let seg, idx, jdx, d, b;
this.buffer = [];
for (seg = 0; seg < data.length; seg++) {
for (idx = 0; idx < 16384; idx++) {
this.buffer.push(592);
}
this.buffer.push(180);
this.buffer.push(238);
d = data[seg];
for (idx = 0; idx < d.length; idx++) {
b = d[idx];
for (jdx = 0; jdx < 8; jdx++) {
if (b & 0x80) {
this.buffer.push(473);
this.buffer.push(473);
} else {
this.buffer.push(238);
this.buffer.push(238);
}
b <<= 1;
}
}
this.buffer.push(5000000);
}
}
buffer: byte[] = [];
}