398 lines
14 KiB
TypeScript
398 lines
14 KiB
TypeScript
import { MasterAudio, WorkerSoundChannel } from "../common/audio";
|
|
import { MemoryBus } from "../common/baseplatform";
|
|
import { CPU6809 } from "../common/cpu/6809";
|
|
import { BasicScanlineMachine } from "../common/devices";
|
|
import { Keys, makeKeycodeMap, newAddressDecoder, newKeyboardHandler, padBytes } from "../common/emu";
|
|
|
|
const INITIAL_WATCHDOG = 8;
|
|
const SCREEN_HEIGHT = 304;
|
|
|
|
export class WilliamsMachine extends BasicScanlineMachine {
|
|
|
|
xtal = 12000000;
|
|
cpuFrequency = this.xtal / 3 / 4;
|
|
//cpuCyclesPerLine = 64;
|
|
cpuCyclesPerLine = 54; // TODO: becuse we swapped width and height
|
|
canvasWidth = 256;
|
|
numTotalScanlines = 304;
|
|
numVisibleScanlines = 304;
|
|
defaultROMSize = 0xc000;
|
|
rotate = -90;
|
|
sampleRate = 1;
|
|
|
|
cpu;
|
|
membus: MemoryBus;
|
|
ram = new Uint8Array(0xc000);
|
|
nvram = new Uint8Array(0x400);
|
|
rom = new Uint8Array(0xc000);
|
|
portsel = 0;
|
|
banksel = 0;
|
|
watchdog_counter = 0;
|
|
watchdog_enabled = false;
|
|
pia6821 = new Uint8Array(8);
|
|
blitregs = new Uint8Array(8);
|
|
|
|
worker: Worker;
|
|
master;
|
|
audioadapter;
|
|
|
|
palette = new Uint32Array(16);
|
|
screenNeedsRefresh = false;
|
|
displayPCs;
|
|
cpuScale = 1;
|
|
waitCycles = 0;
|
|
|
|
constructor(public isDefender: boolean) {
|
|
super();
|
|
this.palette.fill(0xff000000);
|
|
this.initBus(isDefender);
|
|
this.initInputs(isDefender);
|
|
this.initAudio();
|
|
this.initCPU();
|
|
}
|
|
|
|
initInputs(isDefender: boolean) {
|
|
var DEFENDER_KEYCODE_MAP = makeKeycodeMap([
|
|
[Keys.A, 4, 0x1],
|
|
[Keys.RIGHT, 4, 0x2],
|
|
[Keys.B, 4, 0x4],
|
|
[Keys.VK_X, 4, 0x8],
|
|
[Keys.P2_START, 4, 0x10],
|
|
[Keys.START, 4, 0x20],
|
|
[Keys.LEFT, 4, 0x40],
|
|
[Keys.DOWN, 4, 0x80],
|
|
[Keys.UP, 6, 0x1],
|
|
[Keys.SELECT, 0, 0x4],
|
|
[Keys.VK_7, 0, 0x1],
|
|
[Keys.VK_8, 0, 0x2],
|
|
[Keys.VK_9, 0, 0x8],
|
|
]);
|
|
|
|
var ROBOTRON_KEYCODE_MAP = makeKeycodeMap([
|
|
[Keys.P2_UP, 0, 0x1],
|
|
[Keys.P2_DOWN, 0, 0x2],
|
|
[Keys.P2_LEFT, 0, 0x4],
|
|
[Keys.P2_RIGHT, 0, 0x8],
|
|
[Keys.START, 0, 0x10],
|
|
[Keys.P2_START, 0, 0x20],
|
|
[Keys.UP, 0, 0x40],
|
|
[Keys.DOWN, 0, 0x80],
|
|
[Keys.LEFT, 2, 0x1],
|
|
[Keys.RIGHT, 2, 0x2],
|
|
[Keys.VK_7, 4, 0x1],
|
|
[Keys.VK_8, 4, 0x2],
|
|
[Keys.VK_6, 4, 0x4],
|
|
[Keys.VK_9, 4, 0x8],
|
|
[Keys.SELECT, 4, 0x10],
|
|
]);
|
|
|
|
var KEYCODE_MAP = isDefender ? DEFENDER_KEYCODE_MAP : ROBOTRON_KEYCODE_MAP;
|
|
//this.inputs.set(this.pia6821);
|
|
this.handler = newKeyboardHandler(this.pia6821, KEYCODE_MAP);
|
|
}
|
|
|
|
initBus(isDefender: boolean) {
|
|
var ioread_defender = newAddressDecoder([
|
|
[0x400, 0x5ff, 0x1ff, (a) => { return this.nvram[a]; }],
|
|
[0x800, 0x800, 0, (a) => { return this.scanline; }],
|
|
[0xc00, 0xc07, 0x7, (a) => { return this.pia6821[a]; }],
|
|
[0x0, 0xfff, 0, (a) => { /*console.log('ioread',hex(a));*/ }],
|
|
]);
|
|
|
|
var iowrite_defender = newAddressDecoder([
|
|
[0x0, 0xf, 0xf, this.setPalette.bind(this)],
|
|
[0x3fc, 0x3ff, 0, (a, v) => { if (v == 0x38) this.watchdog_counter = INITIAL_WATCHDOG; this.watchdog_enabled = true; }],
|
|
[0x400, 0x5ff, 0x1ff, (a, v) => { this.nvram[a] = v; }],
|
|
[0xc02, 0xc02, 0x1, (a, v) => { if (this.worker) this.worker.postMessage({ command: v & 0x3f }); }],
|
|
[0xc00, 0xc07, 0x7, (a, v) => { this.pia6821[a] = v; }],
|
|
[0x0, 0xfff, 0, (a, v) => { /* console.log('iowrite', hex(a), hex(v)); */ }],
|
|
]);
|
|
|
|
var memread_defender = newAddressDecoder([
|
|
[0x0000, 0xbfff, 0xffff, (a) => { return this.ram[a]; }],
|
|
[0xc000, 0xcfff, 0x0fff, (a) => {
|
|
switch (this.banksel) {
|
|
case 0: return ioread_defender(a);
|
|
case 1: return this.rom[a + 0x3000];
|
|
case 2: return this.rom[a + 0x4000];
|
|
case 3: return this.rom[a + 0x5000];
|
|
case 7: return this.rom[a + 0x6000];
|
|
default: return 0; // TODO: error light
|
|
}
|
|
}],
|
|
[0xd000, 0xffff, 0xffff, (a) => { return this.rom ? this.rom[a - 0xd000] : 0; }],
|
|
]);
|
|
|
|
var memwrite_defender = newAddressDecoder([
|
|
[0x0000, 0x97ff, 0, this.write_display_byte.bind(this)],
|
|
[0x9800, 0xbfff, 0, (a, v) => { this.ram[a] = v; }],
|
|
[0xc000, 0xcfff, 0x0fff, iowrite_defender.bind(this)],
|
|
[0xd000, 0xdfff, 0, (a, v) => { this.banksel = v & 0x7; }],
|
|
[0, 0xffff, 0, (a, v) => { /* console.log(hex(a), hex(v)); */ }],
|
|
]);
|
|
|
|
// Robotron, Joust, Bubbles, Stargate
|
|
|
|
var ioread_robotron = newAddressDecoder([
|
|
[0x804, 0x807, 0x3, (a) => { return this.pia6821[a]; }],
|
|
[0x80c, 0x80f, 0x3, (a) => { return this.pia6821[a + 4]; }],
|
|
[0xb00, 0xbff, 0, (a) => { return this.scanline; }],
|
|
[0xc00, 0xfff, 0x3ff, (a) => { return this.nvram[a]; }],
|
|
[0x0, 0xfff, 0, (a) => { /* console.log('ioread',hex(a)); */ }],
|
|
]);
|
|
|
|
var iowrite_robotron = newAddressDecoder([
|
|
[0x0, 0xf, 0xf, this.setPalette.bind(this)],
|
|
[0x80c, 0x80c, 0xf, (a, v) => { if (this.worker) this.worker.postMessage({ command: v }); }],
|
|
//[0x804, 0x807, 0x3, function(a,v) { console.log('iowrite',a); }], // TODO: sound
|
|
//[0x80c, 0x80f, 0x3, function(a,v) { console.log('iowrite',a+4); }], // TODO: sound
|
|
[0x900, 0x9ff, 0, (a, v) => { this.banksel = v & 0x1; }],
|
|
[0xa00, 0xa07, 0x7, this.setBlitter.bind(this)],
|
|
[0xbff, 0xbff, 0, (a, v) => { if (v == 0x39) { this.watchdog_counter = INITIAL_WATCHDOG; this.watchdog_enabled = true; } }],
|
|
[0xc00, 0xfff, 0x3ff, (a, v) => { this.nvram[a] = v; }],
|
|
//[0x0, 0xfff, 0, function(a,v) { console.log('iowrite',hex(a),hex(v)); }],
|
|
]);
|
|
|
|
var memread_robotron = newAddressDecoder([
|
|
[0x0000, 0x8fff, 0xffff, (a) => { return this.banksel ? this.rom[a] : this.ram[a]; }],
|
|
[0x9000, 0xbfff, 0xffff, (a) => { return this.ram[a]; }],
|
|
[0xc000, 0xcfff, 0x0fff, ioread_robotron],
|
|
[0xd000, 0xffff, 0xffff, (a) => { return this.rom ? this.rom[a - 0x4000] : 0; }],
|
|
]);
|
|
|
|
var memwrite_robotron = newAddressDecoder([
|
|
[0x0000, 0x97ff, 0, this.write_display_byte.bind(this)],
|
|
[0x9800, 0xbfff, 0, (a, v) => { this.ram[a] = v; }],
|
|
[0xc000, 0xcfff, 0x0fff, iowrite_robotron.bind(this)],
|
|
//[0x0000, 0xffff, 0, function(a,v) { console.log(hex(a), hex(v)); }],
|
|
]);
|
|
|
|
var memread_williams = isDefender ? memread_defender : memread_robotron;
|
|
var memwrite_williams = isDefender ? memwrite_defender : memwrite_robotron;
|
|
this.membus = {
|
|
read: memread_williams,
|
|
write: memwrite_williams,
|
|
};
|
|
this.membus = this.probeMemoryBus(this.membus);
|
|
this.readAddress = this.membus.read;
|
|
}
|
|
|
|
initAudio() {
|
|
this.master = new MasterAudio();
|
|
this.worker = new Worker("./src/common/audio/z80worker.js");
|
|
let workerchannel = new WorkerSoundChannel(this.worker);
|
|
this.master.master.addChannel(workerchannel);
|
|
}
|
|
|
|
initCPU() {
|
|
this.rom = new Uint8Array(this.defaultROMSize);
|
|
this.cpu = this.newCPU(this.membus);
|
|
//this.connectCPUMemoryBus(this);
|
|
}
|
|
|
|
newCPU(membus: MemoryBus) {
|
|
var cpu = Object.create(CPU6809());
|
|
cpu.init(membus.write, membus.read, 0);
|
|
return cpu;
|
|
}
|
|
|
|
readAddress;
|
|
|
|
// d1d6 ldu $11 / beq $d1ed
|
|
|
|
setPalette(a, v) {
|
|
// RRRGGGBB
|
|
var color = 0xff000000 | ((v & 7) << 5) | (((v >> 3) & 7) << 13) | (((v >> 6) << 22));
|
|
if (color != this.palette[a]) {
|
|
this.palette[a] = color;
|
|
this.screenNeedsRefresh = true;
|
|
}
|
|
}
|
|
|
|
write_display_byte(a: number, v: number) {
|
|
this.ram[a] = v;
|
|
this.drawDisplayByte(a, v);
|
|
if (this.displayPCs) this.displayPCs[a] = this.cpu.getPC(); // save program counter
|
|
}
|
|
|
|
drawDisplayByte(a, v) {
|
|
var ofs = ((a & 0xff00) << 1) | ((a & 0xff) ^ 0xff);
|
|
this.pixels[ofs] = this.palette[v >> 4];
|
|
this.pixels[ofs + 256] = this.palette[v & 0xf];
|
|
}
|
|
|
|
setBlitter(a, v) {
|
|
if (a) {
|
|
this.blitregs[a] = v;
|
|
} else {
|
|
var cycles = this.doBlit(v);
|
|
this.waitCycles -= cycles * this.cpuScale; // wait CPU cycles
|
|
}
|
|
}
|
|
|
|
doBlit(flags) {
|
|
//console.log(hex(flags), blitregs);
|
|
flags &= 0xff;
|
|
var offs = SCREEN_HEIGHT - this.blitregs[7];
|
|
var sstart = (this.blitregs[2] << 8) + this.blitregs[3];
|
|
var dstart = (this.blitregs[4] << 8) + this.blitregs[5];
|
|
var w = this.blitregs[6] ^ 4; // blitter bug fix
|
|
var h = this.blitregs[7] ^ 4;
|
|
if (w == 0) w++;
|
|
if (h == 0) h++;
|
|
if (h == 255) h++;
|
|
var sxinc = (flags & 0x1) ? 256 : 1;
|
|
var syinc = (flags & 0x1) ? 1 : w;
|
|
var dxinc = (flags & 0x2) ? 256 : 1;
|
|
var dyinc = (flags & 0x2) ? 1 : w;
|
|
var pixdata = 0;
|
|
for (var y = 0; y < h; y++) {
|
|
var source = sstart & 0xffff;
|
|
var dest = dstart & 0xffff;
|
|
for (var x = 0; x < w; x++) {
|
|
var data = this.membus.read(source);
|
|
if (flags & 0x20) {
|
|
pixdata = (pixdata << 8) | data;
|
|
this.blit_pixel(dest, (pixdata >> 4) & 0xff, flags);
|
|
} else {
|
|
this.blit_pixel(dest, data, flags);
|
|
}
|
|
source += sxinc;
|
|
source &= 0xffff;
|
|
dest += dxinc;
|
|
dest &= 0xffff;
|
|
}
|
|
if (flags & 0x2)
|
|
dstart = (dstart & 0xff00) | ((dstart + dyinc) & 0xff);
|
|
else
|
|
dstart += dyinc;
|
|
if (flags & 0x1)
|
|
sstart = (sstart & 0xff00) | ((sstart + syinc) & 0xff);
|
|
else
|
|
sstart += syinc;
|
|
}
|
|
return w * h * (2 + ((flags & 0x4) >> 2)); // # of memory accesses
|
|
}
|
|
|
|
blit_pixel(dstaddr, srcdata, flags) {
|
|
var curpix = dstaddr < 0xc000 ? this.ram[dstaddr] : this.membus.read(dstaddr);
|
|
var solid = this.blitregs[1];
|
|
var keepmask = 0xff; //what part of original dst byte should be kept, based on NO_EVEN and NO_ODD flags
|
|
//even pixel (D7-D4)
|
|
if ((flags & 0x8) && !(srcdata & 0xf0)) { //FG only and src even pixel=0
|
|
if (flags & 0x80) keepmask &= 0x0f; // no even
|
|
} else {
|
|
if (!(flags & 0x80)) keepmask &= 0x0f; // not no even
|
|
}
|
|
//odd pixel (D3-D0)
|
|
if ((flags & 0x8) && !(srcdata & 0x0f)) { //FG only and src odd pixel=0
|
|
if (flags & 0x40) keepmask &= 0xf0; // no odd
|
|
} else {
|
|
if (!(flags & 0x40)) keepmask &= 0xf0; // not no odd
|
|
}
|
|
curpix &= keepmask;
|
|
if (flags & 0x10) // solid bit
|
|
curpix |= (solid & ~keepmask);
|
|
else
|
|
curpix |= (srcdata & ~keepmask);
|
|
if (dstaddr < 0x9800) // can cause recursion otherwise
|
|
this.membus.write(dstaddr, curpix);
|
|
}
|
|
|
|
startScanline(): void {
|
|
this.audio && this.audioadapter && this.audioadapter.generate(this.audio);
|
|
// TODO: line-by-line
|
|
if (this.screenNeedsRefresh && this.scanline == 0) {
|
|
for (var i = 0; i < 0x9800; i++)
|
|
this.drawDisplayByte(i, this.ram[i]);
|
|
this.screenNeedsRefresh = false;
|
|
}
|
|
if (this.scanline == 0 && this.watchdog_enabled && this.watchdog_counter-- <= 0) {
|
|
console.log("WATCHDOG FIRED, PC =", this.cpu.getPC().toString(16)); // TODO: alert on video
|
|
// TODO: this.breakpointHit(cpu.T());
|
|
this.reset();
|
|
}
|
|
}
|
|
drawScanline(): void {
|
|
// interrupts happen every 1/4 of the screen
|
|
let sl = this.scanline;
|
|
if (sl == 0 || sl == 0x3c || sl == 0xbc || sl == 0xfc) {
|
|
if (!this.isDefender || this.pia6821[7] == 0x3c) { // TODO?
|
|
if (this.cpu.interrupt)
|
|
this.cpu.interrupt();
|
|
if (this.cpu.requestInterrupt)
|
|
this.cpu.requestInterrupt();
|
|
}
|
|
}
|
|
}
|
|
read(a: number): number {
|
|
return this.membus.read(a);
|
|
}
|
|
write(a: number, v: number): void {
|
|
this.membus.write(a, v);
|
|
}
|
|
readConst(a: number): number {
|
|
if (a >= 0xc000 && a <= 0xcbff) return 0xff;
|
|
else return this.membus.read(a); // TODO
|
|
}
|
|
reset() {
|
|
super.reset();
|
|
this.watchdog_counter = INITIAL_WATCHDOG;
|
|
this.watchdog_enabled = false;
|
|
this.banksel = 1;
|
|
}
|
|
|
|
loadSoundROM(data) {
|
|
console.log("loading sound ROM " + data.length + " bytes");
|
|
var soundrom = padBytes(data, 0x4000);
|
|
this.worker.postMessage({ rom: soundrom });
|
|
}
|
|
|
|
loadROM(data) {
|
|
if (data.length > 2) {
|
|
if (this.isDefender) {
|
|
this.loadSoundROM(data.slice(0x6800));
|
|
data = this.rom.slice(0, 0x6800);
|
|
} else if (data.length > 0xc000) {
|
|
this.loadSoundROM(data.slice(0xc000));
|
|
data = this.rom.slice(0, 0xc000);
|
|
} else if (data.length > 0x9000 && data[0x9000]) {
|
|
this.loadSoundROM(data.slice(0x9000));
|
|
}
|
|
data = padBytes(data, 0xc000);
|
|
}
|
|
super.loadROM(data);
|
|
}
|
|
|
|
loadState(state) {
|
|
this.cpu.loadState(state.c);
|
|
this.ram.set(state.ram);
|
|
this.nvram.set(state.nvram);
|
|
this.pia6821.set(state.inputs);
|
|
this.blitregs.set(state.blt);
|
|
this.watchdog_counter = state.wdc;
|
|
this.banksel = state.bs;
|
|
this.portsel = state.ps;
|
|
}
|
|
saveState() {
|
|
return {
|
|
c: this.cpu.saveState(),
|
|
ram: this.ram.slice(0),
|
|
nvram: this.nvram.slice(0),
|
|
inputs: this.pia6821.slice(0),
|
|
blt: this.blitregs.slice(0),
|
|
wdc: this.watchdog_counter,
|
|
bs: this.banksel,
|
|
ps: this.portsel,
|
|
};
|
|
}
|
|
loadControlsState(state) {
|
|
this.pia6821.set(state.inputs);
|
|
}
|
|
saveControlsState() {
|
|
return {
|
|
inputs: this.pia6821.slice(0),
|
|
};
|
|
}
|
|
}
|