mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-18 03:05:35 +00:00
395 lines
16 KiB
JavaScript
395 lines
16 KiB
JavaScript
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.GalaxianScrambleMachine = exports.GalaxianMachine = void 0;
|
|
const ZilogZ80_1 = require("../common/cpu/ZilogZ80");
|
|
const devices_1 = require("../common/devices");
|
|
const emu_1 = require("../common/emu");
|
|
const audio_1 = require("../common/audio");
|
|
const GALAXIAN_KEYCODE_MAP = (0, emu_1.makeKeycodeMap)([
|
|
[emu_1.Keys.A, 0, 0x10],
|
|
[emu_1.Keys.LEFT, 0, 0x4],
|
|
[emu_1.Keys.RIGHT, 0, 0x8],
|
|
[emu_1.Keys.P2_A, 1, 0x10],
|
|
[emu_1.Keys.P2_LEFT, 1, 0x4],
|
|
[emu_1.Keys.P2_RIGHT, 1, 0x8],
|
|
[emu_1.Keys.SELECT, 0, 0x1],
|
|
[emu_1.Keys.START, 1, 0x1],
|
|
[emu_1.Keys.VK_2, 1, 0x2],
|
|
]);
|
|
const SCRAMBLE_KEYCODE_MAP = (0, emu_1.makeKeycodeMap)([
|
|
[emu_1.Keys.UP, 0, -0x1],
|
|
[emu_1.Keys.B, 0, -0x2],
|
|
[emu_1.Keys.VK_7, 0, -0x4],
|
|
[emu_1.Keys.A, 0, -0x8],
|
|
[emu_1.Keys.RIGHT, 0, -0x10],
|
|
[emu_1.Keys.LEFT, 0, -0x20],
|
|
[emu_1.Keys.VK_6, 0, -0x40],
|
|
[emu_1.Keys.SELECT, 0, -0x80],
|
|
[emu_1.Keys.START, 1, -0x80],
|
|
[emu_1.Keys.VK_2, 1, -0x40],
|
|
[emu_1.Keys.DOWN, 2, -0x40],
|
|
//[Keys.VK_UP, 2, -0x10],
|
|
]);
|
|
const bitcolors = [
|
|
0x000021, 0x000047, 0x000097,
|
|
0x002100, 0x004700, 0x009700,
|
|
0x510000, 0xae0000 // blue
|
|
];
|
|
const GalaxianVideo = function (rom, vram, oram, palette, options) {
|
|
var gfxBase = options.gfxBase || 0x2800;
|
|
this.missileWidth = options.missileWidth || 4;
|
|
this.missileOffset = options.missileOffset || 0;
|
|
this.showOffscreenObjects = false;
|
|
this.frameCounter = 0;
|
|
this.starsEnabled = 0;
|
|
var stars = [];
|
|
for (var i = 0; i < 256; i++)
|
|
stars[i] = (0, emu_1.noise)();
|
|
this.advanceFrame = function () {
|
|
this.frameCounter = (this.frameCounter + 1) & 0xff;
|
|
};
|
|
this.drawScanline = function (pixels, sl) {
|
|
var pixofs = sl * 264;
|
|
// hide offscreen on left + right (b/c rotated)
|
|
if (!this.showOffscreenObjects && (sl < 16 || sl >= 240)) {
|
|
for (var i = 0; i < 264; i++)
|
|
pixels[pixofs + i] = 0xff000000;
|
|
return; // offscreen
|
|
}
|
|
// draw tiles
|
|
var outi = pixofs; // starting output pixel in frame buffer
|
|
for (var xx = 0; xx < 32; xx++) {
|
|
var xofs = xx;
|
|
var scroll = oram[xofs * 2]; // even entries control scroll position
|
|
var attrib = oram[xofs * 2 + 1]; // odd entries control the color base
|
|
var sl2 = (sl + scroll) & 0xff;
|
|
var vramofs = (sl2 >> 3) << 5; // offset in VRAM
|
|
var yy = sl2 & 7; // y offset within tile
|
|
var tile = vram[vramofs + xofs]; // TODO: why undefined?
|
|
var color0 = (attrib & 7) << 2;
|
|
var addr = gfxBase + (tile << 3) + yy;
|
|
var data1 = rom[addr];
|
|
var data2 = rom[addr + 0x800];
|
|
for (var i = 0; i < 8; i++) {
|
|
var bm = 128 >> i;
|
|
var color = color0 + ((data1 & bm) ? 1 : 0) + ((data2 & bm) ? 2 : 0);
|
|
pixels[outi] = palette[color];
|
|
outi++;
|
|
}
|
|
}
|
|
// draw sprites
|
|
for (var sprnum = 7; sprnum >= 0; sprnum--) {
|
|
var base = (sprnum << 2) + 0x40;
|
|
var base0 = oram[base];
|
|
var sy = 240 - (base0 - ((sprnum < 3) ? 1 : 0)); // the first three sprites match against y-1
|
|
var yy = (sl - sy);
|
|
if (yy >= 0 && yy < 16) {
|
|
var sx = oram[base + 3] + 1; // +1 pixel offset from tiles
|
|
if (sx == 0 && !this.showOffscreenObjects) {
|
|
continue; // drawn off-buffer
|
|
}
|
|
var code = oram[base + 1];
|
|
var flipx = code & 0x40; // TODO: flipx
|
|
if (code & 0x80) // flipy
|
|
yy = 15 - yy;
|
|
code &= 0x3f;
|
|
var color0 = (oram[base + 2] & 7) << 2;
|
|
var addr = gfxBase + (code << 5) + (yy < 8 ? yy : yy + 8);
|
|
outi = pixofs + sx; //<< 1
|
|
var data1 = rom[addr];
|
|
var data2 = rom[addr + 0x800];
|
|
for (var i = 0; i < 8; i++) {
|
|
var bm = 128 >> i;
|
|
var color = ((data1 & bm) ? 1 : 0) + ((data2 & bm) ? 2 : 0);
|
|
if (color)
|
|
pixels[flipx ? (outi + 15 - i) : (outi + i)] = palette[color0 + color];
|
|
}
|
|
var data1 = rom[addr + 8];
|
|
var data2 = rom[addr + 0x808];
|
|
for (var i = 0; i < 8; i++) {
|
|
var bm = 128 >> i;
|
|
var color = ((data1 & bm) ? 1 : 0) + ((data2 & bm) ? 2 : 0);
|
|
if (color)
|
|
pixels[flipx ? (outi + 7 - i) : (outi + i + 8)] = palette[color0 + color];
|
|
}
|
|
}
|
|
}
|
|
// draw bullets/shells
|
|
var shell = 0xff;
|
|
var missile = 0xff;
|
|
for (var which = 0; which < 8; which++) {
|
|
var sy = oram[0x60 + (which << 2) + 1];
|
|
if (((sy + sl - ((which < 3) ? 1 : 0)) & 0xff) == 0xff) {
|
|
if (which != 7)
|
|
shell = which;
|
|
else
|
|
missile = which;
|
|
}
|
|
}
|
|
for (var i = 0; i < 2; i++) {
|
|
which = i ? missile : shell;
|
|
if (which != 0xff) {
|
|
var sx = 255 - oram[0x60 + (which << 2) + 3];
|
|
var outi = pixofs + sx - this.missileOffset;
|
|
var col = which == 7 ? 0xffffff00 : 0xffffffff;
|
|
for (var j = 0; j < this.missileWidth; j++)
|
|
pixels[outi++] = col;
|
|
}
|
|
}
|
|
// draw stars
|
|
if (this.starsEnabled) {
|
|
var starx = ((this.frameCounter + stars[sl & 0xff]) & 0xff);
|
|
if ((starx + sl) & 0x10) {
|
|
var outi = pixofs + starx;
|
|
if ((pixels[outi] & 0xffffff) == 0) {
|
|
pixels[outi] = palette[sl & 0x1f];
|
|
}
|
|
}
|
|
}
|
|
};
|
|
};
|
|
const XTAL = 18432000.0;
|
|
const scanlinesPerFrame = 264;
|
|
const cpuFrequency = XTAL / 6; // 3.072 MHz
|
|
const hsyncFrequency = XTAL / 3 / 192 / 2; // 16 kHz
|
|
const vsyncFrequency = hsyncFrequency / 132 / 2; // 60.606060 Hz
|
|
const vblankDuration = 1 / vsyncFrequency * (20 / 132); // 2500 us
|
|
const cpuCyclesPerLine = cpuFrequency / hsyncFrequency;
|
|
const INITIAL_WATCHDOG = 8;
|
|
const audioOversample = 2;
|
|
const audioSampleRate = 60 * scanlinesPerFrame; // why not hsync?
|
|
class GalaxianMachine extends devices_1.BasicScanlineMachine {
|
|
constructor() {
|
|
super();
|
|
this.options = {};
|
|
this.palBase = 0x3800;
|
|
this.keyMap = GALAXIAN_KEYCODE_MAP;
|
|
this.cpuFrequency = cpuFrequency;
|
|
this.canvasWidth = 264;
|
|
this.numTotalScanlines = 264;
|
|
this.numVisibleScanlines = 264;
|
|
this.defaultROMSize = 0x4000;
|
|
this.sampleRate = audioSampleRate * audioOversample;
|
|
this.cpuCyclesPerLine = cpuCyclesPerLine | 0;
|
|
this.rotate = 90;
|
|
this.cpu = new ZilogZ80_1.Z80();
|
|
this.ram = new Uint8Array(0x800);
|
|
this.vram = new Uint8Array(0x400);
|
|
this.oram = new Uint8Array(0x100);
|
|
this.watchdog_counter = 0;
|
|
this.interruptEnabled = 0;
|
|
this.defaultInputs = [0xe, 0x8, 0x0];
|
|
this.read = (0, emu_1.newAddressDecoder)([
|
|
[0x0000, 0x3fff, 0, (a) => { return this.rom ? this.rom[a] : null; }],
|
|
[0x4000, 0x47ff, 0x3ff, (a) => { return this.ram[a]; }],
|
|
[0x5000, 0x57ff, 0x3ff, (a) => { return this.vram[a]; }],
|
|
[0x5800, 0x5fff, 0xff, (a) => { return this.oram[a]; }],
|
|
[0x6000, 0x6000, 0, (a) => { return this.inputs[0]; }],
|
|
[0x6800, 0x6800, 0, (a) => { return this.inputs[1]; }],
|
|
[0x7000, 0x7000, 0, (a) => { return this.inputs[2]; }],
|
|
[0x7800, 0x7800, 0, (a) => { this.watchdog_counter = INITIAL_WATCHDOG; }],
|
|
]);
|
|
this.write = (0, emu_1.newAddressDecoder)([
|
|
[0x4000, 0x47ff, 0x3ff, (a, v) => { this.ram[a] = v; }],
|
|
[0x5000, 0x57ff, 0x3ff, (a, v) => { this.vram[a] = v; }],
|
|
[0x5800, 0x5fff, 0xff, (a, v) => { this.oram[a] = v; }],
|
|
//[0x6004, 0x6007, 0x3, function(a,v) => { }], // lfo freq
|
|
//[0x6800, 0x6807, 0x7, function(a,v) => { }], // sound
|
|
//[0x7800, 0x7800, 0x7, function(a,v) => { }], // pitch
|
|
//[0x6000, 0x6003, 0x3, (a, v) => { this.outlatches[a] = v; }],
|
|
[0x7001, 0x7001, 0, (a, v) => { this.interruptEnabled = v & 1; }],
|
|
[0x7004, 0x7004, 0, (a, v) => { this.gfx.starsEnabled = v & 1; }],
|
|
]);
|
|
var audio = new audio_1.MasterAudio();
|
|
this.psg1 = new audio_1.AY38910_Audio(audio);
|
|
this.psg2 = new audio_1.AY38910_Audio(audio);
|
|
this.audioadapter = new audio_1.TssChannelAdapter([this.psg1.psg, this.psg2.psg], audioOversample, this.sampleRate);
|
|
this.init();
|
|
}
|
|
init() {
|
|
this.rom = new Uint8Array(this.defaultROMSize);
|
|
this.palette = new Uint32Array(new ArrayBuffer(32 * 4));
|
|
this.gfx = new GalaxianVideo(this.rom, this.vram, this.oram, this.palette, this.options);
|
|
this.connectCPUMemoryBus(this);
|
|
this.connectCPUIOBus(this.newIOBus());
|
|
this.inputs.set(this.defaultInputs);
|
|
this.handler = (0, emu_1.newKeyboardHandler)(this.inputs, this.keyMap);
|
|
}
|
|
readConst(a) {
|
|
return (a < 0x7000) ? this.read(a) : null;
|
|
}
|
|
newIOBus() {
|
|
return {
|
|
read: (addr) => {
|
|
return 0;
|
|
},
|
|
write: (addr, val) => {
|
|
if (addr & 0x1) {
|
|
this.psg1.selectRegister(val & 0xf);
|
|
}
|
|
;
|
|
if (addr & 0x2) {
|
|
this.psg1.setData(val);
|
|
}
|
|
;
|
|
if (addr & 0x4) {
|
|
this.psg2.selectRegister(val & 0xf);
|
|
}
|
|
;
|
|
if (addr & 0x8) {
|
|
this.psg2.setData(val);
|
|
}
|
|
;
|
|
}
|
|
};
|
|
}
|
|
reset() {
|
|
super.reset();
|
|
this.psg1.reset();
|
|
this.psg2.reset();
|
|
this.watchdog_counter = INITIAL_WATCHDOG;
|
|
}
|
|
startScanline() {
|
|
this.audio && this.audioadapter && this.audioadapter.generate(this.audio);
|
|
}
|
|
drawScanline() {
|
|
this.gfx.drawScanline(this.pixels, this.scanline);
|
|
}
|
|
advanceFrame(trap) {
|
|
var steps = super.advanceFrame(trap);
|
|
// advance graphics
|
|
this.gfx.advanceFrame();
|
|
// clear bottom of screen?
|
|
if (!this.gfx.showOffscreenObjects) {
|
|
for (var i = 0; i < 264; i++)
|
|
this.pixels.fill(0xff000000, 256 + i * 264, 264 + i * 264);
|
|
}
|
|
// watchdog fired?
|
|
if (this.watchdog_counter-- <= 0) {
|
|
throw new emu_1.EmuHalt("WATCHDOG FIRED");
|
|
}
|
|
// NMI interrupt @ 0x66
|
|
if (this.interruptEnabled) {
|
|
this.cpu.NMI();
|
|
}
|
|
return steps;
|
|
}
|
|
loadROM(data) {
|
|
this.rom.set((0, emu_1.padBytes)(data, this.defaultROMSize));
|
|
for (var i = 0; i < 32; i++) {
|
|
var b = this.rom[this.palBase + i];
|
|
this.palette[i] = 0xff000000;
|
|
for (var j = 0; j < 8; j++)
|
|
if (((1 << j) & b))
|
|
this.palette[i] += bitcolors[j];
|
|
}
|
|
}
|
|
loadState(state) {
|
|
super.loadState(state);
|
|
this.vram.set(state.bv);
|
|
this.oram.set(state.bo);
|
|
this.watchdog_counter = state.wdc;
|
|
this.interruptEnabled = state.ie;
|
|
this.gfx.starsEnabled = state.se;
|
|
this.gfx.frameCounter = state.fc;
|
|
}
|
|
saveState() {
|
|
var state = super.saveState();
|
|
state['bv'] = this.vram.slice(0);
|
|
state['bo'] = this.oram.slice(0);
|
|
state['fc'] = this.gfx.frameCounter;
|
|
state['ie'] = this.interruptEnabled;
|
|
state['se'] = this.gfx.starsEnabled;
|
|
state['wdc'] = this.watchdog_counter;
|
|
return state;
|
|
}
|
|
}
|
|
exports.GalaxianMachine = GalaxianMachine;
|
|
class GalaxianScrambleMachine extends GalaxianMachine {
|
|
constructor() {
|
|
super();
|
|
this.defaultROMSize = 0x5020;
|
|
this.palBase = 0x5000;
|
|
this.scramble = true;
|
|
this.keyMap = SCRAMBLE_KEYCODE_MAP;
|
|
this.options = {
|
|
gfxBase: 0x4000,
|
|
missileWidth: 1,
|
|
missileOffset: 6,
|
|
};
|
|
this.defaultInputs = [0xff, 0xfc, 0xf1];
|
|
this.read = (0, emu_1.newAddressDecoder)([
|
|
[0x0000, 0x3fff, 0, (a) => { return this.rom[a]; }],
|
|
[0x4000, 0x47ff, 0x7ff, (a) => { return this.ram[a]; }],
|
|
[0x4800, 0x4fff, 0x3ff, (a) => { return this.vram[a]; }],
|
|
[0x5000, 0x5fff, 0xff, (a) => { return this.oram[a]; }],
|
|
[0x7000, 0x7000, 0, (a) => { this.watchdog_counter = INITIAL_WATCHDOG; }],
|
|
[0x7800, 0x7800, 0, (a) => { this.watchdog_counter = INITIAL_WATCHDOG; }],
|
|
//[0x8000, 0x820f, 0, function(a) { return noise(); }], // TODO: remove
|
|
[0x8100, 0x8100, 0, (a) => { return this.inputs[0]; }],
|
|
[0x8101, 0x8101, 0, (a) => { return this.inputs[1]; }],
|
|
[0x8102, 0x8102, 0, (a) => { return this.inputs[2] | this.scramble_protection_alt_r(); }],
|
|
[0x8202, 0x8202, 0, (a) => { return this.m_protection_result; }],
|
|
[0x9100, 0x9100, 0, (a) => { return this.inputs[0]; }],
|
|
[0x9101, 0x9101, 0, (a) => { return this.inputs[1]; }],
|
|
[0x9102, 0x9102, 0, (a) => { return this.inputs[2] | this.scramble_protection_alt_r(); }],
|
|
[0x9212, 0x9212, 0, (a) => { return this.m_protection_result; }], // scramble (protection)
|
|
//[0, 0xffff, 0, function(a) { console.log(hex(a)); return 0; }]
|
|
]);
|
|
this.write = (0, emu_1.newAddressDecoder)([
|
|
[0x4000, 0x47ff, 0x7ff, (a, v) => { this.ram[a] = v; }],
|
|
[0x4800, 0x4fff, 0x3ff, (a, v) => { this.vram[a] = v; }],
|
|
[0x5000, 0x5fff, 0xff, (a, v) => { this.oram[a] = v; }],
|
|
[0x6801, 0x6801, 0, (a, v) => { this.interruptEnabled = v & 1; /*console.log(a,v,cpu.getPC().toString(16));*/ }],
|
|
[0x6802, 0x6802, 0, (a, v) => { }],
|
|
[0x6803, 0x6803, 0, (a, v) => { }],
|
|
[0x6804, 0x6804, 0, (a, v) => { this.gfx.starsEnabled = v & 1; }],
|
|
[0x6808, 0x6808, 0, (a, v) => { this.gfx.missileWidth = v; }],
|
|
[0x6809, 0x6809, 0, (a, v) => { this.gfx.missileOffset = v; }],
|
|
[0x8202, 0x8202, 0, this.scramble_protection_w.bind(this)],
|
|
//[0x8100, 0x8103, 0, function(a,v){ /* PPI 0 */ }],
|
|
//[0x8200, 0x8203, 0, function(a,v){ /* PPI 1 */ }],
|
|
//[0, 0xffff, 0, function(a,v) { console.log(hex(a),hex(v)); }]
|
|
]);
|
|
this.m_protection_state = 0;
|
|
this.m_protection_result = 0;
|
|
this.init(); // TODO: why do we have to call twice?
|
|
}
|
|
scramble_protection_w(addr, data) {
|
|
/*
|
|
This is not fully understood; the low 4 bits of port C are
|
|
inputs; the upper 4 bits are outputs. Scramble main set always
|
|
writes sequences of 3 or more nibbles to the low port and
|
|
expects certain results in the upper nibble afterwards.
|
|
*/
|
|
this.m_protection_state = (this.m_protection_state << 4) | (data & 0x0f);
|
|
switch (this.m_protection_state & 0xfff) {
|
|
/* scramble */
|
|
case 0xf09:
|
|
this.m_protection_result = 0xff;
|
|
break;
|
|
case 0xa49:
|
|
this.m_protection_result = 0xbf;
|
|
break;
|
|
case 0x319:
|
|
this.m_protection_result = 0x4f;
|
|
break;
|
|
case 0x5c9:
|
|
this.m_protection_result = 0x6f;
|
|
break;
|
|
/* scrambls */
|
|
case 0x246:
|
|
this.m_protection_result ^= 0x80;
|
|
break;
|
|
case 0xb5f:
|
|
this.m_protection_result = 0x6f;
|
|
break;
|
|
}
|
|
}
|
|
scramble_protection_alt_r() {
|
|
var bit = (this.m_protection_result >> 7) & 1;
|
|
return (bit << 5) | ((bit ^ 1) << 7);
|
|
}
|
|
}
|
|
exports.GalaxianScrambleMachine = GalaxianScrambleMachine;
|
|
//# sourceMappingURL=galaxian.js.map
|