mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-18 03:05:35 +00:00
382 lines
15 KiB
JavaScript
382 lines
15 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.WilliamsMachine = void 0;
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const audio_1 = require("../common/audio");
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const _6809_1 = require("../common/cpu/6809");
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const devices_1 = require("../common/devices");
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const emu_1 = require("../common/emu");
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const INITIAL_WATCHDOG = 8;
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const SCREEN_HEIGHT = 304;
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class WilliamsMachine extends devices_1.BasicScanlineMachine {
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constructor(isDefender) {
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super();
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this.isDefender = isDefender;
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this.xtal = 12000000;
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this.cpuFrequency = this.xtal / 3 / 4;
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//cpuCyclesPerLine = 64;
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this.cpuCyclesPerLine = 54; // TODO: becuse we swapped width and height
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this.canvasWidth = 256;
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this.numTotalScanlines = 304;
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this.numVisibleScanlines = 304;
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this.defaultROMSize = 0xc000;
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this.rotate = -90;
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this.sampleRate = 1;
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this.ram = new Uint8Array(0xc000);
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this.nvram = new Uint8Array(0x400);
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this.rom = new Uint8Array(0xc000);
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this.portsel = 0;
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this.banksel = 0;
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this.watchdog_counter = 0;
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this.watchdog_enabled = false;
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this.pia6821 = new Uint8Array(8);
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this.blitregs = new Uint8Array(8);
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this.palette = new Uint32Array(16);
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this.screenNeedsRefresh = false;
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this.cpuScale = 1;
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this.waitCycles = 0;
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this.palette.fill(0xff000000);
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this.initBus(isDefender);
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this.initInputs(isDefender);
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this.initAudio();
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this.initCPU();
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}
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initInputs(isDefender) {
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var DEFENDER_KEYCODE_MAP = (0, emu_1.makeKeycodeMap)([
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[emu_1.Keys.A, 4, 0x1],
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[emu_1.Keys.RIGHT, 4, 0x2],
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[emu_1.Keys.B, 4, 0x4],
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[emu_1.Keys.VK_X, 4, 0x8],
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[emu_1.Keys.P2_START, 4, 0x10],
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[emu_1.Keys.START, 4, 0x20],
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[emu_1.Keys.LEFT, 4, 0x40],
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[emu_1.Keys.DOWN, 4, 0x80],
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[emu_1.Keys.UP, 6, 0x1],
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[emu_1.Keys.SELECT, 0, 0x4],
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[emu_1.Keys.VK_7, 0, 0x1],
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[emu_1.Keys.VK_8, 0, 0x2],
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[emu_1.Keys.VK_9, 0, 0x8],
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]);
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var ROBOTRON_KEYCODE_MAP = (0, emu_1.makeKeycodeMap)([
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[emu_1.Keys.P2_UP, 0, 0x1],
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[emu_1.Keys.P2_DOWN, 0, 0x2],
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[emu_1.Keys.P2_LEFT, 0, 0x4],
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[emu_1.Keys.P2_RIGHT, 0, 0x8],
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[emu_1.Keys.START, 0, 0x10],
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[emu_1.Keys.P2_START, 0, 0x20],
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[emu_1.Keys.UP, 0, 0x40],
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[emu_1.Keys.DOWN, 0, 0x80],
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[emu_1.Keys.LEFT, 2, 0x1],
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[emu_1.Keys.RIGHT, 2, 0x2],
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[emu_1.Keys.VK_7, 4, 0x1],
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[emu_1.Keys.VK_8, 4, 0x2],
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[emu_1.Keys.VK_6, 4, 0x4],
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[emu_1.Keys.VK_9, 4, 0x8],
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[emu_1.Keys.SELECT, 4, 0x10],
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]);
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var KEYCODE_MAP = isDefender ? DEFENDER_KEYCODE_MAP : ROBOTRON_KEYCODE_MAP;
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//this.inputs.set(this.pia6821);
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this.handler = (0, emu_1.newKeyboardHandler)(this.pia6821, KEYCODE_MAP);
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}
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initBus(isDefender) {
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var ioread_defender = (0, emu_1.newAddressDecoder)([
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[0x400, 0x5ff, 0x1ff, (a) => { return this.nvram[a]; }],
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[0x800, 0x800, 0, (a) => { return this.scanline; }],
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[0xc00, 0xc07, 0x7, (a) => { return this.pia6821[a]; }],
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[0x0, 0xfff, 0, (a) => { }],
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]);
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var iowrite_defender = (0, emu_1.newAddressDecoder)([
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[0x0, 0xf, 0xf, this.setPalette.bind(this)],
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[0x3fc, 0x3ff, 0, (a, v) => { if (v == 0x38)
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this.watchdog_counter = INITIAL_WATCHDOG; this.watchdog_enabled = true; }],
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[0x400, 0x5ff, 0x1ff, (a, v) => { this.nvram[a] = v; }],
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[0xc02, 0xc02, 0x1, (a, v) => { if (this.worker)
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this.worker.postMessage({ command: v & 0x3f }); }],
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[0xc00, 0xc07, 0x7, (a, v) => { this.pia6821[a] = v; }],
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[0x0, 0xfff, 0, (a, v) => { }],
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]);
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var memread_defender = (0, emu_1.newAddressDecoder)([
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[0x0000, 0xbfff, 0xffff, (a) => { return this.ram[a]; }],
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[0xc000, 0xcfff, 0x0fff, (a) => {
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switch (this.banksel) {
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case 0: return ioread_defender(a);
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case 1: return this.rom[a + 0x3000];
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case 2: return this.rom[a + 0x4000];
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case 3: return this.rom[a + 0x5000];
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case 7: return this.rom[a + 0x6000];
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default: return 0; // TODO: error light
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}
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}],
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[0xd000, 0xffff, 0xffff, (a) => { return this.rom ? this.rom[a - 0xd000] : 0; }],
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]);
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var memwrite_defender = (0, emu_1.newAddressDecoder)([
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[0x0000, 0x97ff, 0, this.write_display_byte.bind(this)],
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[0x9800, 0xbfff, 0, (a, v) => { this.ram[a] = v; }],
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[0xc000, 0xcfff, 0x0fff, iowrite_defender.bind(this)],
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[0xd000, 0xdfff, 0, (a, v) => { this.banksel = v & 0x7; }],
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[0, 0xffff, 0, (a, v) => { }],
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]);
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// Robotron, Joust, Bubbles, Stargate
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var ioread_robotron = (0, emu_1.newAddressDecoder)([
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[0x804, 0x807, 0x3, (a) => { return this.pia6821[a]; }],
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[0x80c, 0x80f, 0x3, (a) => { return this.pia6821[a + 4]; }],
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[0xb00, 0xbff, 0, (a) => { return this.scanline; }],
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[0xc00, 0xfff, 0x3ff, (a) => { return this.nvram[a]; }],
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[0x0, 0xfff, 0, (a) => { }],
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]);
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var iowrite_robotron = (0, emu_1.newAddressDecoder)([
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[0x0, 0xf, 0xf, this.setPalette.bind(this)],
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[0x80c, 0x80c, 0xf, (a, v) => { if (this.worker)
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this.worker.postMessage({ command: v }); }],
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//[0x804, 0x807, 0x3, function(a,v) { console.log('iowrite',a); }], // TODO: sound
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//[0x80c, 0x80f, 0x3, function(a,v) { console.log('iowrite',a+4); }], // TODO: sound
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[0x900, 0x9ff, 0, (a, v) => { this.banksel = v & 0x1; }],
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[0xa00, 0xa07, 0x7, this.setBlitter.bind(this)],
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[0xbff, 0xbff, 0, (a, v) => { if (v == 0x39) {
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this.watchdog_counter = INITIAL_WATCHDOG;
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this.watchdog_enabled = true;
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} }],
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[0xc00, 0xfff, 0x3ff, (a, v) => { this.nvram[a] = v; }],
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//[0x0, 0xfff, 0, function(a,v) { console.log('iowrite',hex(a),hex(v)); }],
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]);
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var memread_robotron = (0, emu_1.newAddressDecoder)([
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[0x0000, 0x8fff, 0xffff, (a) => { return this.banksel ? this.rom[a] : this.ram[a]; }],
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[0x9000, 0xbfff, 0xffff, (a) => { return this.ram[a]; }],
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[0xc000, 0xcfff, 0x0fff, ioread_robotron],
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[0xd000, 0xffff, 0xffff, (a) => { return this.rom ? this.rom[a - 0x4000] : 0; }],
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]);
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var memwrite_robotron = (0, emu_1.newAddressDecoder)([
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[0x0000, 0x97ff, 0, this.write_display_byte.bind(this)],
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[0x9800, 0xbfff, 0, (a, v) => { this.ram[a] = v; }],
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[0xc000, 0xcfff, 0x0fff, iowrite_robotron.bind(this)],
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//[0x0000, 0xffff, 0, function(a,v) { console.log(hex(a), hex(v)); }],
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]);
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var memread_williams = isDefender ? memread_defender : memread_robotron;
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var memwrite_williams = isDefender ? memwrite_defender : memwrite_robotron;
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this.membus = {
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read: memread_williams,
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write: memwrite_williams,
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};
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this.membus = this.probeMemoryBus(this.membus);
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this.readAddress = this.membus.read;
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}
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initAudio() {
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this.master = new audio_1.MasterAudio();
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this.worker = new Worker("./src/common/audio/z80worker.js");
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let workerchannel = new audio_1.WorkerSoundChannel(this.worker);
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this.master.master.addChannel(workerchannel);
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}
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initCPU() {
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this.rom = new Uint8Array(this.defaultROMSize);
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this.cpu = this.newCPU(this.membus);
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//this.connectCPUMemoryBus(this);
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}
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newCPU(membus) {
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var cpu = Object.create((0, _6809_1.CPU6809)());
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cpu.init(membus.write, membus.read, 0);
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return cpu;
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}
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// d1d6 ldu $11 / beq $d1ed
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setPalette(a, v) {
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// RRRGGGBB
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var color = 0xff000000 | ((v & 7) << 5) | (((v >> 3) & 7) << 13) | (((v >> 6) << 22));
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if (color != this.palette[a]) {
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this.palette[a] = color;
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this.screenNeedsRefresh = true;
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}
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}
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write_display_byte(a, v) {
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this.ram[a] = v;
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this.drawDisplayByte(a, v);
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if (this.displayPCs)
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this.displayPCs[a] = this.cpu.getPC(); // save program counter
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}
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drawDisplayByte(a, v) {
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var ofs = ((a & 0xff00) << 1) | ((a & 0xff) ^ 0xff);
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this.pixels[ofs] = this.palette[v >> 4];
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this.pixels[ofs + 256] = this.palette[v & 0xf];
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}
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setBlitter(a, v) {
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if (a) {
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this.blitregs[a] = v;
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}
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else {
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var cycles = this.doBlit(v);
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this.waitCycles -= cycles * this.cpuScale; // wait CPU cycles
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}
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}
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doBlit(flags) {
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//console.log(hex(flags), blitregs);
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flags &= 0xff;
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var offs = SCREEN_HEIGHT - this.blitregs[7];
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var sstart = (this.blitregs[2] << 8) + this.blitregs[3];
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var dstart = (this.blitregs[4] << 8) + this.blitregs[5];
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var w = this.blitregs[6] ^ 4; // blitter bug fix
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var h = this.blitregs[7] ^ 4;
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if (w == 0)
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w++;
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if (h == 0)
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h++;
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if (h == 255)
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h++;
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var sxinc = (flags & 0x1) ? 256 : 1;
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var syinc = (flags & 0x1) ? 1 : w;
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var dxinc = (flags & 0x2) ? 256 : 1;
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var dyinc = (flags & 0x2) ? 1 : w;
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var pixdata = 0;
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for (var y = 0; y < h; y++) {
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var source = sstart & 0xffff;
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var dest = dstart & 0xffff;
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for (var x = 0; x < w; x++) {
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var data = this.membus.read(source);
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if (flags & 0x20) {
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pixdata = (pixdata << 8) | data;
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this.blit_pixel(dest, (pixdata >> 4) & 0xff, flags);
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}
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else {
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this.blit_pixel(dest, data, flags);
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}
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source += sxinc;
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source &= 0xffff;
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dest += dxinc;
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dest &= 0xffff;
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}
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if (flags & 0x2)
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dstart = (dstart & 0xff00) | ((dstart + dyinc) & 0xff);
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else
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dstart += dyinc;
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if (flags & 0x1)
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sstart = (sstart & 0xff00) | ((sstart + syinc) & 0xff);
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else
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sstart += syinc;
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}
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return w * h * (2 + ((flags & 0x4) >> 2)); // # of memory accesses
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}
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blit_pixel(dstaddr, srcdata, flags) {
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var curpix = dstaddr < 0xc000 ? this.ram[dstaddr] : this.membus.read(dstaddr);
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var solid = this.blitregs[1];
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var keepmask = 0xff; //what part of original dst byte should be kept, based on NO_EVEN and NO_ODD flags
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//even pixel (D7-D4)
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if ((flags & 0x8) && !(srcdata & 0xf0)) { //FG only and src even pixel=0
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if (flags & 0x80)
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keepmask &= 0x0f; // no even
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}
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else {
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if (!(flags & 0x80))
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keepmask &= 0x0f; // not no even
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}
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//odd pixel (D3-D0)
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if ((flags & 0x8) && !(srcdata & 0x0f)) { //FG only and src odd pixel=0
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if (flags & 0x40)
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keepmask &= 0xf0; // no odd
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}
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else {
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if (!(flags & 0x40))
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keepmask &= 0xf0; // not no odd
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}
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curpix &= keepmask;
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if (flags & 0x10) // solid bit
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curpix |= (solid & ~keepmask);
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else
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curpix |= (srcdata & ~keepmask);
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if (dstaddr < 0x9800) // can cause recursion otherwise
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this.membus.write(dstaddr, curpix);
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}
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startScanline() {
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this.audio && this.audioadapter && this.audioadapter.generate(this.audio);
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// TODO: line-by-line
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if (this.screenNeedsRefresh && this.scanline == 0) {
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for (var i = 0; i < 0x9800; i++)
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this.drawDisplayByte(i, this.ram[i]);
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this.screenNeedsRefresh = false;
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}
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if (this.scanline == 0 && this.watchdog_enabled && this.watchdog_counter-- <= 0) {
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console.log("WATCHDOG FIRED, PC =", this.cpu.getPC().toString(16)); // TODO: alert on video
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// TODO: this.breakpointHit(cpu.T());
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this.reset();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
drawScanline() {
|
||
|
|
// 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) {
|
||
|
|
return this.membus.read(a);
|
||
|
|
}
|
||
|
|
write(a, v) {
|
||
|
|
this.membus.write(a, v);
|
||
|
|
}
|
||
|
|
readConst(a) {
|
||
|
|
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 = (0, emu_1.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 = (0, emu_1.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),
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exports.WilliamsMachine = WilliamsMachine;
|
||
|
|
//# sourceMappingURL=williams.js.map
|