374 lines
10 KiB
TypeScript
374 lines
10 KiB
TypeScript
"use strict";
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import { Platform, BaseMAMEPlatform, BaseZ80Platform, getToolForFilename_z80 } from "../baseplatform";
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import { PLATFORMS, RAM, newAddressDecoder, padBytes, noise, setKeyboardFromMap, AnimationTimer, RasterVideo, Keys, makeKeycodeMap } from "../emu";
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import { hex, lzgmini, stringToByteArray } from "../util";
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import { MasterAudio, SN76489_Audio } from "../audio";
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import { TMS9918A, SMSVDP } from "../video/tms9918a";
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import { ColecoVision_PRESETS } from "./coleco";
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// http://www.smspower.org/Development/Index
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// http://www.smspower.org/uploads/Development/sg1000.txt
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// http://www.smspower.org/uploads/Development/richard.txt
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// http://www.smspower.org/uploads/Development/msvdp-20021112.txt
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// TODO: merge w/ coleco
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export var SG1000_PRESETS = [
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{id:'text.c', name:'Text Mode'},
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{id:'hello.c', name:'Scrolling Text'},
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{id:'text32.c', name:'32-Column Color Text'},
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{id:'stars.c', name:'Scrolling Starfield'},
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{id:'cursorsmooth.c', name:'Moving Cursor'},
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{id:'simplemusic.c', name:'Simple Music'},
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{id:'musicplayer.c', name:'Multivoice Music'},
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{id:'mode2bitmap.c', name:'Mode 2 Bitmap'},
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{id:'mode2compressed.c', name:'Mode 2 Bitmap (LZG)'},
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{id:'lines.c', name:'Mode 2 Lines'},
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{id:'multicolor.c', name:'Multicolor Mode'},
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{id:'siegegame.c', name:'Siege Game'},
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{id:'shoot.c', name:'Solarian Game'},
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{id:'climber.c', name:'Platform Game'},
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];
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var SG1000_KEYCODE_MAP = makeKeycodeMap([
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[Keys.VK_UP, 0, 0x1],
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[Keys.VK_DOWN, 0, 0x2],
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[Keys.VK_LEFT, 0, 0x4],
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[Keys.VK_RIGHT, 0, 0x8],
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[Keys.VK_SPACE, 0, 0x10],
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[Keys.VK_CONTROL, 0, 0x20],
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[Keys.VK_R, 0, 0x40],
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[Keys.VK_F, 0, 0x80],
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[Keys.VK_D, 1, 0x1],
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[Keys.VK_G, 1, 0x2],
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[Keys.VK_A, 1, 0x4],
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[Keys.VK_S, 1, 0x8],
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[Keys.VK_1, 1, 0x10],
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]);
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class SG1000Platform extends BaseZ80Platform {
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cpuFrequency = 3579545; // MHz
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canvasWidth = 304;
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numTotalScanlines = 262;
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numVisibleScanlines = 240;
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cpuCyclesPerLine;
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cpu;
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ram : RAM;
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membus;
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iobus;
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rom = new Uint8Array(0);
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video;
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vdp;
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timer;
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audio;
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psg;
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inputs = new Uint8Array(4);
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mainElement : HTMLElement;
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currentScanline : number;
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startLineTstates : number;
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constructor(mainElement : HTMLElement) {
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super();
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this.mainElement = mainElement;
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}
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getPresets() { return SG1000_PRESETS; }
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newRAM() {
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return new RAM(0x400);
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}
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newMembus() {
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var ramSize = this.ram.mem.length;
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return {
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read: newAddressDecoder([
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[0xc000, 0xffff, ramSize-1, (a) => { return this.ram.mem[a]; }],
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[0x0000, 0xbfff, 0xffff, (a) => { return this.rom[a]; }],
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]),
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write: newAddressDecoder([
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[0xc000, 0xffff, ramSize-1, (a,v) => { this.ram.mem[a] = v; }],
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]),
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isContended: () => { return false; },
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};
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}
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getVCounter() : number { return 0; }
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getHCounter() : number { return 0; }
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setMemoryControl(v:number) { }
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setIOPortControl(v:number) { }
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newIOBus() {
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return {
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read: (addr:number) => {
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addr &= 0xff;
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//console.log('IO read', hex(addr,4));
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switch (addr & 0xc1) {
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case 0x40: return this.getVCounter();
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case 0x41: return this.getHCounter();
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case 0x80: return this.vdp.readData();
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case 0x81: return this.vdp.readStatus();
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case 0xc0: return this.inputs[0] ^ 0xff;
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case 0xc1: return this.inputs[1] ^ 0xff;
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}
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return 0;
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},
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write: (addr:number, val:number) => {
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addr &= 0xff;
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val &= 0xff;
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//console.log('IO write', hex(addr,4), hex(val,2));
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switch (addr & 0xc1) {
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case 0x00: return this.setMemoryControl(val);
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case 0x01: return this.setIOPortControl(val);
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case 0x40:
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case 0x41: return this.psg.setData(val);
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case 0x80: return this.vdp.writeData(val);
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case 0x81: return this.vdp.writeAddress(val);
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}
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}
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};
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}
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newVDP(frameData, cru, flicker) {
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return new TMS9918A(frameData, cru, flicker);
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}
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start() {
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this.cpuCyclesPerLine = Math.round(this.cpuFrequency / 60 / this.numTotalScanlines);
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this.ram = this.newRAM();
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this.membus = this.newMembus();
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this.iobus = this.newIOBus();
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this.cpu = this.newCPU(this.membus, this.iobus);
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this.video = new RasterVideo(this.mainElement, this.canvasWidth, this.numVisibleScanlines, {overscan:true});
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this.video.create();
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this.audio = new MasterAudio();
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this.psg = new SN76489_Audio(this.audio);
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var cru = {
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setVDPInterrupt: (b) => {
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if (b) {
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this.cpu.nonMaskableInterrupt();
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} else {
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// TODO: reset interrupt?
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}
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}
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};
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this.vdp = this.newVDP(this.video.getFrameData(), cru, true); // true = 4 sprites/line
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setKeyboardFromMap(this.video, this.inputs, SG1000_KEYCODE_MAP); // TODO
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this.timer = new AnimationTimer(60, this.nextFrame.bind(this));
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}
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readAddress(addr) {
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return this.membus.read(addr);
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}
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advance(novideo : boolean) {
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var extraCycles = 0;
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for (var sl=0; sl<this.numTotalScanlines; sl++) {
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this.currentScanline = sl;
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this.startLineTstates = this.cpu.getTstates() + extraCycles;
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extraCycles = this.runCPU(this.cpu, this.cpuCyclesPerLine - extraCycles); // TODO: HALT opcode?
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//debug//this.video.getFrameData()[sl] = -1>>>extraCycles;
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this.vdp.drawScanline(sl);
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}
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this.video.updateFrame();
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}
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loadROM(title, data) {
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this.rom = padBytes(data, 0xc000);
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this.reset();
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}
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loadState(state) {
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this.cpu.loadState(state.c);
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this.ram.mem.set(state.b);
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this.vdp.restoreState(state.vdp);
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this.inputs.set(state.in);
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}
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saveState() {
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return {
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c:this.getCPUState(),
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b:this.ram.mem.slice(0),
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vdp:this.vdp.getState(),
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in:this.inputs.slice(0),
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};
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}
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loadControlsState(state) {
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this.inputs.set(state.in);
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}
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saveControlsState() {
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return {
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in:this.inputs.slice(0)
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};
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}
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getCPUState() {
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return this.cpu.saveState();
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}
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isRunning() {
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return this.timer && this.timer.isRunning();
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}
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pause() {
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this.timer.stop();
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this.audio.stop();
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}
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resume() {
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this.timer.start();
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this.audio.start();
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}
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reset() {
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this.cpu.reset();
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this.cpu.setTstates(0);
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this.vdp.reset();
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this.psg.reset();
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}
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getDebugCategories() {
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return super.getDebugCategories().concat(['VDP']);
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}
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getDebugInfo(category, state) {
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switch (category) {
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case 'VDP': return this.vdpStateToLongString(state.vdp);
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default: return super.getDebugInfo(category, state);
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}
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}
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vdpStateToLongString(ppu) {
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return this.vdp.getRegsString();
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}
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}
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///
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class SMSPlatform extends SG1000Platform {
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cartram : RAM = new RAM(0);
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pagingRegisters = new Uint8Array(4);
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romPageMask : number;
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// TODO: add to state
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latchedHCounter = 0;
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ioControlFlags = 0;
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// TODO: hide bottom scanlines
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reset() {
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super.reset();
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this.pagingRegisters.set([0,0,1,2]);
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}
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newVDP(frameData, cru, flicker) {
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return new SMSVDP(frameData, cru, flicker);
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}
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getVCounter() {
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var y = this.currentScanline;
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return (y <= 0xda) ? (y) : (y - 6);
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}
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getHCounter() {
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return this.latchedHCounter;
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}
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computeHCounter() {
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var t0 = this.startLineTstates;
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var t1 = this.cpu.getTstates();
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return (t1-t0) & 0xff; // TODO
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}
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setIOPortControl(v:number) {
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if ((v ^ this.ioControlFlags) & 0xa0) { // either joystick TH pin
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this.latchedHCounter = this.computeHCounter();
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//console.log("H:"+hex(this.latchedHCounter)+" V:"+hex(this.getVCounter()));
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}
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this.ioControlFlags = v;
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}
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newRAM() { return new RAM(0x2000); }
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getPagedROM(a:number, reg:number) {
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//if (!(a&0xff)) console.log(hex(a), reg, this.pagingRegisters[reg], this.romPageMask);
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return this.rom[a + ((this.pagingRegisters[reg] & this.romPageMask) << 14)]; // * $4000
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}
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newMembus() {
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return {
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read: newAddressDecoder([
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[0xc000, 0xffff, 0x1fff, (a) => { return this.ram.mem[a]; }],
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[0x0000, 0x03ff, 0x3ff, (a) => { return this.rom[a]; }],
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[0x0400, 0x3fff, 0x3fff, (a) => { return this.getPagedROM(a,1); }],
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[0x4000, 0x7fff, 0x3fff, (a) => { return this.getPagedROM(a,2); }],
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[0x8000, 0xbfff, 0x3fff, (a) => {
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var reg0 = this.pagingRegisters[0]; // RAM select?
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if (reg0 & 0x8) {
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return this.cartram.mem[(reg0 & 0x4) ? a+0x4000 : a];
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} else {
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return this.getPagedROM(a,3);
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}
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}],
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]),
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write: newAddressDecoder([
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[0xc000, 0xfffb, 0x1fff, (a,v) => {
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this.ram.mem[a] = v;
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}],
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[0xfffc, 0xffff, 0x3, (a,v) => {
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this.pagingRegisters[a] = v;
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this.ram.mem[a+0x1ffc] = v;
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}],
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[0x8000, 0xbfff, 0x3fff, (a,v) => {
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var reg0 = this.pagingRegisters[0]; // RAM select?
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if (reg0 & 0x8) {
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if (this.cartram.mem.length == 0)
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this.cartram = new RAM(0x8000); // create cartridge RAM lazily
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this.cartram.mem[(reg0 & 0x4) ? a+0x4000 : a] = v;
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}
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}],
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]),
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isContended: () => { return false; },
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};
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}
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loadROM(title, data) {
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if (data.length <= 0xc000) {
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this.rom = padBytes(data, 0xc000);
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this.romPageMask = 3; // only pages 0, 1, 2
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} else {
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switch (data.length) {
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case 0x10000:
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case 0x20000:
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case 0x40000:
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case 0x80000:
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this.rom = data;
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this.romPageMask = (data.length >> 14) - 1; // div $4000
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break;
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default:
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throw "Unknown rom size: $" + hex(data.length);
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}
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}
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//console.log("romPageMask: " + hex(this.romPageMask));
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this.reset();
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}
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loadState(state) {
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super.loadState(state);
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this.pagingRegisters.set(state.pr);
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this.cartram.mem.set(state.cr);
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}
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saveState() {
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var state = super.saveState();
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state['pr'] = this.pagingRegisters.slice(0);
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state['cr'] = this.cartram.mem.slice(0);
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return state;
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}
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getDebugInfo(category, state) {
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switch (category) {
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case 'CPU':
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return super.getDebugInfo(category, state) +
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"\nBank Regs: " + this.pagingRegisters + "\n";
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default: return super.getDebugInfo(category, state);
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}
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}
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}
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///
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PLATFORMS['sms-sg1000-libcv'] = SG1000Platform;
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PLATFORMS['sms-sms-libcv'] = SMSPlatform;
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