99 lines
2.4 KiB
TypeScript
99 lines
2.4 KiB
TypeScript
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import { Z80, Z80State } from "../common/cpu/ZilogZ80";
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import { BasicScanlineMachine, Bus, ProbeAll } from "../common/devices";
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import { newAddressDecoder, newKeyboardHandler } from "../common/emu";
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import { TssChannelAdapter } from "../common/audio";
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import { TMS9918A } from "../common/video/tms9918a";
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const audioOversample = 2;
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export abstract class BaseZ80VDPBasedMachine extends BasicScanlineMachine {
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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 = this.cpuFrequency / (262*60);
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sampleRate = 262*60*audioOversample;
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overscan = true;
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cpu: Z80 = new Z80();
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vdp: TMS9918A;
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psg;
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audioadapter;
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abstract vdpInterrupt();
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abstract getKeyboardMap();
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getKeyboardFunction() { return null; }
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init(membus:Bus, iobus:Bus, psg) {
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this.connectCPUMemoryBus(membus);
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this.connectCPUIOBus(iobus);
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this.handler = newKeyboardHandler(this.inputs, this.getKeyboardMap(), this.getKeyboardFunction());
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this.psg = psg;
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this.audioadapter = psg && new TssChannelAdapter(psg.psg, audioOversample, this.sampleRate);
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}
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connectVideo(pixels) {
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super.connectVideo(pixels);
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var cru = {
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setVDPInterrupt: (b) => {
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if (b) {
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this.vdpInterrupt();
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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.pixels, cru, true);
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}
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connectProbe(probe: ProbeAll) : void {
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super.connectProbe(probe);
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this.vdp.probe = probe || this.nullProbe;
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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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startScanline() {
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this.audio && this.audioadapter && this.audioadapter.generate(this.audio);
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}
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drawScanline() {
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this.vdp.drawScanline(this.scanline);
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}
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loadState(state) {
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super.loadState(state);
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this.vdp.restoreState(state['vdp']);
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}
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saveState() {
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var state = super.saveState();
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state['vdp'] = this.vdp.getState();
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return state;
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}
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reset() {
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super.reset();
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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 ['CPU','Stack','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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}
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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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readVRAMAddress(a : number) : number {
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return this.vdp.ram[a & 0x3fff];
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}
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}
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