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sms: fixed a few cases w/ http://www.smspower.org/Homebrew/SMSVDPTest-SMS
This commit is contained in:
Steven Hugg
parent
2dd5d88d55
commit
403b4264fc
@ -10,6 +10,7 @@ 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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@ -68,8 +69,8 @@ class SG1000Platform extends BaseZ80Platform {
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inputs = new Uint8Array(4);
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mainElement : HTMLElement;
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isSMS = false; // TODO: remove
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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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@ -96,13 +97,19 @@ class SG1000Platform extends BaseZ80Platform {
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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.isSMS ? this.currentScanline : 0;
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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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@ -115,10 +122,12 @@ class SG1000Platform extends BaseZ80Platform {
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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 0x80: return this.vdp.writeData(val);
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case 0x81: return this.vdp.writeAddress(val);
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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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@ -159,6 +168,7 @@ class SG1000Platform extends BaseZ80Platform {
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advance(novideo : boolean) {
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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();
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this.runCPU(this.cpu, this.cpuCyclesPerLine);
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this.vdp.drawScanline(sl);
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}
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@ -232,11 +242,12 @@ class SG1000Platform extends BaseZ80Platform {
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class SMSPlatform extends SG1000Platform {
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isSMS = true;
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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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@ -248,6 +259,26 @@ class SMSPlatform extends SG1000Platform {
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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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@ -43,8 +43,8 @@ export class TMS9918A {
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latch : boolean;
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prefetchByte : number;
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displayOn = null;
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interruptsOn = null;
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displayOn : boolean = false;
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interruptsOn : boolean = false;
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screenMode : number;
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bitmapMode : boolean;
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textMode : boolean;
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@ -493,6 +493,7 @@ export class TMS9918A {
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writeData(i:number) {
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this.ram[this.addressRegister++] = i;
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this.prefetchByte = i;
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this.addressRegister &= this.ramMask;
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this.latch = false;
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this.redrawRequired = true;
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@ -674,6 +675,9 @@ export class SMSVDP extends TMS9918A {
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cpalette = new Uint32Array(32); // color RAM (RGBA)
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registers = new Uint8Array(16); // 8 more registers (actually only 5)
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vramUntwiddled = new Uint8Array(0x8000);
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numVisibleLines = 192;
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lineCounter = 0; // TODO: state
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lineInterruptPending = false; // TODO: state
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reset() {
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super.reset();
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@ -682,6 +686,10 @@ export class SMSVDP extends TMS9918A {
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this.cpalette.fill(0);
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this.vramUntwiddled.fill(0);
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}
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readStatus() {
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this.lineInterruptPending = false;
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return super.readStatus();
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}
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updateMode(reg0:number, reg1:number) {
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if (reg0 & 0x04) {
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this.screenMode = TMS9918A_Mode.MODE4;
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@ -713,6 +721,7 @@ export class SMSVDP extends TMS9918A {
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var palindex = this.addressRegister++ & (this.cram.length-1);
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this.cram[palindex] = i;
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this.cpalette[palindex] = RGBA((i&3)<<6, ((i>>2)&3)<<6, ((i>>4)&3)<<6);
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this.prefetchByte = i;
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this.addressRegister &= this.ramMask;
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this.redrawRequired = true;
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} else {
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@ -722,16 +731,6 @@ export class SMSVDP extends TMS9918A {
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}
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this.latch = false;
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}
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readData() : number {
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if (this.writeToCRAM) {
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var palindex = this.addressRegister++ & (this.cram.length-1);
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this.addressRegister &= this.ramMask;
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return this.cram[palindex];
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} else {
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return super.readData();
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}
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}
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writeTwiddled(vdp_addr:number, val:number) {
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var planarBase = vdp_addr & 0x3ffc;
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var twiddledBase = planarBase * 2;
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@ -934,25 +933,24 @@ export class SMSVDP extends TMS9918A {
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count = count | 0;
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const borderIndex = 16 + (this.registers[7] & 0xf);
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const borderRGB = this.cpalette[borderIndex];
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for (var i = 0; i < count; i++)
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this.fb32[lineAddr + i] = borderRGB;
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this.fb32.fill(borderRGB, lineAddr, lineAddr+count);
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}
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rasterize_line(line:number) {
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line |= 0;
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var vdp_regs = this.registers;
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var drawHeight = 192; // TODO?
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var hBorder = (this.width - 256) >> 1;
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var vBorder = (this.height - 192) >> 1; // TODO?
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line = (line - vBorder*0) | 0; // TODO?
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const startAddr = (line * this.width) | 0;
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var drawWidth = 256;
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var drawHeight = this.numVisibleLines; // TODO?
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var hBorder = (this.width - drawWidth) >> 1;
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var vBorder = (this.height - drawHeight) >> 1; // TODO?
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const startAddr = ((line + vBorder) * this.width) | 0;
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const lineAddr = (startAddr + hBorder) | 0;
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if (!(line >= 0 && line < 224 && this.displayOn)) {
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if (!this.displayOn || line < 0 || line >= drawHeight) {
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if (line < this.height)
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this.border_clear(startAddr, this.width);
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}
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else if ((vdp_regs[1] & 64) === 0) {
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this.border_clear(startAddr, this.width);
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}
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else {
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else if (line >= 262-vBorder)
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this.border_clear((line-262+vBorder)*this.width, this.width);
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} else {
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var effectiveLine = line + vdp_regs[9];
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if (effectiveLine >= 224) {
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effectiveLine -= 224;
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@ -973,12 +971,29 @@ export class SMSVDP extends TMS9918A {
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this.border_clear(lineAddr, 8);
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}
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}
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// frame interrupts
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if (line == drawHeight) {
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this.statusRegister |= 0x80;
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if (this.interruptsOn) {
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this.cru.setVDPInterrupt(true);
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}
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}
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// line interrupts
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if (line <= drawHeight) {
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if (this.lineCounter > 0) {
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this.lineCounter--;
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} else {
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this.lineCounter = this.registers[0xa];
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this.lineInterruptPending = true;
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}
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} else {
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this.lineCounter = this.registers[0xa];
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}
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if (this.lineInterruptPending) {
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if (this.registers[0] & 0x10) {
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// TODO this.cru.setVDPInterrupt(true);
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}
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}
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}
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getDebugTables() {
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