mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-07-05 04:28:54 +00:00
624 lines
19 KiB
JavaScript
624 lines
19 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Atari7800 = void 0;
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const MOS6502_1 = require("../common/cpu/MOS6502");
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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 audio_1 = require("../common/audio");
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const util_1 = require("../common/util");
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const SWCHA = 0;
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const SWCHB = 2;
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const INPT0 = 8;
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const Atari7800_KEYCODE_MAP = (0, emu_1.makeKeycodeMap)([
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[emu_1.Keys.A, INPT0 + 0, 0x80],
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[emu_1.Keys.B, INPT0 + 1, 0x80],
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[emu_1.Keys.SELECT, SWCHB, -0x02],
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[emu_1.Keys.START, SWCHB, -0x01],
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[emu_1.Keys.UP, SWCHA, -0x10],
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[emu_1.Keys.DOWN, SWCHA, -0x20],
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[emu_1.Keys.LEFT, SWCHA, -0x40],
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[emu_1.Keys.RIGHT, SWCHA, -0x80],
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[emu_1.Keys.P2_A, INPT0 + 2, 0x80],
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[emu_1.Keys.P2_B, INPT0 + 3, 0x80],
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//[Keys.P2_SELECT, 1, 2],
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//[Keys.P2_START, 1, 3],
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[emu_1.Keys.P2_UP, SWCHA, -0x01],
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[emu_1.Keys.P2_DOWN, SWCHA, -0x02],
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[emu_1.Keys.P2_LEFT, SWCHA, -0x04],
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[emu_1.Keys.P2_RIGHT, SWCHA, -0x08],
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]);
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// http://www.ataripreservation.org/websites/freddy.offenga/megazine/ISSUE5-PALNTSC.html
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// http://7800.8bitdev.org/index.php/7800_Software_Guide#APPENDIX_4:_FRAME_TIMING
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const CLK = 3579545;
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const linesPerFrame = 262;
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const numVisibleLines = 258 - 16;
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const colorClocksPerLine = 454; // 456?
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const colorClocksPreDMA = 28;
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const audioOversample = 4;
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const audioSampleRate = linesPerFrame * 60 * audioOversample;
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// TIA chip
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class TIA {
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constructor() {
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this.regs = new Uint8Array(0x20);
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}
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reset() {
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this.regs.fill(0);
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}
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read(a) {
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return this.regs[a] | 0;
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}
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write(a, v) {
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this.regs[a] = v;
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}
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saveState() {
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return {
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regs: this.regs.slice(0)
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};
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}
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loadState(s) {
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for (let i = 0; i < 32; i++)
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this.write(i, s.regs[i]);
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}
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static stateToLongString(state) {
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let s = "";
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s += (0, emu_1.dumpRAM)(state.regs, 0, 32);
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return s;
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}
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}
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// MARIA chip
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class MARIA {
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constructor() {
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this.cycles = 0;
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this.regs = new Uint8Array(0x20);
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this.offset = -1;
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this.dll = 0;
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this.dlstart = 0;
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this.dli = false;
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this.h16 = false;
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this.h8 = false;
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this.pixels = new Uint8Array(320);
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this.WSYNC = 0;
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}
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reset() {
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this.regs.fill(0);
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// TODO?
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}
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read(a) {
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return this.regs[a] | 0;
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}
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write(a, v) {
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this.regs[a] = v;
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if (a == 0x04)
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this.WSYNC++;
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//console.log(hex(a), '=', hex(v));
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}
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saveState() {
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return {
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regs: this.regs.slice(0),
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offset: this.offset,
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dll: this.dll,
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dlstart: this.dlstart,
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dli: this.dli,
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h16: this.h16,
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h8: this.h8,
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};
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}
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loadState(s) {
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for (let i = 0; i < 32; i++)
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this.write(i, s.regs[i] | 0);
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this.offset = s.offset | 0;
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this.dll = s.dll | 0;
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this.dlstart = s.dlstart | 0;
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this.dli = !!s.dli;
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this.h16 = !!s.h16;
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this.h8 = !!s.h8;
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}
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isDMAEnabled() {
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return (this.regs[0x1c] & 0x60) == 0x40;
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}
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getDLLStart() {
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return (this.regs[0x0c] << 8) + this.regs[0x10];
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}
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getCharBaseAddress() {
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return (this.regs[0x14] << 8) + this.offset;
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}
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setVBLANK(b) {
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if (b) {
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this.regs[0x08] |= 0x80;
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this.offset = -1;
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this.dll = this.getDLLStart();
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this.dli = this.bus && (this.bus.read(this.dll) & 0x80) != 0; // if DLI on first zone
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}
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else {
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this.regs[0x08] &= ~0x80;
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}
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}
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readDLLEntry(bus) {
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// display lists must be in RAM (TODO: probe?)
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if (this.dll >= 0x4000) {
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return;
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}
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let x = bus.read(this.dll);
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this.offset = (x & 0xf);
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this.h16 = (x & 0x40) != 0;
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this.h8 = (x & 0x20) != 0;
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this.dlstart = (bus.read(this.dll + 1) << 8) + bus.read(this.dll + 2);
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//console.log(hex(this.dll,4), this.offset, hex(this.dlstart,4));
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this.dll = (this.dll + 3) & 0xffff; // TODO: can also only cross 1 page?
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this.dli = (bus.read(this.dll) & 0x80) != 0; // DLI flag is from next DLL entry
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}
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isHoley(a) {
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if (a & 0x8000) {
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if (this.h16 && (a & 0x1000))
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return true;
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if (this.h8 && (a & 0x800))
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return true;
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}
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return false;
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}
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readDMA(a) {
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if (this.isHoley(a))
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return 0;
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else {
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this.cycles += 3;
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return this.bus.read(a);
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}
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}
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doDMA(bus) {
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this.bus = bus;
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this.cycles = 0;
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this.pixels.fill(this.regs[0x0]);
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if (this.isDMAEnabled()) {
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this.cycles += 16; // TODO: last line in zone gets additional 8 cycles
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// time for a new DLL entry?
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if (this.offset < 0) {
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this.readDLLEntry(bus);
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}
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// read the DL (only can span two pages)
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let dlhi = this.dlstart & 0xff00;
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let dlofs = this.dlstart & 0xff;
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do {
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// read DL entry
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let b0 = bus.read(dlhi + ((dlofs + 0) & 0x1ff));
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let b1 = bus.read(dlhi + ((dlofs + 1) & 0x1ff));
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if (b1 == 0)
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break; // end of DL
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// display lists must be in RAM (TODO: probe?)
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if (dlhi >= 0x4000) {
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break;
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}
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let b2 = bus.read(dlhi + ((dlofs + 2) & 0x1ff));
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let b3 = bus.read(dlhi + ((dlofs + 3) & 0x1ff));
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let indirect = false;
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// extended header?
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if ((b1 & 31) == 0) {
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var pal = b3 >> 5;
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var width = 32 - (b3 & 31);
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var xpos = bus.read(dlhi + ((dlofs + 4) & 0x1ff));
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var writemode = b1 & 0x80;
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indirect = (b1 & 0x20) != 0;
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dlofs += 5;
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this.cycles += 10;
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}
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else {
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// direct mode
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var xpos = b3;
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var pal = b1 >> 5;
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var width = 32 - (b1 & 31);
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var writemode = 0;
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dlofs += 4;
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this.cycles += 8;
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}
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let gfxadr = b0 + (((b2 + (indirect ? 0 : this.offset)) & 0xff) << 8);
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xpos *= 2;
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// copy graphics data (direct)
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let readmode = (this.regs[0x1c] & 0x3) + (writemode ? 4 : 0);
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// double bytes?
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let dbl = indirect && (this.regs[0x1c] & 0x10) != 0;
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if (dbl) {
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width *= 2;
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}
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//if (this.offset == 0) console.log(hex(dla,4), hex(gfxadr,4), xpos, width, pal, readmode);
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for (var i = 0; i < width; i++) {
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let data = this.readDMA(dbl ? (gfxadr + (i >> 1)) : (gfxadr + i));
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if (indirect) {
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let indadr = ((this.regs[0x14] + this.offset) << 8) + data;
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if (dbl && (i & 1)) {
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indadr++;
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this.cycles -= 3; // indirect read has 6/9 cycles
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}
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data = this.readDMA(indadr);
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}
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// TODO: more modes (https://github.com/gstanton/ProSystem1_3/blob/master/Core/Maria.cpp)
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switch (readmode) {
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case 0: // 160 A/B
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for (let j = 0; j < 4; j++) {
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var col = (data >> 6) & 3;
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if (col > 0) {
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this.pixels[xpos] = this.pixels[xpos + 1] = this.regs[(pal << 2) + col];
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}
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data <<= 2;
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xpos = (xpos + 2) & 0x1ff;
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}
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break;
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case 2: // 320 B/D (TODO?)
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case 3: // 320 A/C
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for (let j = 0; j < 8; j++) {
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var col = (data & 128) ? 1 : 0;
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if (col > 0) {
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this.pixels[xpos] = this.regs[(pal << 2) + col];
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}
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data <<= 1;
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xpos = (xpos + 1) & 0x1ff;
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}
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break;
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}
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}
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} while (this.cycles < colorClocksPerLine); // TODO?
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// decrement offset
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this.offset -= 1;
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}
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return this.cycles;
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}
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doInterrupt() {
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if (this.dli && this.offset < 0) {
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this.dli = false;
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return true;
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}
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else
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return false;
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//return this.dli;// && this.offset == 1;
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}
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static stateToLongString(state) {
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let s = "";
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s += (0, emu_1.dumpRAM)(state.regs, 0, 32);
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s += "\n DLL: $" + (0, util_1.hex)((state.regs[0x0c] << 8) + state.regs[0x10], 4) + " @ $" + (0, util_1.hex)(state.dll, 4);
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s += "\n DL: $" + (0, util_1.hex)(state.dlstart, 4);
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s += "\nOffset: " + state.offset;
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s += "\n DLI? " + state.dli;
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return s;
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}
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}
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// Atari 7800
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class Atari7800 extends devices_1.BasicMachine {
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constructor() {
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super();
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this.cpuFrequency = 1789772;
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this.canvasWidth = 320;
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this.numTotalScanlines = linesPerFrame;
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this.numVisibleScanlines = numVisibleLines;
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this.defaultROMSize = 0xc000;
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this.cpuCyclesPerLine = 113.5;
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this.sampleRate = audioSampleRate;
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this.ram = new Uint8Array(0x1000);
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this.regs6532 = new Uint8Array(4);
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this.tia = new TIA();
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this.maria = new MARIA();
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this.lastFrameCycles = 0;
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this.xtracyc = 0;
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this.cpu = new MOS6502_1.MOS6502();
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this.read = (0, emu_1.newAddressDecoder)([
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[0x0008, 0x000d, 0x0f, (a) => { this.xtracyc++; return this.readInput(a); }],
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[0x0000, 0x001f, 0x1f, (a) => { this.xtracyc++; return this.tia.read(a); }],
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[0x0020, 0x003f, 0x1f, (a) => { return this.maria.read(a); }],
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[0x0040, 0x00ff, 0xff, (a) => { return this.ram[a + 0x800]; }],
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[0x0100, 0x013f, 0xff, (a) => { return this.read(a); }],
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[0x0140, 0x01ff, 0x1ff, (a) => { return this.ram[a + 0x800]; }],
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[0x0280, 0x02ff, 0x3, (a) => { this.xtracyc++; return this.inputs[a]; }],
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[0x1800, 0x27ff, 0xffff, (a) => { return this.ram[a - 0x1800]; }],
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[0x2800, 0x3fff, 0x7ff, (a) => { return this.read(a | 0x2000); }],
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[0x4000, 0xffff, 0xffff, (a) => { return this.rom ? this.rom[a - 0x4000] : 0; }],
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[0x0000, 0xffff, 0xffff, (a) => { return this.probe && this.probe.logIllegal(a); }],
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]);
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this.write = (0, emu_1.newAddressDecoder)([
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[0x0015, 0x001A, 0x1f, (a, v) => { this.xtracyc++; this.pokey1.setTIARegister(a, v); }],
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[0x0000, 0x001f, 0x1f, (a, v) => { this.xtracyc++; this.tia.write(a, v); }],
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[0x0020, 0x003f, 0x1f, (a, v) => { this.maria.write(a, v); }],
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[0x0040, 0x00ff, 0xff, (a, v) => { this.ram[a + 0x800] = v; }],
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[0x0100, 0x013f, 0xff, (a, v) => { this.write(a, v); }],
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[0x0140, 0x01ff, 0x1ff, (a, v) => { this.ram[a + 0x800] = v; }],
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[0x0280, 0x02ff, 0x3, (a, v) => { this.xtracyc++; this.regs6532[a] = v; /*TODO*/ }],
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[0x1800, 0x27ff, 0xffff, (a, v) => { this.ram[a - 0x1800] = v; }],
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[0x2800, 0x3fff, 0x7ff, (a, v) => { this.write(a | 0x2000, v); }],
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[0xbfff, 0xbfff, 0xffff, (a, v) => { }],
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[0x0000, 0xffff, 0xffff, (a, v) => { this.probe && this.probe.logIllegal(a); }],
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]);
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this.connectCPUMemoryBus(this);
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this.probeDMABus = this.probeIOBus(this);
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this.handler = (0, emu_1.newKeyboardHandler)(this.inputs, Atari7800_KEYCODE_MAP);
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this.pokey1 = new audio_1.POKEYDeviceChannel();
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this.audioadapter = new audio_1.TssChannelAdapter(this.pokey1, audioOversample, audioSampleRate);
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}
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readConst(a) {
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// make sure we don't log during this
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let oldprobe = this.probe;
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this.probe = null;
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let v = this.read(a);
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this.probe = oldprobe;
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return v;
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}
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readInput(a) {
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switch (a) {
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case 0xc: return ~this.inputs[0x8] & 0x80; //INPT4
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case 0xd: return ~this.inputs[0x9] & 0x80; //INPT5
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default: return this.inputs[a] | 0;
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}
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}
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advanceCPU() {
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var clk = super.advanceCPU();
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if (this.xtracyc) {
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clk += this.xtracyc;
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this.probe.logClocks(this.xtracyc);
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this.xtracyc = 0;
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}
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return clk;
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}
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advanceFrame(trap) {
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var idata = this.pixels;
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var iofs = 0;
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var rgb;
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var mc = 0;
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var fc = 0;
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var steps = 0;
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this.probe.logNewFrame();
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//console.log(hex(this.cpu.getPC()), hex(this.maria.dll));
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// visible lines
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for (var sl = 0; sl < linesPerFrame; sl++) {
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this.scanline = sl;
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var visible = sl < numVisibleLines;
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this.maria.setVBLANK(!visible);
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this.maria.WSYNC = 0;
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// pre-DMA clocks
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while (mc < colorClocksPreDMA) {
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if (this.maria.WSYNC)
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break;
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if (trap && trap()) {
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trap = null;
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sl = 999;
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break; // TODO?
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}
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mc += this.advanceCPU() << 2;
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steps++;
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}
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// is this scanline visible?
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if (visible) {
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// do DMA for scanline?
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let dmaClocks = this.maria.doDMA(this.probeDMABus);
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this.probe.logClocks(dmaClocks >> 2); // TODO: logDMA
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mc += dmaClocks;
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// copy line to frame buffer
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if (idata) {
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for (var i = 0; i < 320; i++) {
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idata[iofs++] = COLORS_RGBA[this.maria.pixels[i]];
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}
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}
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}
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// do interrupt? (if visible or before 1st scanline)
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if ((visible || sl == linesPerFrame - 1) && this.maria.doInterrupt()) {
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this.probe.logInterrupt(0);
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this.cpu.NMI();
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}
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// post-DMA clocks
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while (mc < colorClocksPerLine) {
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if (this.maria.WSYNC) {
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this.probe.logClocks((colorClocksPerLine - mc) >> 2);
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mc = colorClocksPerLine;
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break;
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}
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if (trap && trap()) {
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trap = null;
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sl = 999;
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break;
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}
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mc += this.advanceCPU() << 2;
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steps++;
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}
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// audio
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this.audio && this.audioadapter.generate(this.audio);
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// update clocks, scanline
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mc -= colorClocksPerLine;
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fc += mc;
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this.probe.logNewScanline();
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}
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/*
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// TODO let bkcol = this.maria.regs[0x0];
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// TODO $(this.video.canvas).css('background-color', COLORS_WEB[bkcol]);
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*/
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this.lastFrameCycles = fc;
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return steps;
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}
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getRasterX() { return this.lastFrameCycles % colorClocksPerLine; }
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getRasterY() { return Math.floor(this.lastFrameCycles / colorClocksPerLine); }
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loadROM(data) {
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if (data.length == 0xc080)
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data = data.slice(0x80); // strip header
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this.rom = (0, emu_1.padBytes)(data, this.defaultROMSize, true);
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}
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reset() {
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super.reset();
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this.tia.reset();
|
|
this.maria.reset();
|
|
this.inputs.fill(0x0);
|
|
this.inputs[SWCHA] = 0xff;
|
|
this.inputs[SWCHB] = 1 + 2 + 8;
|
|
//this.cpu.advanceClock(); // needed for test to pass?
|
|
}
|
|
readAddress(addr) {
|
|
return this.read(addr) | 0;
|
|
}
|
|
loadState(state) {
|
|
this.cpu.loadState(state.c);
|
|
this.ram.set(state.ram);
|
|
this.tia.loadState(state.tia);
|
|
this.maria.loadState(state.maria);
|
|
this.regs6532.set(state.regs6532);
|
|
this.loadControlsState(state);
|
|
}
|
|
saveState() {
|
|
return {
|
|
c: this.cpu.saveState(),
|
|
ram: this.ram.slice(0),
|
|
tia: this.tia.saveState(),
|
|
maria: this.maria.saveState(),
|
|
regs6532: this.regs6532.slice(0),
|
|
inputs: this.inputs.slice(0)
|
|
};
|
|
}
|
|
loadControlsState(state) {
|
|
this.inputs.set(state.inputs);
|
|
}
|
|
saveControlsState() {
|
|
return {
|
|
inputs: this.inputs.slice(0)
|
|
};
|
|
}
|
|
getDebugCategories() {
|
|
return ['CPU', 'Stack', 'TIA', 'MARIA'];
|
|
}
|
|
getDebugInfo(category, state) {
|
|
switch (category) {
|
|
case 'TIA': return TIA.stateToLongString(state.tia);
|
|
case 'MARIA': return MARIA.stateToLongString(state.maria) + "\nScanline: " + this.scanline;
|
|
//default: return super.getDebugInfo(category, state);
|
|
}
|
|
}
|
|
}
|
|
exports.Atari7800 = Atari7800;
|
|
///
|
|
const ATARI_NTSC_RGB = [
|
|
0x000000,
|
|
0x404040,
|
|
0x6c6c6c,
|
|
0x909090,
|
|
0xb0b0b0,
|
|
0xc8c8c8,
|
|
0xdcdcdc,
|
|
0xf4f4f4,
|
|
0x004444,
|
|
0x106464,
|
|
0x248484,
|
|
0x34a0a0,
|
|
0x40b8b8,
|
|
0x50d0d0,
|
|
0x5ce8e8,
|
|
0x68fcfc,
|
|
0x002870,
|
|
0x144484,
|
|
0x285c98,
|
|
0x3c78ac,
|
|
0x4c8cbc,
|
|
0x5ca0cc,
|
|
0x68b4dc,
|
|
0x78c8ec,
|
|
0x001884,
|
|
0x183498,
|
|
0x3050ac,
|
|
0x4868c0,
|
|
0x5c80d0,
|
|
0x7094e0,
|
|
0x80a8ec,
|
|
0x94bcfc,
|
|
0x000088,
|
|
0x20209c,
|
|
0x3c3cb0,
|
|
0x5858c0,
|
|
0x7070d0,
|
|
0x8888e0,
|
|
0xa0a0ec,
|
|
0xb4b4fc,
|
|
0x5c0078,
|
|
0x74208c,
|
|
0x883ca0,
|
|
0x9c58b0,
|
|
0xb070c0,
|
|
0xc084d0,
|
|
0xd09cdc,
|
|
0xe0b0ec,
|
|
0x780048,
|
|
0x902060,
|
|
0xa43c78,
|
|
0xb8588c,
|
|
0xcc70a0,
|
|
0xdc84b4,
|
|
0xec9cc4,
|
|
0xfcb0d4,
|
|
0x840014,
|
|
0x982030,
|
|
0xac3c4c,
|
|
0xc05868,
|
|
0xd0707c,
|
|
0xe08894,
|
|
0xeca0a8,
|
|
0xfcb4bc,
|
|
0x880000,
|
|
0x9c201c,
|
|
0xb04038,
|
|
0xc05c50,
|
|
0xd07468,
|
|
0xe08c7c,
|
|
0xeca490,
|
|
0xfcb8a4,
|
|
0x7c1800,
|
|
0x90381c,
|
|
0xa85438,
|
|
0xbc7050,
|
|
0xcc8868,
|
|
0xdc9c7c,
|
|
0xecb490,
|
|
0xfcc8a4,
|
|
0x5c2c00,
|
|
0x784c1c,
|
|
0x906838,
|
|
0xac8450,
|
|
0xc09c68,
|
|
0xd4b47c,
|
|
0xe8cc90,
|
|
0xfce0a4,
|
|
0x2c3c00,
|
|
0x485c1c,
|
|
0x647c38,
|
|
0x809c50,
|
|
0x94b468,
|
|
0xacd07c,
|
|
0xc0e490,
|
|
0xd4fca4,
|
|
0x003c00,
|
|
0x205c20,
|
|
0x407c40,
|
|
0x5c9c5c,
|
|
0x74b474,
|
|
0x8cd08c,
|
|
0xa4e4a4,
|
|
0xb8fcb8,
|
|
0x003814,
|
|
0x1c5c34,
|
|
0x387c50,
|
|
0x50986c,
|
|
0x68b484,
|
|
0x7ccc9c,
|
|
0x90e4b4,
|
|
0xa4fcc8,
|
|
0x00302c,
|
|
0x1c504c,
|
|
0x347068,
|
|
0x4c8c84,
|
|
0x64a89c,
|
|
0x78c0b4,
|
|
0x88d4cc,
|
|
0x9cece0,
|
|
0x002844,
|
|
0x184864,
|
|
0x306884,
|
|
0x4484a0,
|
|
0x589cb8,
|
|
0x6cb4d0,
|
|
0x7ccce8,
|
|
0x8ce0fc // FE
|
|
];
|
|
var COLORS_RGBA = new Uint32Array(256);
|
|
var COLORS_WEB = [];
|
|
for (var i = 0; i < 256; i++) {
|
|
COLORS_RGBA[i] = ATARI_NTSC_RGB[i >> 1] | 0xff000000;
|
|
COLORS_WEB[i] = "#" + (0, util_1.hex)((0, util_1.rgb2bgr)(ATARI_NTSC_RGB[i >> 1]), 6);
|
|
}
|
|
//# sourceMappingURL=atari7800.js.map
|