From e4e59d6c0da836714eb9a019cd97fb7c960c2ef6 Mon Sep 17 00:00:00 2001 From: Steven Hugg Date: Sun, 2 Apr 2017 14:54:51 -0400 Subject: [PATCH] working on z80 sound worker --- index.html | 2 + presets/sound_williams-z80/minimal.c | 17 ++ presets/sound_williams-z80/skeleton.sdcc | 17 ++ presets/vicdual/gfxtest.c | 23 +- src/audio.js | 306 +++++++++++++++++++++++ src/audio/testz80worker.html | 4 + src/audio/z80worker.js | 163 ++++++++++++ src/emu.js | 265 +------------------- src/platform/sound_williams.js | 159 ++++++++++++ src/platform/williams.js | 15 +- src/worker/workermain.js | 6 + 11 files changed, 707 insertions(+), 270 deletions(-) create mode 100644 presets/sound_williams-z80/minimal.c create mode 100644 presets/sound_williams-z80/skeleton.sdcc create mode 100644 src/audio.js create mode 100644 src/audio/testz80worker.html create mode 100644 src/audio/z80worker.js create mode 100644 src/platform/sound_williams.js diff --git a/index.html b/index.html index 1a01a9a2..60f2a724 100644 --- a/index.html +++ b/index.html @@ -214,6 +214,7 @@ div.bitmap_editor {
  • Galaxian/Scramble
  • Atari Color Vector (Z80)
  • Williams (Z80)
    • +
  • Williams Sound (Z80)
  • @@ -315,6 +316,7 @@ Dest: $0000/0 + diff --git a/presets/sound_williams-z80/minimal.c b/presets/sound_williams-z80/minimal.c new file mode 100644 index 00000000..7e230035 --- /dev/null +++ b/presets/sound_williams-z80/minimal.c @@ -0,0 +1,17 @@ + +const __sfr __at (0x0) command; +__sfr __at (0x0) dac; + +#define HALT __asm halt __endasm; + +// press "2" or higher to activate... + +void main() { + char i; + char j; + if (command == 0) HALT; + for (i=0; i<255; i++) { + for (j=0; j>4) & 0xf])); + putchar(x+1, y, HEXSTR[val & 0xf]); + putchar(x, y, HEXSTR[(val>>4) & 0xf]); } void show_charset() { - word i; + byte i; const byte xofs = 7; const byte yofs = 22; - for (i=0; i<=0xff; i++) { - byte y = yofs-(i>>4); - putchar(xofs+(i&15), y, i); - } for (i=0; i<=0xf; i++) { byte y = yofs-i; draw_hex(xofs-4, y, i<<4); putchar(xofs+i, yofs-17, HEXSTR[i]); } + i=0; + do { + byte y = yofs-(i>>4); + putchar(xofs+(i&15), y, i); + } while (++i != 0); } void main() { palette = 1; memcpy(tileram, font8x8, sizeof(font8x8)); - memset(cellram, CHAR(' '), sizeof(cellram)); + memset(cellram, 32, sizeof(cellram)); draw_box(0, 0, 27, 31, BOX_CHARS); putstring(7, 25, "Character Set"); show_charset(); diff --git a/src/audio.js b/src/audio.js new file mode 100644 index 00000000..9750d7b4 --- /dev/null +++ b/src/audio.js @@ -0,0 +1,306 @@ +"use strict"; + +var MasterAudio = function() { + this.master = new MasterChannel(); + this.start = function() { + this.looper = new AudioLooper(512); + this.looper.setChannel(this.master); + this.looper.activate(); + } + this.stop = function() { + this.looper.setChannel(null); + } +} + +var AY38910_Audio = function(master) { + this.psg = new PsgDeviceChannel(); + this.psg.setMode(PsgDeviceChannel.MODE_SIGNED); + this.psg.setDevice(PsgDeviceChannel.DEVICE_AY_3_8910); + master.master.addChannel(this.psg); + var curreg = 0; + + this.reset = function() { + for (var i=15; i>=0; i--) { + this.selectRegister(i); + this.setData(0); + } + } + this.selectRegister = function(val) { + curreg = val & 0xf; + } + this.setData = function(val) { + this.psg.writeRegisterAY(curreg, val & 0xff); + } +} + +// https://en.wikipedia.org/wiki/POKEY +// https://user.xmission.com/~trevin/atari/pokey_regs.html +// http://krap.pl/mirrorz/atari/homepage.ntlworld.com/kryten_droid/Atari/800XL/atari_hw/pokey.htm + +var POKEYDeviceChannel = function() { + + /* definitions for AUDCx (D201, D203, D205, D207) */ + var NOTPOLY5 = 0x80 /* selects POLY5 or direct CLOCK */ + var POLY4 = 0x40 /* selects POLY4 or POLY17 */ + var PURE = 0x20 /* selects POLY4/17 or PURE tone */ + var VOL_ONLY = 0x10 /* selects VOLUME OUTPUT ONLY */ + var VOLUME_MASK = 0x0f /* volume mask */ + + /* definitions for AUDCTL (D208) */ + var POLY9 = 0x80 /* selects POLY9 or POLY17 */ + var CH1_179 = 0x40 /* selects 1.78979 MHz for Ch 1 */ + var CH3_179 = 0x20 /* selects 1.78979 MHz for Ch 3 */ + var CH1_CH2 = 0x10 /* clocks channel 1 w/channel 2 */ + var CH3_CH4 = 0x08 /* clocks channel 3 w/channel 4 */ + var CH1_FILTER = 0x04 /* selects channel 1 high pass filter */ + var CH2_FILTER = 0x02 /* selects channel 2 high pass filter */ + var CLOCK_15 = 0x01 /* selects 15.6999kHz or 63.9210kHz */ + + /* for accuracy, the 64kHz and 15kHz clocks are exact divisions of + the 1.79MHz clock */ + var DIV_64 = 28 /* divisor for 1.79MHz clock to 64 kHz */ + var DIV_15 = 114 /* divisor for 1.79MHz clock to 15 kHz */ + + /* the size (in entries) of the 4 polynomial tables */ + var POLY4_SIZE = 0x000f + var POLY5_SIZE = 0x001f + var POLY9_SIZE = 0x01ff + + var POLY17_SIZE = 0x0001ffff /* else use the full 17 bits */ + + /* channel/chip definitions */ + var CHAN1 = 0 + var CHAN2 = 1 + var CHAN3 = 2 + var CHAN4 = 3 + var CHIP1 = 0 + var CHIP2 = 4 + var CHIP3 = 8 + var CHIP4 = 12 + var SAMPLE = 127 + + var FREQ_17_EXACT = 1789790.0 /* exact 1.79 MHz clock freq */ + var FREQ_17_APPROX = 1787520.0 /* approximate 1.79 MHz clock freq */ + + // LFSR sequences + var bit1 = [ 0,1 ]; + var bit4 = [ 1,1,0,1,1,1,0,0,0,0,1,0,1,0,0 ]; + var bit5 = [ 0,0,1,1,0,0,0,1,1,1,1,0,0,1,0,1,0,1,1,0,1,1,1,0,1,0,0,0,0,0,1 ]; + var bit17 = new Uint8Array(1<<17); + var bit17_5 = new Uint8Array(1<<17); + var bit5_4 = new Uint8Array(1<<17); + for (var i=0; i 0.5; + bit17_5[i] = bit17[i] & bit5[i % bit5.length]; + bit5_4[i] = bit5[i % bit5.length] & bit4[i % bit4.length]; + } + var wavetones = [ + bit17_5, bit5, bit5_4, bit5, + bit17, bit1, bit4, bit1 + ]; + + // registers + var regs = new Uint8Array(16); + var counters = new Float32Array(4); + var deltas = new Float32Array(4); + var volume = new Float32Array(4); + var audc = new Uint8Array(4); + var waveforms = [bit1, bit1, bit1, bit1]; + var buffer; + var sampleRate; + var clock, baseDelta; + var dirty = true; + + // + + this.setBufferLength = function (length) { + buffer = new Int32Array(length); + }; + + this.getBuffer = function () { + return buffer; + }; + + this.setSampleRate = function (rate) { + sampleRate = rate; + baseDelta = FREQ_17_EXACT / rate / 1.2; // TODO? + }; + + function updateValues(addr) { + var ctrl = regs[8]; + var base = (ctrl & CLOCK_15) ? DIV_15 : DIV_64; + var div; + var i = addr & 4; + var j = i>>1; + var k = i>>2; + if (ctrl & (CH1_CH2>>k)) { + if (ctrl & (CH1_179>>k)) + div = regs[i+2] * 256 + regs[i+0] + 7; + else + div = (regs[i+2] * 256 + regs[i+0] + 1) * base; + deltas[j+1] = baseDelta / div; + deltas[j+0] = 0; + } else { + if (ctrl & (CH1_179>>k)) { + div = regs[i+0] + 4; + } else { + div = (regs[i+0] + 1) * base; + } + deltas[j+0] = baseDelta / div; + div = (regs[i+2] + 1) * base; + deltas[j+1] = baseDelta / div; + } + //console.log(addr, ctrl.toString(16), div, deltas[j+0], deltas[j+1]); + } + + this.setRegister = function(addr, value) { + addr &= 0xf; + value &= 0xff; + if (regs[addr] != value) { + regs[addr] = value; + switch (addr) { + case 0: + case 2: + case 4: + case 6: // AUDF + case 8: // ctrl + dirty = true; + break; + case 1: + case 3: + case 5: + case 7: // AUDC + volume[addr>>1] = value & 0xf; + waveforms[addr>>1] = wavetones[value>>5]; + break; + } + } + } + + this.generate = function (length) { + if (dirty) { + updateValues(0); + updateValues(4); + dirty = false; + } + for (var s=0; s 0 && d < 1 && v > 0) { + var wav = waveforms[i]; + var cnt = counters[i] += d; + if (cnt > POLY17_SIZE+1) { + counters[i] -= POLY17_SIZE+1; + } + var on = wav[Math.floor(cnt % wav.length)]; + if (on) { + sample += v; + } + } + } + sample *= 273; + buffer[s] = sample; + buffer[s+1] = sample; + } + } +} + +////// CPU sound (unused) + +var CPUSoundChannel = function(cpu, clockRate) { + var sampleRate; + var buffer; + var lastbufpos=0; + var curSample=0; + var clocksPerSample; + + this.setBufferLength = function (length) { + buffer = new Int32Array(length); + }; + + this.getBuffer = function () { + return buffer; + }; + + this.setSampleRate = function (rate) { + sampleRate = rate; + }; + + this.getSetDACFunction = function() { + return function(a,v) { + var bufpos = Math.floor(cpu.getTstates() / clocksPerSample); + while (lastbufpos < bufpos) + buffer[lastbufpos++] = curSample; + lastbufpos = bufpos; + curSample = v; + }; + }; + + this.generate = function (length) { + clocksPerSample = clockRate * 1.0 / sampleRate; + var clocks = Math.round(length * clocksPerSample); + if (cpu.getTstates && cpu.runFrame) { + cpu.setTstates(0); + lastbufpos = 0; + cpu.runFrame(cpu.getTstates() + totalClocks); + while (lastbufpos < length) + buffer[lastbufpos++] = curSample; + } + }; +} + +////// Worker sound + +var WorkerSoundChannel = function(worker) { + var sampleRate; + var output; + var pending = []; + var pendingLength = 0; + + worker.onmessage = function(e) { + if (e && e.data && e.data.samples && output) { + pending.push(e.data.samples); + pendingLength += e.data.samples.length; + } + }; + + this.setBufferLength = function (length) { + output = new Int16Array(length); + //worker.postMessage({bufferLength:length,numChannels:2}); + pendingLength = 0; + }; + + this.getBuffer = function () { + return output; + }; + + this.setSampleRate = function (rate) { + sampleRate = rate; + worker.postMessage({sampleRate:rate}); + }; + + this.generate = function (length) { + if (pendingLength < length*3) { + //console.log(length, pendingLength); + output.fill(0); + return; // TODO: send sync msg? + } + for (var i=0; i +var worker = new Worker("./z80worker.js"); +worker.postMessage({}); + diff --git a/src/audio/z80worker.js b/src/audio/z80worker.js new file mode 100644 index 00000000..e114be96 --- /dev/null +++ b/src/audio/z80worker.js @@ -0,0 +1,163 @@ +"use strict"; + +/**************************************************************************** + + Midway/Williams Audio Boards + ---------------------------- + + 6809 MEMORY MAP + + Function Address R/W Data + --------------------------------------------------------------- + Program RAM 0000-07FF R/W D0-D7 + + Music (YM-2151) 2000-2001 R/W D0-D7 + + 6821 PIA 4000-4003 R/W D0-D7 + + HC55516 clock low, digit latch 6000 W D0 + HC55516 clock high 6800 W xx + + Bank select 7800 W D0-D2 + + Banked Program ROM 8000-FFFF R D0-D7 + +****************************************************************************/ + +var window = {}; + +importScripts("../emu.js"); +importScripts("../cpu/z80.js"); + +window.buildZ80({ + applyContention: false +}); + +var cpu, ram, rom, membus, iobus; +var audio; +var command = 0; +var dac = 0; +var current_buffer; +var last_tstate; + +var timer; +var curTime; +var timerPeriod = 20; +var sampleRate; +var numChannels = 2; +var bufferLength; + +var cpuFrequency = 18432000/6; // 3.072 MHz +var cpuCyclesPerFrame = cpuFrequency/60; +var cpuAudioFactor = 32; + + +function fillBuffer() { + var t = cpu.getTstates() / cpuAudioFactor; + while (last_tstate < t) { + current_buffer[last_tstate*2] = dac; + current_buffer[last_tstate*2+1] = dac; + last_tstate++; + } +} + +function start() { + ram = new RAM(0x400); + rom = [0xe,0x0,0x6,0x0,0x78,0xb9,0x30,0x06,0xa9,0xd3,0x00,0x04,0x18,0xf6,0x0c,0x79,0xd6,0xff,0x38,0xee,0x76,0x18,0xea]; // TODO + membus = { + read: new AddressDecoder([ + [0x0000, 0x3fff, 0x3fff, function(a) { return rom ? rom[a] : null; }], + [0x4000, 0x5fff, 0xfff, function(a) { return ram.mem[a]; }] + ]), + write: new AddressDecoder([ + [0x4000, 0x5fff, 0xfff, function(a,v) { ram.mem[a] = v; }], + ]), + isContended: function() { return false; }, + }; + iobus = { + read: function(addr) { + return command & 0xff; + }, + write: function(addr, val) { + dac = (val & 0xff) << 8; + fillBuffer(); + } + }; + cpu = window.Z80({ + display: {}, + memory: membus, + ioBus: iobus + }); + current_buffer = new Int16Array(bufferLength); +} + +function timerCallback() { + cpu.setTstates(0); + last_tstate = 0; + var numStates = Math.floor(bufferLength * cpuAudioFactor / numChannels); + cpu.runFrame(numStates); + //console.log(numStates, cpu.getTstates()); + cpu.setTstates(numStates); // TODO? + fillBuffer(); + postMessage({samples:current_buffer}); + if (!cpu.getHalted()) { + curTime += timerPeriod; + var dt = curTime - new Date().getTime(); + if (dt < 0) dt = 0; + timer = setTimeout(timerCallback, dt); + } else { + timer = 0; + } +} + +function reset() { + if (!bufferLength) return; + cpu.reset(); + if (!timer) { + curTime = new Date().getTime() - timerPeriod*4; + timerCallback(); + } +} + +onmessage = function(e) { + if (e && e.data) { + if (e.data.command) { + command = e.data.command & 0xff; + reset(); + } else if (e.data.sampleRate) { + console.log(e.data); + sampleRate = e.data.sampleRate; + bufferLength = numChannels*sampleRate*timerPeriod/1000; + start(); + reset(); + } + } +} + + +/** + +0000 56 _main:: + 57 ;:10: +0000 0E 00 [ 7] 58 ld c,#0x00 + 59 ;:11: +0002 60 00111$: +0002 06 00 [ 7] 61 ld b,#0x00 +0004 62 00104$: +0004 78 [ 4] 63 ld a,b +0005 B9 [ 4] 64 cp a,c +0006 30 06 [12] 65 jr NC,00107$ +0008 A9 [ 4] 66 xor a, c +0009 D3 00 [11] 67 out (_dac),a +000B 04 [ 4] 68 inc b +000C 18 F6 [12] 69 jr 00104$ +000E 70 00107$: + 71 ;:10: +000E 0C [ 4] 72 inc c +000F 79 [ 4] 73 ld a,c +0010 D6 FF [ 7] 74 sub a, #0xff +0012 38 EE [12] 75 jr C,00111$ + 76 ;:13: +0014 18 EA [12] 77 jr _main + +**/ diff --git a/src/emu.js b/src/emu.js index 020712b2..0205c1e7 100644 --- a/src/emu.js +++ b/src/emu.js @@ -248,15 +248,19 @@ var SampleAudio = function(clockfreq) { var m = this.module; if (!m) m = ape.srcElement.module; if (!m) return; - - var buf = bufferlist[1]; - for (var i=0; i=0; i--) { - this.selectRegister(i); - this.setData(0); - } - } - this.selectRegister = function(val) { - curreg = val & 0xf; - } - this.setData = function(val) { - this.psg.writeRegisterAY(curreg, val & 0xff); - } -} - -// https://en.wikipedia.org/wiki/POKEY -// https://user.xmission.com/~trevin/atari/pokey_regs.html -// http://krap.pl/mirrorz/atari/homepage.ntlworld.com/kryten_droid/Atari/800XL/atari_hw/pokey.htm - -var POKEYDeviceChannel = function() { - - /* definitions for AUDCx (D201, D203, D205, D207) */ - var NOTPOLY5 = 0x80 /* selects POLY5 or direct CLOCK */ - var POLY4 = 0x40 /* selects POLY4 or POLY17 */ - var PURE = 0x20 /* selects POLY4/17 or PURE tone */ - var VOL_ONLY = 0x10 /* selects VOLUME OUTPUT ONLY */ - var VOLUME_MASK = 0x0f /* volume mask */ - - /* definitions for AUDCTL (D208) */ - var POLY9 = 0x80 /* selects POLY9 or POLY17 */ - var CH1_179 = 0x40 /* selects 1.78979 MHz for Ch 1 */ - var CH3_179 = 0x20 /* selects 1.78979 MHz for Ch 3 */ - var CH1_CH2 = 0x10 /* clocks channel 1 w/channel 2 */ - var CH3_CH4 = 0x08 /* clocks channel 3 w/channel 4 */ - var CH1_FILTER = 0x04 /* selects channel 1 high pass filter */ - var CH2_FILTER = 0x02 /* selects channel 2 high pass filter */ - var CLOCK_15 = 0x01 /* selects 15.6999kHz or 63.9210kHz */ - - /* for accuracy, the 64kHz and 15kHz clocks are exact divisions of - the 1.79MHz clock */ - var DIV_64 = 28 /* divisor for 1.79MHz clock to 64 kHz */ - var DIV_15 = 114 /* divisor for 1.79MHz clock to 15 kHz */ - - /* the size (in entries) of the 4 polynomial tables */ - var POLY4_SIZE = 0x000f - var POLY5_SIZE = 0x001f - var POLY9_SIZE = 0x01ff - - var POLY17_SIZE = 0x0001ffff /* else use the full 17 bits */ - - /* channel/chip definitions */ - var CHAN1 = 0 - var CHAN2 = 1 - var CHAN3 = 2 - var CHAN4 = 3 - var CHIP1 = 0 - var CHIP2 = 4 - var CHIP3 = 8 - var CHIP4 = 12 - var SAMPLE = 127 - - var FREQ_17_EXACT = 1789790.0 /* exact 1.79 MHz clock freq */ - var FREQ_17_APPROX = 1787520.0 /* approximate 1.79 MHz clock freq */ - - // LFSR sequences - var bit1 = [ 0,1 ]; - var bit4 = [ 1,1,0,1,1,1,0,0,0,0,1,0,1,0,0 ]; - var bit5 = [ 0,0,1,1,0,0,0,1,1,1,1,0,0,1,0,1,0,1,1,0,1,1,1,0,1,0,0,0,0,0,1 ]; - var bit17 = new Uint8Array(1<<17); - var bit17_5 = new Uint8Array(1<<17); - var bit5_4 = new Uint8Array(1<<17); - for (var i=0; i 0.5; - bit17_5[i] = bit17[i] & bit5[i % bit5.length]; - bit5_4[i] = bit5[i % bit5.length] & bit4[i % bit4.length]; - } - var wavetones = [ - bit17_5, bit5, bit5_4, bit5, - bit17, bit1, bit4, bit1 - ]; - - // registers - var regs = new Uint8Array(16); - var counters = new Float32Array(4); - var deltas = new Float32Array(4); - var volume = new Float32Array(4); - var audc = new Uint8Array(4); - var waveforms = [bit1, bit1, bit1, bit1]; - var buffer; - var sampleRate = 44100; - var clock, baseDelta; - var dirty = true; - - // - - this.setBufferLength = function (length) { - buffer = new Int32Array(length); - }; - - this.getBuffer = function () { - return buffer; - }; - - this.setSampleRate = function (rate) { - sampleRate = rate; - baseDelta = FREQ_17_EXACT / rate / 1.2; // TODO? - }; - - function updateValues(addr) { - var ctrl = regs[8]; - var base = (ctrl & CLOCK_15) ? DIV_15 : DIV_64; - var div; - var i = addr & 4; - var j = i>>1; - var k = i>>2; - if (ctrl & (CH1_CH2>>k)) { - if (ctrl & (CH1_179>>k)) - div = regs[i+2] * 256 + regs[i+0] + 7; - else - div = (regs[i+2] * 256 + regs[i+0] + 1) * base; - deltas[j+1] = baseDelta / div; - deltas[j+0] = 0; - } else { - if (ctrl & (CH1_179>>k)) { - div = regs[i+0] + 4; - } else { - div = (regs[i+0] + 1) * base; - } - deltas[j+0] = baseDelta / div; - div = (regs[i+2] + 1) * base; - deltas[j+1] = baseDelta / div; - } - //console.log(addr, ctrl.toString(16), div, deltas[j+0], deltas[j+1]); - } - - this.setRegister = function(addr, value) { - addr &= 0xf; - value &= 0xff; - if (regs[addr] != value) { - regs[addr] = value; - switch (addr) { - case 0: - case 2: - case 4: - case 6: // AUDF - case 8: // ctrl - dirty = true; - break; - case 1: - case 3: - case 5: - case 7: // AUDC - volume[addr>>1] = value & 0xf; - waveforms[addr>>1] = wavetones[value>>5]; - break; - } - } - } - - this.generate = function (length) { - if (dirty) { - updateValues(0); - updateValues(4); - dirty = false; - } - for (var s=0; s 0 && d < 1 && v > 0) { - var wav = waveforms[i]; - var cnt = counters[i] += d; - if (cnt > POLY17_SIZE+1) { - counters[i] -= POLY17_SIZE+1; - } - var on = wav[Math.floor(cnt % wav.length)]; - if (on) { - sample += v; - } - } - } - sample *= 273; - buffer[s] = sample; - buffer[s+1] = sample; - } - } -} - -////// CPU sound - -var CPUSoundChannel = function(cpu, clockRate) { - var sampleRate; - var buffer; - var lastbufpos=0; - var curSample=0; - var clocksPerSample; - - this.setBufferLength = function (length) { - buffer = new Int32Array(length); - }; - - this.getBuffer = function () { - return buffer; - }; - - this.setSampleRate = function (rate) { - sampleRate = rate; - }; - - this.getSetDACFunction = function() { - return function(a,v) { - var bufpos = Math.floor(cpu.getTstates() / clocksPerSample); - while (lastbufpos < bufpos) - buffer[lastbufpos++] = curSample; - lastbufpos = bufpos; - curSample = v; - }; - }; - - this.generate = function (length) { - clocksPerSample = clockRate * 1.0 / sampleRate; - var clocks = Math.round(length * clocksPerSample); - if (cpu.getTstates && cpu.runFrame) { - cpu.setTstates(0); - lastbufpos = 0; - cpu.runFrame(cpu.getTstates() + totalClocks); - while (lastbufpos < length) - buffer[lastbufpos++] = curSample; - } - }; -} - ////// 6502 var Base6502Platform = function() { diff --git a/src/platform/sound_williams.js b/src/platform/sound_williams.js new file mode 100644 index 00000000..98e13a2b --- /dev/null +++ b/src/platform/sound_williams.js @@ -0,0 +1,159 @@ +"use strict"; + +var WILLIAMS_SOUND_PRESETS = [ + {id:'minimal.c', name:'Minimal Test'}, +]; + +/**************************************************************************** + + Midway/Williams Audio Boards + ---------------------------- + + 6809 MEMORY MAP + + Function Address R/W Data + --------------------------------------------------------------- + Program RAM 0000-07FF R/W D0-D7 + + Music (YM-2151) 2000-2001 R/W D0-D7 + + 6821 PIA 4000-4003 R/W D0-D7 + + HC55516 clock low, digit latch 6000 W D0 + HC55516 clock high 6800 W xx + + Bank select 7800 W D0-D2 + + Banked Program ROM 8000-FFFF R D0-D7 + +****************************************************************************/ + +var WilliamsSoundPlatform = function(mainElement) { + var self = this; + this.__proto__ = new BaseZ80Platform(); + + var cpu, ram, rom, membus, iobus; + var audio, master; + var video, timer; + var command = 0; + var dac = 0; + var dac_float = 0.0 + var current_buffer; + var last_tstate; + var pixels; + + var cpuFrequency = 18432000/6; // 3.072 MHz + var cpuCyclesPerFrame = cpuFrequency/60; + var cpuAudioFactor = 32; + + function fillBuffer() { + var t = cpu.getTstates() / cpuAudioFactor; + while (last_tstate < t) { + current_buffer[last_tstate++] = dac_float; + } + } + + this.getPresets = function() { + return WILLIAMS_SOUND_PRESETS; + } + + this.start = function() { + ram = new RAM(0x400); + membus = { + read: new AddressDecoder([ + [0x0000, 0x3fff, 0x3fff, function(a) { return rom ? rom[a] : null; }], + [0x4000, 0x5fff, 0xfff, function(a) { return ram.mem[a]; }] + ]), + write: new AddressDecoder([ + [0x4000, 0x5fff, 0xfff, function(a,v) { ram.mem[a] = v; }], + ]), + isContended: function() { return false; }, + }; + iobus = { + read: function(addr) { + return command & 0xff; + }, + write: function(addr, val) { + dac = val & 0xff; + dac_float = ((dac & 0x80) ? -256+dac : dac) / 128.0; + fillBuffer(); + } + }; + cpu = window.Z80({ + display: {}, + memory: membus, + ioBus: iobus + }); + audio = new SampleAudio(cpuFrequency / cpuAudioFactor); + audio.callback = function(lbuf) { + if (self.isRunning()) { + cpu.setTstates(0); + current_buffer = lbuf; + last_tstate = 0; + self.runCPU(cpu, lbuf.length * cpuAudioFactor); + cpu.setTstates(lbuf.length * cpuAudioFactor); // TODO? + fillBuffer(); + for (var i=0; i<256; i++) { + var y = Math.round((current_buffer[i] * 127) + 128); + pixels[i + y*256] = 0xff33ff33; + } + } + }; + video = new RasterVideo(mainElement,256,256); + video.create(); + video.setKeyboardEvents(function(key,code,flags) { + var intr = (key-49); + if (intr >= 0 && (flags & 1)) { + command = intr & 0xff; + cpu.reset(); + } + }); + pixels = video.getFrameData(); + timer = new AnimationTimer(30, function() { + if (self.isRunning()) { + video.updateFrame(); + pixels.fill(0); + } + }); + } + + this.loadROM = function(title, data) { + rom = padBytes(data, 0x4000); + cpu.reset(); + } + + this.loadState = function(state) { + cpu.loadState(state.c); + ram.mem.set(state.b); + } + this.saveState = function() { + return { + c:self.getCPUState(), + b:ram.mem.slice(0), + }; + } + this.getCPUState = function() { + return cpu.saveState(); + } + + this.isRunning = function() { + return timer.isRunning(); + } + this.pause = function() { + timer.stop(); + audio.stop(); + } + this.resume = function() { + timer.start(); + audio.start(); + } + this.reset = function() { + cpu.reset(); + if (!this.getDebugCallback()) cpu.setTstates(0); // TODO? + } + this.readAddress = function(addr) { + return membus.read(addr); // TODO? + } +} + +PLATFORMS['sound_williams-z80'] = WilliamsSoundPlatform; diff --git a/src/platform/williams.js b/src/platform/williams.js index 6ea8859b..11f03d6a 100644 --- a/src/platform/williams.js +++ b/src/platform/williams.js @@ -25,6 +25,8 @@ var WilliamsPlatform = function(mainElement, proto) { var membus, iobus; var video_counter; + var audio, worker, workerchannel; + var xtal = 12000000; var cpuFrequency = xtal/3/4; var cpuCyclesPerFrame = cpuFrequency/60; // TODO @@ -126,8 +128,9 @@ var WilliamsPlatform = function(mainElement, proto) { var iowrite_williams = new AddressDecoder([ [0x0, 0xf, 0xf, setPalette], - [0x804, 0x807, 0x3, function(a,v) { console.log('iowrite',a); }], // TODO: sound - [0x80c, 0x80f, 0x3, function(a,v) { console.log('iowrite',a+4); }], // TODO: sound + [0x803, 0x803, 0xf, function(a,v) { if (worker) worker.postMessage({command:v}); }], + //[0x804, 0x807, 0x3, function(a,v) { console.log('iowrite',a); }], // TODO: sound + //[0x80c, 0x80f, 0x3, function(a,v) { console.log('iowrite',a+4); }], // TODO: sound [0x900, 0x9ff, 0, function(a,v) { banksel = v & 0x1; }], [0xa00, 0xa07, 0x7, setBlitter], [0xbff, 0xbff, 0, function(a,v) { if (v == 0x39) watchdog_counter = INITIAL_WATCHDOG; }], @@ -275,6 +278,12 @@ var WilliamsPlatform = function(mainElement, proto) { write: memwrite_williams, }; cpu = self.newCPU(membus); + + audio = new MasterAudio(); + worker = new Worker("./src/audio/z80worker.js"); + workerchannel = new WorkerSoundChannel(worker); + audio.master.addChannel(workerchannel); + video = new RasterVideo(mainElement, SCREEN_WIDTH, SCREEN_HEIGHT, {rotate:-90}); video.create(); $(video.canvas).click(function(e) { @@ -354,9 +363,11 @@ var WilliamsPlatform = function(mainElement, proto) { } this.pause = function() { timer.stop(); + audio.stop(); } this.resume = function() { timer.start(); + audio.start(); } this.reset = function() { cpu.reset(); diff --git a/src/worker/workermain.js b/src/worker/workermain.js index 36b9dca2..c69b3973 100644 --- a/src/worker/workermain.js +++ b/src/worker/workermain.js @@ -37,6 +37,12 @@ var PLATFORM_PARAMS = { data_start: 0xe000, data_size: 0x2000, }, + 'sound_williams-z80': { + code_start: 0x0, + code_size: 0x4000, + data_start: 0x4000, + data_size: 0x1000, + }, }; var loaded = {}