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pcjs/modules/pc8080/lib/chipset.js
Jeff Parsons e82a1d5b52 VT100 video buffer bias fixed
2016-08-02 18:53:01 -07:00

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/**
* @fileoverview Implements the PC8080 ChipSet component.
* @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
* @version 1.0
* Created 2016-Apr-25
*
* Copyright © 2012-2016 Jeff Parsons <Jeff@pcjs.org>
*
* This file is part of PCjs, a computer emulation software project at <http://pcjs.org/>.
*
* PCjs is free software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* PCjs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with PCjs. If not,
* see <http://www.gnu.org/licenses/gpl.html>.
*
* You are required to include the above copyright notice in every source code file of every
* copy or modified version of this work, and to display that copyright notice on every screen
* that loads or runs any version of this software (see COPYRIGHT in /modules/shared/lib/defines.js).
*
* Some PCjs files also attempt to load external resource files, such as character-image files,
* ROM files, and disk image files. Those external resource files are not considered part of PCjs
* for purposes of the GNU General Public License, and the author does not claim any copyright
* as to their contents.
*/
"use strict";
if (NODE) {
var str = require("../../shared/lib/strlib");
var usr = require("../../shared/lib/usrlib");
var web = require("../../shared/lib/weblib");
var Component = require("../../shared/lib/component");
var Messages = require("./messages");
var State = require("./state");
var CPUDef = require("./cpudef");
}
/**
* ChipSet(parmsChipSet)
*
* The ChipSet component has the following component-specific (parmsChipSet) properties:
*
* model: eg, "SI1978" (should be a member of ChipSet.MODELS)
* swDIP: eg, "00000000", where swDIP[0] is DIP0, swDIP[1] is DIP1, etc.
*
* @constructor
* @extends Component
* @param {Object} parmsChipSet
*/
function ChipSet(parmsChipSet)
{
Component.call(this, "ChipSet", parmsChipSet, ChipSet, Messages.CHIPSET);
var model = parmsChipSet['model'];
/*
* this.model is a numeric version of the 'model' string; when comparing this.model to "base"
* model numbers, you should generally compare (this.model|0) to the target value, which truncates it.
*/
if (model && !ChipSet.MODELS[model]) {
Component.notice("Unrecognized ChipSet model: " + model);
}
this.config = ChipSet.MODELS[model] || ChipSet.SI1978;
this.model = this.config.MODEL;
this.bSwitches = this.parseDIPSwitches(parmsChipSet['swDIP']);
/*
* Here, I'm finally getting around to trying the Web Audio API. Fortunately, based on what little I know about
* sound generation, using the API to make the same noises as the IBM PC speaker seems straightforward.
*
* To start, we create an audio context, unless the 'sound' parameter has been explicitly set to false.
*
* From:
*
* http://developer.apple.com/library/safari/#documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/PlayingandSynthesizingSounds/PlayingandSynthesizingSounds.html
*
* "Similar to how HTML5 canvas requires a context on which lines and curves are drawn, Web Audio requires an audio context
* on which sounds are played and manipulated. This context will be the parent object of further audio objects to come....
* Your audio context is typically created when your page initializes and should be long-lived. You can play multiple sounds
* coming from multiple sources within the same context, so it is unnecessary to create more than one audio context per page."
*/
this.fSpeaker = false;
if (parmsChipSet['sound']) {
this.classAudio = this.contextAudio = null;
if (window) {
this.classAudio = window['AudioContext'] || window['webkitAudioContext'];
}
if (this.classAudio) {
this.contextAudio = new this.classAudio();
} else {
if (DEBUG) this.log("AudioContext not available");
}
}
this.setReady();
}
Component.subclass(ChipSet);
ChipSet.SI1978 = {
MODEL: 1978.1,
STATUS0: { // NOTE: STATUS0 not used by the SI1978 ROMs; refer to STATUS1 instead
PORT: 0,
DIP4: 0x01, // self-test request at power up?
FIRE: 0x10, // 1 = fire
LEFT: 0x20, // 1 = left
RIGHT: 0x40, // 1 = right
PORT7: 0x80, // some connection to (undocumented) port 7
ALWAYS_SET: 0x0E // always set
},
STATUS1: {
PORT: 1,
CREDIT: 0x01, // credit (coin slot)
P2: 0x02, // 1 = 2P start
P1: 0x04, // 1 = 1P start
P1_FIRE: 0x10, // 1 = fire (P1 fire if cocktail machine?)
P1_LEFT: 0x20, // 1 = left (P1 left if cocktail machine?)
P1_RIGHT: 0x40, // 1 = right (P1 right if cocktail machine?)
ALWAYS_SET: 0x08 // always set
},
STATUS2: {
PORT: 2,
DIP3_5: 0x03, // 00 = 3 ships, 01 = 4 ships, 10 = 5 ships, 11 = 6 ships
TILT: 0x04, // 1 = tilt detected
DIP6: 0x08, // 0 = extra ship at 1500, 1 = extra ship at 1000
P2_FIRE: 0x10, // 1 = P2 fire (cocktail machines only?)
P2_LEFT: 0x20, // 1 = P2 left (cocktail machines only?)
P2_RIGHT: 0x40, // 1 = P2 right (cocktail machines only?)
DIP7: 0x80, // 0 = display coin info on demo ("attract") screen
ALWAYS_SET: 0x00
},
SHIFT_RESULT: { // bits 0-7 of barrel shifter result
PORT: 3
},
SHIFT_COUNT: {
PORT: 2,
MASK: 0x07
},
SOUND1: {
PORT: 3,
UFO: 0x01,
SHOT: 0x02,
PDEATH: 0x04,
IDEATH: 0x08,
EXPLAY: 0x10,
AMP_ENABLE: 0x20
},
SHIFT_DATA: {
PORT: 4
},
SOUND2: {
PORT: 5,
FLEET1: 0x01,
FLEET2: 0x02,
FLEET3: 0x04,
FLEET4: 0x08,
UFO_HIT: 0x10
}
};
ChipSet.VT100 = {
MODEL: 100.0,
FLAGS_BUFFER: {
PORT: 0x42, // read-only
XMIT: 0x01, // active if SET
NO_AVO: 0x02, // AVO present if CLEAR
NO_GFX: 0x04, // VT125 graphics board present if CLEAR
OPTION: 0x08, // OPTION present if SET
NO_EVEN: 0x10, // EVEN FIELD active if CLEAR
NVR_DATA: 0x20, // NVR DATA if SET
NVR_CLK: 0x40, // NVR CLOCK if SET
KBD_XMIT: 0x80 // KBD XMIT BUFFER empty if SET
},
BRIGHTNESS_LATCH: {
PORT: 0x42, // write-only
INIT: 0x00
},
NVR_LATCH: {
PORT: 0x62, // write-only
INIT: 0x00
},
DC012: { // generates scan counts for the Video Processor
PORT: 0xA2, // write-only
INIT: 0x00
},
DC011: { // generates Line Buffer Addresses (LBAs) for the Video Processor
PORT: 0xC2, // write-only
INIT: 0x00
},
LBA: { // used to simulate LBA0 through LBA7 (LBA7 is used to drive NVR_CLK)
INIT: 0x00
}
};
/*
* Supported model strings
*/
ChipSet.MODELS = {
"SI1978": ChipSet.SI1978,
"VT100": ChipSet.VT100
};
/**
* parseDIPSwitches(sBits, bDefault)
*
* @this {ChipSet}
* @param {string} sBits describing switch settings
* @param {number} [bDefault]
* @return {number|undefined}
*/
ChipSet.prototype.parseDIPSwitches = function(sBits, bDefault)
{
var b = bDefault;
if (sBits) {
/*
* NOTE: We can't use parseInt() with a base of 2, because both bit order and bit sense are reversed.
*/
b = 0;
var bit = 0x1;
for (var i = 0; i < sBits.length; i++) {
if (sBits.charAt(i) == "0") b |= bit;
bit <<= 1;
}
}
return b;
};
/**
* setBinding(sHTMLType, sBinding, control, sValue)
*
* @this {ChipSet}
* @param {string|null} sHTMLType is the type of the HTML control (eg, "button", "list", "text", "submit", "textarea", "canvas")
* @param {string} sBinding is the value of the 'binding' parameter stored in the HTML control's "data-value" attribute (eg, "sw1")
* @param {Object} control is the HTML control DOM object (eg, HTMLButtonElement)
* @param {string} [sValue] optional data value
* @return {boolean} true if binding was successful, false if unrecognized binding request
*/
ChipSet.prototype.setBinding = function(sHTMLType, sBinding, control, sValue)
{
return false;
};
/**
* initBus(cmp, bus, cpu, dbg)
*
* @this {ChipSet}
* @param {Computer} cmp
* @param {Bus} bus
* @param {CPUState} cpu
* @param {Debugger} dbg
*/
ChipSet.prototype.initBus = function(cmp, bus, cpu, dbg)
{
this.bus = bus;
this.cpu = cpu;
this.dbg = dbg;
this.cmp = cmp;
bus.addPortInputTable(this, this.config.portsInput);
bus.addPortOutputTable(this, this.config.portsOutput);
};
/**
* powerUp(data, fRepower)
*
* @this {ChipSet}
* @param {Object|null} data
* @param {boolean} [fRepower]
* @return {boolean} true if successful, false if failure
*/
ChipSet.prototype.powerUp = function(data, fRepower)
{
if (!fRepower) {
if (!data) {
this.reset();
} else {
if (!this.restore(data)) return false;
}
}
return true;
};
/**
* powerDown(fSave, fShutdown)
*
* @this {ChipSet}
* @param {boolean} [fSave]
* @param {boolean} [fShutdown]
* @return {Object|boolean} component state if fSave; otherwise, true if successful, false if failure
*/
ChipSet.prototype.powerDown = function(fSave, fShutdown)
{
return fSave? this.save() : true;
};
ChipSet.SI1978.init = [
[
ChipSet.SI1978.STATUS0.ALWAYS_SET,
ChipSet.SI1978.STATUS1.ALWAYS_SET,
ChipSet.SI1978.STATUS2.ALWAYS_SET,
0, 0, 0, 0
]
];
ChipSet.VT100.init = [
[
ChipSet.VT100.BRIGHTNESS_LATCH.INIT,
ChipSet.VT100.NVR_LATCH.INIT,
ChipSet.VT100.FLAGS_BUFFER.NO_AVO | ChipSet.VT100.FLAGS_BUFFER.NO_GFX,
ChipSet.VT100.DC012.INIT,
ChipSet.VT100.DC011.INIT,
ChipSet.VT100.LBA.INIT
]
];
/**
* reset()
*
* @this {ChipSet}
*/
ChipSet.prototype.reset = function()
{
if (!this.restore(this.config.init)) {
this.notice("reset error");
}
};
/**
* save()
*
* This implements save support for the ChipSet component.
*
* @this {ChipSet}
* @return {Object}
*/
ChipSet.prototype.save = function()
{
var state = new State(this);
switch(this.model) {
case ChipSet.SI1978.MODEL:
state.set(0, [this.bStatus0, this.bStatus1, this.bStatus2, this.wShiftData, this.bShiftCount, this.bSound1, this.bSound2]);
break;
case ChipSet.VT100.MODEL:
state.set(0, [this.bBrightnessLatch, this.bNVRLatch, this.bFlagsBuffer, this.bDC012, this.bDC011, this.bLBA]);
break;
}
return state.data();
};
/**
* restore(data)
*
* This implements restore support for the ChipSet component.
*
* @this {ChipSet}
* @param {Object} data
* @return {boolean} true if successful, false if failure
*/
ChipSet.prototype.restore = function(data)
{
var a;
if (data && (a = data[0]) && a.length) {
switch(this.model) {
case ChipSet.SI1978.MODEL:
this.bStatus0 = a[0];
this.bStatus1 = a[1];
this.bStatus2 = a[2];
this.wShiftData = a[3];
this.bShiftCount = a[4];
this.bSound1 = a[5];
this.bSound2 = a[6];
return true;
case ChipSet.VT100.MODEL:
this.bBrightnessLatch = a[0];
this.bNVRLatch = a[1];
this.bFlagsBuffer = a[2];
this.bDC012 = a[3];
this.bDC011 = a[4];
this.bLBA = a[5];
return true;
}
}
return false;
};
/**
* start()
*
* Notification from the CPU that it's starting.
*
* @this {ChipSet}
*/
ChipSet.prototype.start = function()
{
/*
* Currently, all we (may) do with this notification is allow the speaker to make noise.
*/
};
/**
* stop()
*
* Notification from the CPU that it's stopping.
*
* @this {ChipSet}
*/
ChipSet.prototype.stop = function()
{
/*
* Currently, all we (may) do with this notification is prevent the speaker from making noise.
*/
};
/**
* updateStatus0(bit, fSet)
*
* @this {ChipSet}
* @param {number} bit
* @param {boolean} fSet
*/
ChipSet.prototype.updateStatus0 = function(bit, fSet)
{
this.bStatus0 &= ~bit;
if (fSet) this.bStatus0 |= bit;
};
/**
* updateStatus1(bit, fSet)
*
* @this {ChipSet}
* @param {number} bit
* @param {boolean} fSet
*/
ChipSet.prototype.updateStatus1 = function(bit, fSet)
{
this.bStatus1 &= ~bit;
if (fSet) this.bStatus1 |= bit;
};
/**
* updateStatus2(bit, fSet)
*
* @this {ChipSet}
* @param {number} bit
* @param {boolean} fSet
*/
ChipSet.prototype.updateStatus2 = function(bit, fSet)
{
this.bStatus2 &= ~bit;
if (fSet) this.bStatus2 |= bit;
};
/**
* inSIStatus0(port, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x00)
* @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
* @return {number} simulated port value
*/
ChipSet.prototype.inSIStatus0 = function(port, addrFrom)
{
var b = this.bStatus0;
this.printMessageIO(port, null, addrFrom, "STATUS0", b, true);
return b;
};
/**
* inSIStatus1(port, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x01)
* @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
* @return {number} simulated port value
*/
ChipSet.prototype.inSIStatus1 = function(port, addrFrom)
{
var b = this.bStatus1;
this.printMessageIO(port, null, addrFrom, "STATUS1", b, true);
return b;
};
/**
* inSIStatus2(port, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x02)
* @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
* @return {number} simulated port value
*/
ChipSet.prototype.inSIStatus2 = function(port, addrFrom)
{
var b = this.bStatus2;
this.printMessageIO(port, null, addrFrom, "STATUS2", b, true);
return b;
};
/**
* inSIShiftResult(port, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x03)
* @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
* @return {number} simulated port value
*/
ChipSet.prototype.inSIShiftResult = function(port, addrFrom)
{
var b = (this.wShiftData >> (8 - this.bShiftCount)) & 0xff;
this.printMessageIO(port, null, addrFrom, "SHIFT.RESULT", b, true);
return b;
};
/**
* outSIShiftCount(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x02)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outSIShiftCount = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "SHIFT.COUNT", null, true);
this.bShiftCount = b;
};
/**
* outSISound1(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x03)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outSISound1 = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "SOUND1", null, true);
this.bSound1 = b;
};
/**
* outSIShiftData(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x04)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outSIShiftData = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "SHIFT.DATA", null, true);
this.wShiftData = (b << 8) | (this.wShiftData >> 8);
};
/**
* outSISound2(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x05)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outSISound2 = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "SOUND2", null, true);
this.bSound2 = b;
};
/**
* outSIWatchdog(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x06)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outSIWatchdog = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "WATCHDOG", null, true);
};
/**
* inVT100FlagsBuffer(port, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x42)
* @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
* @return {number} simulated port value
*/
ChipSet.prototype.inVT100FlagsBuffer = function(port, addrFrom)
{
this.bLBA++;
var b = this.bFlagsBuffer = (this.bFlagsBuffer & ~ChipSet.VT100.FLAGS_BUFFER.NVR_CLK) | ((this.bLBA & 0x80)? ChipSet.VT100.FLAGS_BUFFER.NVR_CLK : 0);
this.printMessageIO(port, null, addrFrom, "FLAGS.BUFFER", b, true);
return b;
};
/**
* outVT100BrightnessLatch(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x42)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outVT100BrightnessLatch = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "BRIGHTNESS.LATCH", null, true);
this.bBrightnessLatch = b;
};
/**
* outVT100NVRLatch(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0x62)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outVT100NVRLatch = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "NVR.LATCH", null, true);
this.bNVRLatch = b;
};
/**
* outVT100DC012(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0xA2)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outVT100DC012 = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "DC012", null, true);
this.bDC012 = b;
};
/**
* outVT100DC011(port, b, addrFrom)
*
* @this {ChipSet}
* @param {number} port (0xC2)
* @param {number} b
* @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
*/
ChipSet.prototype.outVT100DC011 = function(port, b, addrFrom)
{
this.printMessageIO(port, b, addrFrom, "DC011", null, true);
this.bDC011 = b;
};
/*
* Port notification tables
*/
ChipSet.SI1978.portsInput = {
0x00: ChipSet.prototype.inSIStatus0,
0x01: ChipSet.prototype.inSIStatus1,
0x02: ChipSet.prototype.inSIStatus2,
0x03: ChipSet.prototype.inSIShiftResult
};
ChipSet.SI1978.portsOutput = {
0x02: ChipSet.prototype.outSIShiftCount,
0x03: ChipSet.prototype.outSISound1,
0x04: ChipSet.prototype.outSIShiftData,
0x05: ChipSet.prototype.outSISound2,
0x06: ChipSet.prototype.outSIWatchdog
};
ChipSet.VT100.portsInput = {
0x42: ChipSet.prototype.inVT100FlagsBuffer
};
ChipSet.VT100.portsOutput = {
0x42: ChipSet.prototype.outVT100BrightnessLatch,
0x62: ChipSet.prototype.outVT100NVRLatch,
0xA2: ChipSet.prototype.outVT100DC012,
0xC2: ChipSet.prototype.outVT100DC011
};
/**
* ChipSet.init()
*
* This function operates on every HTML element of class "chipset", extracting the
* JSON-encoded parameters for the ChipSet constructor from the element's "data-value"
* attribute, invoking the constructor to create a ChipSet component, and then binding
* any associated HTML controls to the new component.
*/
ChipSet.init = function()
{
var aeChipSet = Component.getElementsByClass(document, PC8080.APPCLASS, "chipset");
for (var iChip = 0; iChip < aeChipSet.length; iChip++) {
var eChipSet = aeChipSet[iChip];
var parmsChipSet = Component.getComponentParms(eChipSet);
var chipset = new ChipSet(parmsChipSet);
Component.bindComponentControls(chipset, eChipSet, PC8080.APPCLASS);
}
};
/*
* Initialize every ChipSet module on the page.
*/
web.onInit(ChipSet.init);
if (NODE) module.exports = ChipSet;
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