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display.js
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// display emulation routines for EstyJs
// written by Darren Coles
"use strict";
EstyJs.Display = function (opts) {
var self = {};
var memory = opts.memory;
var ramDv = memory.getRamDv();
var output = opts.output;
var fdc = opts.fdc;
var processor = opts.processor;
var flipFlop = false;
var element = document.getElementById(output);
var context = element.getContext("2d");
var imageData = context.createImageData(640, 512);
var bigEndian = false;
var buf8 = null;
var data = null;
if (typeof (imageData.data) != 'undefined') {
buf8 = new Uint8Array(imageData.data.buffer);
data = new Uint32Array(imageData.data.buffer);
data[0] = 0x01020304;
if (buf8[0] = 0x04) {
bigEndian = false;
} else {
bigEndian = true;
}
}
else {
data = imageData.data;
}
var syncMode = 2; //50hz
var screenMode = 0; //lo-res
var screenStart = 0;
var screenRowStart = 0;
var palette8 = new Uint8Array(32);
var paletteConverted = new Uint32Array(16);
var frameRate = 0;
var frameSkip = false;
var showSpeedPct = false;
var widths = new Uint8Array([160, 160, 160]);
var rowCount = 0;
self.beamRow = 0;
self.displayOn = true;
var pixelIndex = 0;
self.reset = function () {
}
function readPaletteValue(reg) {
reg = reg << 1;
return (palette8[reg] << 8) + palette8[reg + 1];
}
function convertPalette() {
for (var i = 0; i < 16; i++) {
var c = readPaletteValue(i);
var b = ((c & 0x7) << 1); //|1;
var g = ((c & 0x70) << 1) >> 4; // | 0x10;
var r = ((c & 0x700) << 1) >> 8; // | 0x100;
if (bigEndian) {
paletteConverted[i] = (((r << 4) | r) << 24) | (((g << 4) | g) << 16) | (((b << 4) | b) << 8) | 0x000000ff;
} else {
paletteConverted[i] = (((r << 4) | r)) | (((g << 4) | g) << 8) | (((b << 4) | b) << 16) | 0xff000000;
}
}
}
function optimisedScreenDraw() {
var scrnAddr;
var colour;
var m;
var m1, m2;
var x = 0;
var y = self.beamRow;
//convertPalette();
switch (screenMode & 3) {
case 0:
//lo-res
scrnAddr = screenRowStart;
for (x = 0; x < 20; x++) {
//m1 = memory.readLong(scrnAddr);
//m2 = memory.readLong(scrnAddr + 4);
m1 = ramDv.getInt32(scrnAddr, false);
m2 = ramDv.getInt32(scrnAddr + 4,false);
scrnAddr += 8;
colour = paletteConverted[((m1 & 0x80000000) >>> 31) | ((m1 & 0x8000) >> 14) | ((m2 & 0x80000000) >>> 29) | ((m2 & 0x8000) >> 12)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x40000000) >> 30) | ((m1 & 0x4000) >> 13) | ((m2 & 0x40000000) >> 28) | ((m2 & 0x4000) >> 11)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x20000000) >> 29) | ((m1 & 0x2000) >> 12) | ((m2 & 0x20000000) >> 27) | ((m2 & 0x2000) >> 10)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x10000000) >> 28) | ((m1 & 0x1000) >> 11) | ((m2 & 0x10000000) >> 26) | ((m2 & 0x1000) >> 9)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x8000000) >> 27) | ((m1 & 0x800) >> 10) | ((m2 & 0x8000000) >> 25) | ((m2 & 0x800) >> 8)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x4000000) >> 26) | ((m1 & 0x400) >> 9) | ((m2 & 0x4000000) >> 24) | ((m2 & 0x400) >> 7)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x2000000) >> 25) | ((m1 & 0x200) >> 8) | ((m2 & 0x2000000) >> 23) | ((m2 & 0x200) >> 6)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x1000000) >> 24) | ((m1 & 0x100) >> 7) | ((m2 & 0x1000000) >> 22) | ((m2 & 0x100) >> 5)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x800000) >> 23) | ((m1 & 0x80) >> 6) | ((m2 & 0x800000) >> 21) | ((m2 & 0x80) >> 4)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x400000) >> 22) | ((m1 & 0x40) >> 5) | ((m2 & 0x400000) >> 20) | ((m2 & 0x40) >> 3)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x200000) >> 21) | ((m1 & 0x20) >> 4) | ((m2 & 0x200000) >> 19) | ((m2 & 0x20) >> 2)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x100000) >> 20) | ((m1 & 0x10) >> 3) | ((m2 & 0x100000) >> 18) | ((m2 & 0x10) >> 1)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x80000) >> 19) | ((m1 & 0x8) >> 2) | ((m2 & 0x80000) >> 17) | ((m2 & 0x8))];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x40000) >> 18) | ((m1 & 0x4) >> 1) | ((m2 & 0x40000) >> 16) | ((m2 & 0x4) << 1)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x20000) >> 17) | ((m1 & 0x2)) | ((m2 & 0x20000) >> 15) | ((m2 & 0x2) << 2)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x10000) >> 16) | ((m1 & 0x1) << 1) | ((m2 & 0x10000) >> 14) | ((m2 & 0x1) << 3)];
data[pixelIndex++] = colour;
data[pixelIndex++] = colour;
}
pixelIndex += 640;
break;
case 1:
//med res
scrnAddr = screenRowStart;
for (x = 0; x < 40; x++) {
//m1 = memory.readLong(scrnAddr);
m1 = ramDv.getInt32(scrnAddr, false);
scrnAddr += 4;
colour = paletteConverted[((m1 & 0x80000000) >>> 31) | ((m1 & 0x8000) >> 14)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x40000000) >> 30) | ((m1 & 0x4000) >> 13)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x20000000) >> 29) | ((m1 & 0x2000) >> 12)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x10000000) >> 28) | ((m1 & 0x1000) >> 11)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x8000000) >> 27) | ((m1 & 0x800) >> 10)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x4000000) >> 26) | ((m1 & 0x400) >> 9)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x2000000) >> 25) | ((m1 & 0x200) >> 8)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x1000000) >> 24) | ((m1 & 0x100) >> 7)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x800000) >> 23) | ((m1 & 0x80) >> 6)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x400000) >> 22) | ((m1 & 0x40) >> 5)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x200000) >> 21) | ((m1 & 0x20) >> 4)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x100000) >> 20) | ((m1 & 0x10) >> 3)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x80000) >> 19) | ((m1 & 0x8) >> 2)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x40000) >> 18) | ((m1 & 0x4) >> 1)];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x20000) >> 17) | ((m1 & 0x2))];
data[pixelIndex++] = colour;
colour = paletteConverted[((m1 & 0x10000) >> 16) | ((m1 & 0x1) << 1)];
data[pixelIndex++] = colour;
}
pixelIndex += 640;
break;
case 2:
//high res
scrnAddr = screenRowStart;
for (x = 0; x < 80; x++) {
m = memory.readByte(scrnAddr++);
colour = paletteConverted[(m & 0x80) >> 7];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x40) >> 6];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x20) >> 5];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x10) >> 4];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x8) >> 3];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x4) >> 2];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x2) >> 1];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x1)];
data[pixelIndex++] = colour;
}
for (x = 0; x < 80; x++) {
m = memory.readByte(scrnAddr++);
colour = paletteConverted[(m & 0x80) >> 7];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x40) >> 6];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x20) >> 5];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x10) >> 4];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x8) >> 3];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x4) >> 2];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x2) >> 1];
data[pixelIndex++] = colour;
colour = paletteConverted[(m & 0x1)];
data[pixelIndex++] = colour;
}
break;
default:
break;
}
}
function standardScreenDraw() {
var scrnAddr;
var colour;
var m;
var m1, m2;
var x = 0;
var y = self.beamRow;
//convertPalette();
switch (screenMode & 3) {
case 0:
//lo-res
scrnAddr = screenRowStart;
for (x = 0; x < 20; x++) {
m1 = memory.readLong(scrnAddr);
m2 = memory.readLong(scrnAddr + 4);
scrnAddr += 8;
colour = paletteConverted[((m1 & 0x80000000) >>> 31) | ((m1 & 0x8000) >> 14) | ((m2 & 0x80000000) >>> 29) | ((m2 & 0x8000) >> 12)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x40000000) >> 30) | ((m1 & 0x4000) >> 13) | ((m2 & 0x40000000) >> 28) | ((m2 & 0x4000) >> 11)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x20000000) >> 29) | ((m1 & 0x2000) >> 12) | ((m2 & 0x20000000) >> 27) | ((m2 & 0x2000) >> 10)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x10000000) >> 28) | ((m1 & 0x1000) >> 11) | ((m2 & 0x10000000) >> 26) | ((m2 & 0x1000) >> 9)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x8000000) >> 27) | ((m1 & 0x800) >> 10) | ((m2 & 0x8000000) >> 25) | ((m2 & 0x800) >> 8)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x4000000) >> 26) | ((m1 & 0x400) >> 9) | ((m2 & 0x4000000) >> 24) | ((m2 & 0x400) >> 7)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x2000000) >> 25) | ((m1 & 0x200) >> 8) | ((m2 & 0x2000000) >> 23) | ((m2 & 0x200) >> 6)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x1000000) >> 24) | ((m1 & 0x100) >> 7) | ((m2 & 0x1000000) >> 22) | ((m2 & 0x100) >> 5)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x800000) >> 23) | ((m1 & 0x80) >> 6) | ((m2 & 0x800000) >> 21) | ((m2 & 0x80) >> 4)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x400000) >> 22) | ((m1 & 0x40) >> 5) | ((m2 & 0x400000) >> 20) | ((m2 & 0x40) >> 3)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x200000) >> 21) | ((m1 & 0x20) >> 4) | ((m2 & 0x200000) >> 19) | ((m2 & 0x20) >> 2)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x100000) >> 20) | ((m1 & 0x10) >> 3) | ((m2 & 0x100000) >> 18) | ((m2 & 0x10) >> 1)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x80000) >> 19) | ((m1 & 0x8) >> 2) | ((m2 & 0x80000) >> 17) | ((m2 & 0x8))];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x40000) >> 18) | ((m1 & 0x4) >> 1) | ((m2 & 0x40000) >> 16) | ((m2 & 0x4) << 1)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x20000) >> 17) | ((m1 & 0x2)) | ((m2 & 0x20000) >> 15) | ((m2 & 0x2) << 2)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x10000) >> 16) | ((m1 & 0x1) << 1) | ((m2 & 0x10000) >> 14) | ((m2 & 0x1) << 3)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
}
pixelIndex += 2560;
break;
case 1:
//med res
scrnAddr = screenRowStart;
for (x = 0; x < 40; x++) {
m1 = memory.readLong(scrnAddr, true);
scrnAddr += 4;
colour = paletteConverted[((m1 & 0x80000000) >>> 31) | ((m1 & 0x8000) >> 14)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x40000000) >> 30) | ((m1 & 0x4000) >> 13)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x20000000) >> 29) | ((m1 & 0x2000) >> 12)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x10000000) >> 28) | ((m1 & 0x1000) >> 11)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x8000000) >> 27) | ((m1 & 0x800) >> 10)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x4000000) >> 26) | ((m1 & 0x400) >> 9)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x2000000) >> 25) | ((m1 & 0x200) >> 8)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x1000000) >> 24) | ((m1 & 0x100) >> 7)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x800000) >> 23) | ((m1 & 0x80) >> 6)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x400000) >> 22) | ((m1 & 0x40) >> 5)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x200000) >> 21) | ((m1 & 0x20) >> 4)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x100000) >> 20) | ((m1 & 0x10) >> 3)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x80000) >> 19) | ((m1 & 0x8) >> 2)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x40000) >> 18) | ((m1 & 0x4) >> 1)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x20000) >> 17) | ((m1 & 0x2))];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[((m1 & 0x10000) >> 16) | ((m1 & 0x1) << 1)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
}
pixelIndex += 2560;
break;
case 2:
//high res
scrnAddr = screenRowStart;
for (x = 0; x < 80; x++) {
m = memory.readByte(scrnAddr++, true);
colour = paletteConverted[(m & 0x80) >> 7];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x40) >> 6];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x20) >> 5];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x10) >> 4];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x8) >> 3];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x4) >> 2];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x2) >> 1];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x1)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
}
for (x = 0; x < 80; x++) {
m = memory.readByte(scrnAddr++, true);
colour = paletteConverted[(m & 0x80) >> 7];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x40) >> 6];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x20) >> 5];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x10) >> 4];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x8) >> 3];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x4) >> 2];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x2) >> 1];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
colour = paletteConverted[(m & 0x1)];
data[pixelIndex++] = colour & 0xff;
data[pixelIndex++] = (colour & 0xff00) >> 8;
data[pixelIndex++] = (colour & 0xff0000) >> 16;
data[pixelIndex++] = 255;
}
break;
default:
break;
}
}
self.startFrame = function () {
flipFlop = !flipFlop;
if (!frameSkip) flipFlop = true;
if (flipFlop) {
if (imageData != null) {
//if (buf8 != null) imageData.data.set(buf8);
context.putImageData(imageData, 0, 0); // at coords 0,0
var text = fdc.getDisplayData();
context.fillStyle = "White";
context.font = "bold 16px Arial";
if (text.length > 0) {
context.fillText(text[0], 600, 380);
}
if (text.length > 1) {
context.fillText(text[1], 600, 395);
}
if (showSpeedPct) context.fillText(frameRate.toFixed(2) + "%", 10, 15);
}
}
self.beamRow = 0;
screenRowStart = screenStart;
rowCount = 0;
pixelIndex = 0;
}
self.startRow = function () {
if (self.beamRow < 63 | self.beamRow >= 263) {
self.displayOn = false;
return;
}
self.displayOn = true;
convertPalette();
}
self.processRow = function () {
if (self.beamRow < 63 | self.beamRow >= 263) {
self.beamRow++;
return;
}
if (screenRowStart < 0xfffff && (flipFlop)) {
if (buf8 != null) {
optimisedScreenDraw();
}
else {
standardScreenDraw();
}
}
screenRowStart += widths[screenMode & 3];
self.beamRow++
rowCount++;
}
self.setDisplayStartHi = function (val) {
screenStart = screenStart & 0x00ffff | val << 16;
}
self.setDisplayStartMed = function (val) {
screenStart = screenStart & 0xff00ff | val << 8;
}
self.getDisplayStart = function () {
return screenStart;
}
self.getCurrentAddress = function () {
return screenRowStart + ((Math.min(320, Math.max(0, processor.getRowCycleCount() - 68)) >> 2) << 1);
}
self.getSyncMode = function () {
return syncMode;
}
self.setSyncMode = function (val) {
syncMode = val;
}
self.readPaletteReg = function (reg) {
return palette8[reg];
}
self.writePaletteReg = function (reg, val) {
palette8[reg] = val;
}
self.readScreenMode = function () {
return screenMode;
}
self.writeScreenMode = function (val) {
screenMode = val;
}
self.setFrameRate = function (val) {
frameRate = val;
}
self.setFrameSkip = function (val) {
frameSkip = val;
}
self.setShowSpeedPct = function (val) {
showSpeedPct = val;
}
self.setSnapshotRegs = function (data) {
screenStart = data.screenAddr;
screenMode = data.screenMode;
for (var i = 0; i < 32; i++) {
palette8[i] = data.palette[i];
}
}
return self;
}