forked from chromium/octane
/
gbemu-part2.js
9780 lines (9756 loc) · 454 KB
/
gbemu-part2.js
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// Portions copyright 2013 Google, Inc
// Copyright (C) 2010 - 2012 Grant Galitz
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
// The full license is available at http://www.gnu.org/licenses/gpl.html
// This program 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.
// The code has been adapted for use as a benchmark by Google.
// Previous files are in gbemu-part1.js, since they need to run in sloppy mode.
// Start of js/GameBoyCore.js file.
"use strict";
/*
* JavaScript GameBoy Color Emulator
* Copyright (C) 2010 - 2012 Grant Galitz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
* The full license is available at http://www.gnu.org/licenses/gpl.html
*
* This program 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.
*
*/
function GameBoyCore(canvas, ROMImage) {
//Params, etc...
this.canvas = canvas; //Canvas DOM object for drawing out the graphics to.
this.drawContext = null; // LCD Context
this.ROMImage = ROMImage; //The game's ROM.
//CPU Registers and Flags:
this.registerA = 0x01; //Register A (Accumulator)
this.FZero = true; //Register F - Result was zero
this.FSubtract = false; //Register F - Subtraction was executed
this.FHalfCarry = true; //Register F - Half carry or half borrow
this.FCarry = true; //Register F - Carry or borrow
this.registerB = 0x00; //Register B
this.registerC = 0x13; //Register C
this.registerD = 0x00; //Register D
this.registerE = 0xD8; //Register E
this.registersHL = 0x014D; //Registers H and L combined
this.stackPointer = 0xFFFE; //Stack Pointer
this.programCounter = 0x0100; //Program Counter
//Some CPU Emulation State Variables:
this.CPUCyclesTotal = 0; //Relative CPU clocking to speed set, rounded appropriately.
this.CPUCyclesTotalBase = 0; //Relative CPU clocking to speed set base.
this.CPUCyclesTotalCurrent = 0; //Relative CPU clocking to speed set, the directly used value.
this.CPUCyclesTotalRoundoff = 0; //Clocking per iteration rounding catch.
this.baseCPUCyclesPerIteration = 0; //CPU clocks per iteration at 1x speed.
this.remainingClocks = 0; //HALT clocking overrun carry over.
this.inBootstrap = true; //Whether we're in the GBC boot ROM.
this.usedBootROM = false; //Updated upon ROM loading...
this.usedGBCBootROM = false; //Did we boot to the GBC boot ROM?
this.halt = false; //Has the CPU been suspended until the next interrupt?
this.skipPCIncrement = false; //Did we trip the DMG Halt bug?
this.stopEmulator = 3; //Has the emulation been paused or a frame has ended?
this.IME = true; //Are interrupts enabled?
this.IRQLineMatched = 0; //CPU IRQ assertion.
this.interruptsRequested = 0; //IF Register
this.interruptsEnabled = 0; //IE Register
this.hdmaRunning = false; //HDMA Transfer Flag - GBC only
this.CPUTicks = 0; //The number of clock cycles emulated.
this.doubleSpeedShifter = 0; //GBC double speed clocking shifter.
this.JoyPad = 0xFF; //Joypad State (two four-bit states actually)
this.CPUStopped = false; //CPU STOP status.
//Main RAM, MBC RAM, GBC Main RAM, VRAM, etc.
this.memoryReader = []; //Array of functions mapped to read back memory
this.memoryWriter = []; //Array of functions mapped to write to memory
this.memoryHighReader = []; //Array of functions mapped to read back 0xFFXX memory
this.memoryHighWriter = []; //Array of functions mapped to write to 0xFFXX memory
this.ROM = []; //The full ROM file dumped to an array.
this.memory = []; //Main Core Memory
this.MBCRam = []; //Switchable RAM (Used by games for more RAM) for the main memory range 0xA000 - 0xC000.
this.VRAM = []; //Extra VRAM bank for GBC.
this.GBCMemory = []; //GBC main RAM Banks
this.MBC1Mode = false; //MBC1 Type (4/32, 16/8)
this.MBCRAMBanksEnabled = false; //MBC RAM Access Control.
this.currMBCRAMBank = 0; //MBC Currently Indexed RAM Bank
this.currMBCRAMBankPosition = -0xA000; //MBC Position Adder;
this.cGBC = false; //GameBoy Color detection.
this.gbcRamBank = 1; //Currently Switched GameBoy Color ram bank
this.gbcRamBankPosition = -0xD000; //GBC RAM offset from address start.
this.gbcRamBankPositionECHO = -0xF000; //GBC RAM (ECHO mirroring) offset from address start.
this.RAMBanks = [0, 1, 2, 4, 16]; //Used to map the RAM banks to maximum size the MBC used can do.
this.ROMBank1offs = 0; //Offset of the ROM bank switching.
this.currentROMBank = 0; //The parsed current ROM bank selection.
this.cartridgeType = 0; //Cartridge Type
this.name = ""; //Name of the game
this.gameCode = ""; //Game code (Suffix for older games)
this.fromSaveState = false; //A boolean to see if this was loaded in as a save state.
this.savedStateFileName = ""; //When loaded in as a save state, this will not be empty.
this.STATTracker = 0; //Tracker for STAT triggering.
this.modeSTAT = 0; //The scan line mode (for lines 1-144 it's 2-3-0, for 145-154 it's 1)
this.spriteCount = 252; //Mode 3 extra clocking counter (Depends on how many sprites are on the current line.).
this.LYCMatchTriggerSTAT = false; //Should we trigger an interrupt if LY==LYC?
this.mode2TriggerSTAT = false; //Should we trigger an interrupt if in mode 2?
this.mode1TriggerSTAT = false; //Should we trigger an interrupt if in mode 1?
this.mode0TriggerSTAT = false; //Should we trigger an interrupt if in mode 0?
this.LCDisOn = false; //Is the emulated LCD controller on?
this.LINECONTROL = []; //Array of functions to handle each scan line we do (onscreen + offscreen)
this.DISPLAYOFFCONTROL = [function (parentObj) {
//Array of line 0 function to handle the LCD controller when it's off (Do nothing!).
}];
this.LCDCONTROL = null; //Pointer to either LINECONTROL or DISPLAYOFFCONTROL.
this.initializeLCDController(); //Compile the LCD controller functions.
//RTC (Real Time Clock for MBC3):
this.RTCisLatched = false;
this.latchedSeconds = 0; //RTC latched seconds.
this.latchedMinutes = 0; //RTC latched minutes.
this.latchedHours = 0; //RTC latched hours.
this.latchedLDays = 0; //RTC latched lower 8-bits of the day counter.
this.latchedHDays = 0; //RTC latched high-bit of the day counter.
this.RTCSeconds = 0; //RTC seconds counter.
this.RTCMinutes = 0; //RTC minutes counter.
this.RTCHours = 0; //RTC hours counter.
this.RTCDays = 0; //RTC days counter.
this.RTCDayOverFlow = false; //Did the RTC overflow and wrap the day counter?
this.RTCHALT = false; //Is the RTC allowed to clock up?
//Gyro:
this.highX = 127;
this.lowX = 127;
this.highY = 127;
this.lowY = 127;
//Sound variables:
this.audioHandle = null; //XAudioJS handle
this.numSamplesTotal = 0; //Length of the sound buffers.
this.sampleSize = 0; //Length of the sound buffer for one channel.
this.dutyLookup = [ //Map the duty values given to ones we can work with.
[false, false, false, false, false, false, false, true],
[true, false, false, false, false, false, false, true],
[true, false, false, false, false, true, true, true],
[false, true, true, true, true, true, true, false]
];
this.currentBuffer = []; //The audio buffer we're working on.
this.bufferContainAmount = 0; //Buffer maintenance metric.
this.LSFR15Table = null;
this.LSFR7Table = null;
this.noiseSampleTable = null;
this.initializeAudioStartState();
this.soundMasterEnabled = false; //As its name implies
this.channel3PCM = null; //Channel 3 adjusted sample buffer.
//Vin Shit:
this.VinLeftChannelMasterVolume = 8; //Computed post-mixing volume.
this.VinRightChannelMasterVolume = 8; //Computed post-mixing volume.
//Channel paths enabled:
this.leftChannel1 = false;
this.leftChannel2 = false;
this.leftChannel3 = false;
this.leftChannel4 = false;
this.rightChannel1 = false;
this.rightChannel2 = false;
this.rightChannel3 = false;
this.rightChannel4 = false;
//Channel output level caches:
this.channel1currentSampleLeft = 0;
this.channel1currentSampleRight = 0;
this.channel2currentSampleLeft = 0;
this.channel2currentSampleRight = 0;
this.channel3currentSampleLeft = 0;
this.channel3currentSampleRight = 0;
this.channel4currentSampleLeft = 0;
this.channel4currentSampleRight = 0;
this.channel1currentSampleLeftSecondary = 0;
this.channel1currentSampleRightSecondary = 0;
this.channel2currentSampleLeftSecondary = 0;
this.channel2currentSampleRightSecondary = 0;
this.channel3currentSampleLeftSecondary = 0;
this.channel3currentSampleRightSecondary = 0;
this.channel4currentSampleLeftSecondary = 0;
this.channel4currentSampleRightSecondary = 0;
this.channel1currentSampleLeftTrimary = 0;
this.channel1currentSampleRightTrimary = 0;
this.channel2currentSampleLeftTrimary = 0;
this.channel2currentSampleRightTrimary = 0;
this.mixerOutputCache = 0;
//Pre-multipliers to cache some calculations:
this.initializeTiming();
this.machineOut = 0; //Premultiplier for audio samples per instruction.
//Audio generation counters:
this.audioTicks = 0; //Used to sample the audio system every x CPU instructions.
this.audioIndex = 0; //Used to keep alignment on audio generation.
this.rollover = 0; //Used to keep alignment on the number of samples to output (Realign from counter alias).
//Timing Variables
this.emulatorTicks = 0; //Times for how many instructions to execute before ending the loop.
this.DIVTicks = 56; //DIV Ticks Counter (Invisible lower 8-bit)
this.LCDTicks = 60; //Counter for how many instructions have been executed on a scanline so far.
this.timerTicks = 0; //Counter for the TIMA timer.
this.TIMAEnabled = false; //Is TIMA enabled?
this.TACClocker = 1024; //Timer Max Ticks
this.serialTimer = 0; //Serial IRQ Timer
this.serialShiftTimer = 0; //Serial Transfer Shift Timer
this.serialShiftTimerAllocated = 0; //Serial Transfer Shift Timer Refill
this.IRQEnableDelay = 0; //Are the interrupts on queue to be enabled?
var dateVar = new_Date(); // The line is changed for benchmarking.
this.lastIteration = dateVar.getTime();//The last time we iterated the main loop.
dateVar = new_Date(); // The line is changed for benchmarking.
this.firstIteration = dateVar.getTime();
this.iterations = 0;
this.actualScanLine = 0; //Actual scan line...
this.lastUnrenderedLine = 0; //Last rendered scan line...
this.queuedScanLines = 0;
this.totalLinesPassed = 0;
this.haltPostClocks = 0; //Post-Halt clocking.
//ROM Cartridge Components:
this.cMBC1 = false; //Does the cartridge use MBC1?
this.cMBC2 = false; //Does the cartridge use MBC2?
this.cMBC3 = false; //Does the cartridge use MBC3?
this.cMBC5 = false; //Does the cartridge use MBC5?
this.cMBC7 = false; //Does the cartridge use MBC7?
this.cSRAM = false; //Does the cartridge use save RAM?
this.cMMMO1 = false; //...
this.cRUMBLE = false; //Does the cartridge use the RUMBLE addressing (modified MBC5)?
this.cCamera = false; //Is the cartridge actually a GameBoy Camera?
this.cTAMA5 = false; //Does the cartridge use TAMA5? (Tamagotchi Cartridge)
this.cHuC3 = false; //Does the cartridge use HuC3 (Hudson Soft / modified MBC3)?
this.cHuC1 = false; //Does the cartridge use HuC1 (Hudson Soft / modified MBC1)?
this.cTIMER = false; //Does the cartridge have an RTC?
this.ROMBanks = [ // 1 Bank = 16 KBytes = 256 Kbits
2, 4, 8, 16, 32, 64, 128, 256, 512
];
this.ROMBanks[0x52] = 72;
this.ROMBanks[0x53] = 80;
this.ROMBanks[0x54] = 96;
this.numRAMBanks = 0; //How many RAM banks were actually allocated?
////Graphics Variables
this.currVRAMBank = 0; //Current VRAM bank for GBC.
this.backgroundX = 0; //Register SCX (X-Scroll)
this.backgroundY = 0; //Register SCY (Y-Scroll)
this.gfxWindowDisplay = false; //Is the windows enabled?
this.gfxSpriteShow = false; //Are sprites enabled?
this.gfxSpriteNormalHeight = true; //Are we doing 8x8 or 8x16 sprites?
this.bgEnabled = true; //Is the BG enabled?
this.BGPriorityEnabled = true; //Can we flag the BG for priority over sprites?
this.gfxWindowCHRBankPosition = 0; //The current bank of the character map the window uses.
this.gfxBackgroundCHRBankPosition = 0; //The current bank of the character map the BG uses.
this.gfxBackgroundBankOffset = 0x80; //Fast mapping of the tile numbering/
this.windowY = 0; //Current Y offset of the window.
this.windowX = 0; //Current X offset of the window.
this.drewBlank = 0; //To prevent the repeating of drawing a blank screen.
this.drewFrame = false; //Throttle how many draws we can do to once per iteration.
this.midScanlineOffset = -1; //mid-scanline rendering offset.
this.pixelEnd = 0; //track the x-coord limit for line rendering (mid-scanline usage).
this.currentX = 0; //The x-coord we left off at for mid-scanline rendering.
//BG Tile Pointer Caches:
this.BGCHRBank1 = null;
this.BGCHRBank2 = null;
this.BGCHRCurrentBank = null;
//Tile Data Cache:
this.tileCache = null;
//Palettes:
this.colors = [0xEFFFDE, 0xADD794, 0x529273, 0x183442]; //"Classic" GameBoy palette colors.
this.OBJPalette = null;
this.BGPalette = null;
this.gbcOBJRawPalette = null;
this.gbcBGRawPalette = null;
this.gbOBJPalette = null;
this.gbBGPalette = null;
this.gbcOBJPalette = null;
this.gbcBGPalette = null;
this.gbBGColorizedPalette = null;
this.gbOBJColorizedPalette = null;
this.cachedBGPaletteConversion = null;
this.cachedOBJPaletteConversion = null;
this.updateGBBGPalette = this.updateGBRegularBGPalette;
this.updateGBOBJPalette = this.updateGBRegularOBJPalette;
this.colorizedGBPalettes = false;
this.BGLayerRender = null; //Reference to the BG rendering function.
this.WindowLayerRender = null; //Reference to the window rendering function.
this.SpriteLayerRender = null; //Reference to the OAM rendering function.
this.frameBuffer = []; //The internal frame-buffer.
this.swizzledFrame = null; //The secondary gfx buffer that holds the converted RGBA values.
this.canvasBuffer = null; //imageData handle
this.pixelStart = 0; //Temp variable for holding the current working framebuffer offset.
//Variables used for scaling in JS:
this.onscreenWidth = this.offscreenWidth = 160;
this.onscreenHeight = this.offScreenheight = 144;
this.offscreenRGBCount = this.onscreenWidth * this.onscreenHeight * 4;
//Initialize the white noise cache tables ahead of time:
this.intializeWhiteNoise();
}
// Start of code changed for benchmarking (removed ROM):
GameBoyCore.prototype.GBBOOTROM = [];
GameBoyCore.prototype.GBCBOOTROM = [];
// End of code changed for benchmarking.
GameBoyCore.prototype.ffxxDump = [ //Dump of the post-BOOT I/O register state (From gambatte):
0x0F, 0x00, 0x7C, 0xFF, 0x00, 0x00, 0x00, 0xF8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01,
0x80, 0xBF, 0xF3, 0xFF, 0xBF, 0xFF, 0x3F, 0x00, 0xFF, 0xBF, 0x7F, 0xFF, 0x9F, 0xFF, 0xBF, 0xFF,
0xFF, 0x00, 0x00, 0xBF, 0x77, 0xF3, 0xF1, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
0x91, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x7E, 0xFF, 0xFE,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x3E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC0, 0xFF, 0xC1, 0x00, 0xFE, 0xFF, 0xFF, 0xFF,
0xF8, 0xFF, 0x00, 0x00, 0x00, 0x8F, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xCE, 0xED, 0x66, 0x66, 0xCC, 0x0D, 0x00, 0x0B, 0x03, 0x73, 0x00, 0x83, 0x00, 0x0C, 0x00, 0x0D,
0x00, 0x08, 0x11, 0x1F, 0x88, 0x89, 0x00, 0x0E, 0xDC, 0xCC, 0x6E, 0xE6, 0xDD, 0xDD, 0xD9, 0x99,
0xBB, 0xBB, 0x67, 0x63, 0x6E, 0x0E, 0xEC, 0xCC, 0xDD, 0xDC, 0x99, 0x9F, 0xBB, 0xB9, 0x33, 0x3E,
0x45, 0xEC, 0x52, 0xFA, 0x08, 0xB7, 0x07, 0x5D, 0x01, 0xFD, 0xC0, 0xFF, 0x08, 0xFC, 0x00, 0xE5,
0x0B, 0xF8, 0xC2, 0xCE, 0xF4, 0xF9, 0x0F, 0x7F, 0x45, 0x6D, 0x3D, 0xFE, 0x46, 0x97, 0x33, 0x5E,
0x08, 0xEF, 0xF1, 0xFF, 0x86, 0x83, 0x24, 0x74, 0x12, 0xFC, 0x00, 0x9F, 0xB4, 0xB7, 0x06, 0xD5,
0xD0, 0x7A, 0x00, 0x9E, 0x04, 0x5F, 0x41, 0x2F, 0x1D, 0x77, 0x36, 0x75, 0x81, 0xAA, 0x70, 0x3A,
0x98, 0xD1, 0x71, 0x02, 0x4D, 0x01, 0xC1, 0xFF, 0x0D, 0x00, 0xD3, 0x05, 0xF9, 0x00, 0x0B, 0x00
];
GameBoyCore.prototype.OPCODE = [
//NOP
//#0x00:
function (parentObj) {
//Do Nothing...
},
//LD BC, nn
//#0x01:
function (parentObj) {
parentObj.registerC = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.registerB = parentObj.memoryRead((parentObj.programCounter + 1) & 0xFFFF);
parentObj.programCounter = (parentObj.programCounter + 2) & 0xFFFF;
},
//LD (BC), A
//#0x02:
function (parentObj) {
parentObj.memoryWrite((parentObj.registerB << 8) | parentObj.registerC, parentObj.registerA);
},
//INC BC
//#0x03:
function (parentObj) {
var temp_var = ((parentObj.registerB << 8) | parentObj.registerC) + 1;
parentObj.registerB = (temp_var >> 8) & 0xFF;
parentObj.registerC = temp_var & 0xFF;
},
//INC B
//#0x04:
function (parentObj) {
parentObj.registerB = (parentObj.registerB + 1) & 0xFF;
parentObj.FZero = (parentObj.registerB == 0);
parentObj.FHalfCarry = ((parentObj.registerB & 0xF) == 0);
parentObj.FSubtract = false;
},
//DEC B
//#0x05:
function (parentObj) {
parentObj.registerB = (parentObj.registerB - 1) & 0xFF;
parentObj.FZero = (parentObj.registerB == 0);
parentObj.FHalfCarry = ((parentObj.registerB & 0xF) == 0xF);
parentObj.FSubtract = true;
},
//LD B, n
//#0x06:
function (parentObj) {
parentObj.registerB = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//RLCA
//#0x07:
function (parentObj) {
parentObj.FCarry = (parentObj.registerA > 0x7F);
parentObj.registerA = ((parentObj.registerA << 1) & 0xFF) | (parentObj.registerA >> 7);
parentObj.FZero = parentObj.FSubtract = parentObj.FHalfCarry = false;
},
//LD (nn), SP
//#0x08:
function (parentObj) {
var temp_var = (parentObj.memoryRead((parentObj.programCounter + 1) & 0xFFFF) << 8) | parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 2) & 0xFFFF;
parentObj.memoryWrite(temp_var, parentObj.stackPointer & 0xFF);
parentObj.memoryWrite((temp_var + 1) & 0xFFFF, parentObj.stackPointer >> 8);
},
//ADD HL, BC
//#0x09:
function (parentObj) {
var dirtySum = parentObj.registersHL + ((parentObj.registerB << 8) | parentObj.registerC);
parentObj.FHalfCarry = ((parentObj.registersHL & 0xFFF) > (dirtySum & 0xFFF));
parentObj.FCarry = (dirtySum > 0xFFFF);
parentObj.registersHL = dirtySum & 0xFFFF;
parentObj.FSubtract = false;
},
//LD A, (BC)
//#0x0A:
function (parentObj) {
parentObj.registerA = parentObj.memoryRead((parentObj.registerB << 8) | parentObj.registerC);
},
//DEC BC
//#0x0B:
function (parentObj) {
var temp_var = (((parentObj.registerB << 8) | parentObj.registerC) - 1) & 0xFFFF;
parentObj.registerB = temp_var >> 8;
parentObj.registerC = temp_var & 0xFF;
},
//INC C
//#0x0C:
function (parentObj) {
parentObj.registerC = (parentObj.registerC + 1) & 0xFF;
parentObj.FZero = (parentObj.registerC == 0);
parentObj.FHalfCarry = ((parentObj.registerC & 0xF) == 0);
parentObj.FSubtract = false;
},
//DEC C
//#0x0D:
function (parentObj) {
parentObj.registerC = (parentObj.registerC - 1) & 0xFF;
parentObj.FZero = (parentObj.registerC == 0);
parentObj.FHalfCarry = ((parentObj.registerC & 0xF) == 0xF);
parentObj.FSubtract = true;
},
//LD C, n
//#0x0E:
function (parentObj) {
parentObj.registerC = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//RRCA
//#0x0F:
function (parentObj) {
parentObj.registerA = (parentObj.registerA >> 1) | ((parentObj.registerA & 1) << 7);
parentObj.FCarry = (parentObj.registerA > 0x7F);
parentObj.FZero = parentObj.FSubtract = parentObj.FHalfCarry = false;
},
//STOP
//#0x10:
function (parentObj) {
if (parentObj.cGBC) {
if ((parentObj.memory[0xFF4D] & 0x01) == 0x01) { //Speed change requested.
if (parentObj.memory[0xFF4D] > 0x7F) { //Go back to single speed mode.
cout("Going into single clock speed mode.", 0);
parentObj.doubleSpeedShifter = 0;
parentObj.memory[0xFF4D] &= 0x7F; //Clear the double speed mode flag.
}
else { //Go to double speed mode.
cout("Going into double clock speed mode.", 0);
parentObj.doubleSpeedShifter = 1;
parentObj.memory[0xFF4D] |= 0x80; //Set the double speed mode flag.
}
parentObj.memory[0xFF4D] &= 0xFE; //Reset the request bit.
}
else {
parentObj.handleSTOP();
}
}
else {
parentObj.handleSTOP();
}
},
//LD DE, nn
//#0x11:
function (parentObj) {
parentObj.registerE = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.registerD = parentObj.memoryRead((parentObj.programCounter + 1) & 0xFFFF);
parentObj.programCounter = (parentObj.programCounter + 2) & 0xFFFF;
},
//LD (DE), A
//#0x12:
function (parentObj) {
parentObj.memoryWrite((parentObj.registerD << 8) | parentObj.registerE, parentObj.registerA);
},
//INC DE
//#0x13:
function (parentObj) {
var temp_var = ((parentObj.registerD << 8) | parentObj.registerE) + 1;
parentObj.registerD = (temp_var >> 8) & 0xFF;
parentObj.registerE = temp_var & 0xFF;
},
//INC D
//#0x14:
function (parentObj) {
parentObj.registerD = (parentObj.registerD + 1) & 0xFF;
parentObj.FZero = (parentObj.registerD == 0);
parentObj.FHalfCarry = ((parentObj.registerD & 0xF) == 0);
parentObj.FSubtract = false;
},
//DEC D
//#0x15:
function (parentObj) {
parentObj.registerD = (parentObj.registerD - 1) & 0xFF;
parentObj.FZero = (parentObj.registerD == 0);
parentObj.FHalfCarry = ((parentObj.registerD & 0xF) == 0xF);
parentObj.FSubtract = true;
},
//LD D, n
//#0x16:
function (parentObj) {
parentObj.registerD = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//RLA
//#0x17:
function (parentObj) {
var carry_flag = (parentObj.FCarry) ? 1 : 0;
parentObj.FCarry = (parentObj.registerA > 0x7F);
parentObj.registerA = ((parentObj.registerA << 1) & 0xFF) | carry_flag;
parentObj.FZero = parentObj.FSubtract = parentObj.FHalfCarry = false;
},
//JR n
//#0x18:
function (parentObj) {
parentObj.programCounter = (parentObj.programCounter + ((parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter) << 24) >> 24) + 1) & 0xFFFF;
},
//ADD HL, DE
//#0x19:
function (parentObj) {
var dirtySum = parentObj.registersHL + ((parentObj.registerD << 8) | parentObj.registerE);
parentObj.FHalfCarry = ((parentObj.registersHL & 0xFFF) > (dirtySum & 0xFFF));
parentObj.FCarry = (dirtySum > 0xFFFF);
parentObj.registersHL = dirtySum & 0xFFFF;
parentObj.FSubtract = false;
},
//LD A, (DE)
//#0x1A:
function (parentObj) {
parentObj.registerA = parentObj.memoryRead((parentObj.registerD << 8) | parentObj.registerE);
},
//DEC DE
//#0x1B:
function (parentObj) {
var temp_var = (((parentObj.registerD << 8) | parentObj.registerE) - 1) & 0xFFFF;
parentObj.registerD = temp_var >> 8;
parentObj.registerE = temp_var & 0xFF;
},
//INC E
//#0x1C:
function (parentObj) {
parentObj.registerE = (parentObj.registerE + 1) & 0xFF;
parentObj.FZero = (parentObj.registerE == 0);
parentObj.FHalfCarry = ((parentObj.registerE & 0xF) == 0);
parentObj.FSubtract = false;
},
//DEC E
//#0x1D:
function (parentObj) {
parentObj.registerE = (parentObj.registerE - 1) & 0xFF;
parentObj.FZero = (parentObj.registerE == 0);
parentObj.FHalfCarry = ((parentObj.registerE & 0xF) == 0xF);
parentObj.FSubtract = true;
},
//LD E, n
//#0x1E:
function (parentObj) {
parentObj.registerE = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//RRA
//#0x1F:
function (parentObj) {
var carry_flag = (parentObj.FCarry) ? 0x80 : 0;
parentObj.FCarry = ((parentObj.registerA & 1) == 1);
parentObj.registerA = (parentObj.registerA >> 1) | carry_flag;
parentObj.FZero = parentObj.FSubtract = parentObj.FHalfCarry = false;
},
//JR NZ, n
//#0x20:
function (parentObj) {
if (!parentObj.FZero) {
parentObj.programCounter = (parentObj.programCounter + ((parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter) << 24) >> 24) + 1) & 0xFFFF;
parentObj.CPUTicks += 4;
}
else {
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
}
},
//LD HL, nn
//#0x21:
function (parentObj) {
parentObj.registersHL = (parentObj.memoryRead((parentObj.programCounter + 1) & 0xFFFF) << 8) | parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 2) & 0xFFFF;
},
//LDI (HL), A
//#0x22:
function (parentObj) {
parentObj.memoryWriter[parentObj.registersHL](parentObj, parentObj.registersHL, parentObj.registerA);
parentObj.registersHL = (parentObj.registersHL + 1) & 0xFFFF;
},
//INC HL
//#0x23:
function (parentObj) {
parentObj.registersHL = (parentObj.registersHL + 1) & 0xFFFF;
},
//INC H
//#0x24:
function (parentObj) {
var H = ((parentObj.registersHL >> 8) + 1) & 0xFF;
parentObj.FZero = (H == 0);
parentObj.FHalfCarry = ((H & 0xF) == 0);
parentObj.FSubtract = false;
parentObj.registersHL = (H << 8) | (parentObj.registersHL & 0xFF);
},
//DEC H
//#0x25:
function (parentObj) {
var H = ((parentObj.registersHL >> 8) - 1) & 0xFF;
parentObj.FZero = (H == 0);
parentObj.FHalfCarry = ((H & 0xF) == 0xF);
parentObj.FSubtract = true;
parentObj.registersHL = (H << 8) | (parentObj.registersHL & 0xFF);
},
//LD H, n
//#0x26:
function (parentObj) {
parentObj.registersHL = (parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter) << 8) | (parentObj.registersHL & 0xFF);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//DAA
//#0x27:
function (parentObj) {
if (!parentObj.FSubtract) {
if (parentObj.FCarry || parentObj.registerA > 0x99) {
parentObj.registerA = (parentObj.registerA + 0x60) & 0xFF;
parentObj.FCarry = true;
}
if (parentObj.FHalfCarry || (parentObj.registerA & 0xF) > 0x9) {
parentObj.registerA = (parentObj.registerA + 0x06) & 0xFF;
parentObj.FHalfCarry = false;
}
}
else if (parentObj.FCarry && parentObj.FHalfCarry) {
parentObj.registerA = (parentObj.registerA + 0x9A) & 0xFF;
parentObj.FHalfCarry = false;
}
else if (parentObj.FCarry) {
parentObj.registerA = (parentObj.registerA + 0xA0) & 0xFF;
}
else if (parentObj.FHalfCarry) {
parentObj.registerA = (parentObj.registerA + 0xFA) & 0xFF;
parentObj.FHalfCarry = false;
}
parentObj.FZero = (parentObj.registerA == 0);
},
//JR Z, n
//#0x28:
function (parentObj) {
if (parentObj.FZero) {
parentObj.programCounter = (parentObj.programCounter + ((parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter) << 24) >> 24) + 1) & 0xFFFF;
parentObj.CPUTicks += 4;
}
else {
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
}
},
//ADD HL, HL
//#0x29:
function (parentObj) {
parentObj.FHalfCarry = ((parentObj.registersHL & 0xFFF) > 0x7FF);
parentObj.FCarry = (parentObj.registersHL > 0x7FFF);
parentObj.registersHL = (parentObj.registersHL << 1) & 0xFFFF;
parentObj.FSubtract = false;
},
//LDI A, (HL)
//#0x2A:
function (parentObj) {
parentObj.registerA = parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL);
parentObj.registersHL = (parentObj.registersHL + 1) & 0xFFFF;
},
//DEC HL
//#0x2B:
function (parentObj) {
parentObj.registersHL = (parentObj.registersHL - 1) & 0xFFFF;
},
//INC L
//#0x2C:
function (parentObj) {
var L = (parentObj.registersHL + 1) & 0xFF;
parentObj.FZero = (L == 0);
parentObj.FHalfCarry = ((L & 0xF) == 0);
parentObj.FSubtract = false;
parentObj.registersHL = (parentObj.registersHL & 0xFF00) | L;
},
//DEC L
//#0x2D:
function (parentObj) {
var L = (parentObj.registersHL - 1) & 0xFF;
parentObj.FZero = (L == 0);
parentObj.FHalfCarry = ((L & 0xF) == 0xF);
parentObj.FSubtract = true;
parentObj.registersHL = (parentObj.registersHL & 0xFF00) | L;
},
//LD L, n
//#0x2E:
function (parentObj) {
parentObj.registersHL = (parentObj.registersHL & 0xFF00) | parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//CPL
//#0x2F:
function (parentObj) {
parentObj.registerA ^= 0xFF;
parentObj.FSubtract = parentObj.FHalfCarry = true;
},
//JR NC, n
//#0x30:
function (parentObj) {
if (!parentObj.FCarry) {
parentObj.programCounter = (parentObj.programCounter + ((parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter) << 24) >> 24) + 1) & 0xFFFF;
parentObj.CPUTicks += 4;
}
else {
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
}
},
//LD SP, nn
//#0x31:
function (parentObj) {
parentObj.stackPointer = (parentObj.memoryRead((parentObj.programCounter + 1) & 0xFFFF) << 8) | parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 2) & 0xFFFF;
},
//LDD (HL), A
//#0x32:
function (parentObj) {
parentObj.memoryWriter[parentObj.registersHL](parentObj, parentObj.registersHL, parentObj.registerA);
parentObj.registersHL = (parentObj.registersHL - 1) & 0xFFFF;
},
//INC SP
//#0x33:
function (parentObj) {
parentObj.stackPointer = (parentObj.stackPointer + 1) & 0xFFFF;
},
//INC (HL)
//#0x34:
function (parentObj) {
var temp_var = (parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL) + 1) & 0xFF;
parentObj.FZero = (temp_var == 0);
parentObj.FHalfCarry = ((temp_var & 0xF) == 0);
parentObj.FSubtract = false;
parentObj.memoryWriter[parentObj.registersHL](parentObj, parentObj.registersHL, temp_var);
},
//DEC (HL)
//#0x35:
function (parentObj) {
var temp_var = (parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL) - 1) & 0xFF;
parentObj.FZero = (temp_var == 0);
parentObj.FHalfCarry = ((temp_var & 0xF) == 0xF);
parentObj.FSubtract = true;
parentObj.memoryWriter[parentObj.registersHL](parentObj, parentObj.registersHL, temp_var);
},
//LD (HL), n
//#0x36:
function (parentObj) {
parentObj.memoryWriter[parentObj.registersHL](parentObj, parentObj.registersHL, parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter));
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//SCF
//#0x37:
function (parentObj) {
parentObj.FCarry = true;
parentObj.FSubtract = parentObj.FHalfCarry = false;
},
//JR C, n
//#0x38:
function (parentObj) {
if (parentObj.FCarry) {
parentObj.programCounter = (parentObj.programCounter + ((parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter) << 24) >> 24) + 1) & 0xFFFF;
parentObj.CPUTicks += 4;
}
else {
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
}
},
//ADD HL, SP
//#0x39:
function (parentObj) {
var dirtySum = parentObj.registersHL + parentObj.stackPointer;
parentObj.FHalfCarry = ((parentObj.registersHL & 0xFFF) > (dirtySum & 0xFFF));
parentObj.FCarry = (dirtySum > 0xFFFF);
parentObj.registersHL = dirtySum & 0xFFFF;
parentObj.FSubtract = false;
},
//LDD A, (HL)
//#0x3A:
function (parentObj) {
parentObj.registerA = parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL);
parentObj.registersHL = (parentObj.registersHL - 1) & 0xFFFF;
},
//DEC SP
//#0x3B:
function (parentObj) {
parentObj.stackPointer = (parentObj.stackPointer - 1) & 0xFFFF;
},
//INC A
//#0x3C:
function (parentObj) {
parentObj.registerA = (parentObj.registerA + 1) & 0xFF;
parentObj.FZero = (parentObj.registerA == 0);
parentObj.FHalfCarry = ((parentObj.registerA & 0xF) == 0);
parentObj.FSubtract = false;
},
//DEC A
//#0x3D:
function (parentObj) {
parentObj.registerA = (parentObj.registerA - 1) & 0xFF;
parentObj.FZero = (parentObj.registerA == 0);
parentObj.FHalfCarry = ((parentObj.registerA & 0xF) == 0xF);
parentObj.FSubtract = true;
},
//LD A, n
//#0x3E:
function (parentObj) {
parentObj.registerA = parentObj.memoryReader[parentObj.programCounter](parentObj, parentObj.programCounter);
parentObj.programCounter = (parentObj.programCounter + 1) & 0xFFFF;
},
//CCF
//#0x3F:
function (parentObj) {
parentObj.FCarry = !parentObj.FCarry;
parentObj.FSubtract = parentObj.FHalfCarry = false;
},
//LD B, B
//#0x40:
function (parentObj) {
//Do nothing...
},
//LD B, C
//#0x41:
function (parentObj) {
parentObj.registerB = parentObj.registerC;
},
//LD B, D
//#0x42:
function (parentObj) {
parentObj.registerB = parentObj.registerD;
},
//LD B, E
//#0x43:
function (parentObj) {
parentObj.registerB = parentObj.registerE;
},
//LD B, H
//#0x44:
function (parentObj) {
parentObj.registerB = parentObj.registersHL >> 8;
},
//LD B, L
//#0x45:
function (parentObj) {
parentObj.registerB = parentObj.registersHL & 0xFF;
},
//LD B, (HL)
//#0x46:
function (parentObj) {
parentObj.registerB = parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL);
},
//LD B, A
//#0x47:
function (parentObj) {
parentObj.registerB = parentObj.registerA;
},
//LD C, B
//#0x48:
function (parentObj) {
parentObj.registerC = parentObj.registerB;
},
//LD C, C
//#0x49:
function (parentObj) {
//Do nothing...
},
//LD C, D
//#0x4A:
function (parentObj) {
parentObj.registerC = parentObj.registerD;
},
//LD C, E
//#0x4B:
function (parentObj) {
parentObj.registerC = parentObj.registerE;
},
//LD C, H
//#0x4C:
function (parentObj) {
parentObj.registerC = parentObj.registersHL >> 8;
},
//LD C, L
//#0x4D:
function (parentObj) {
parentObj.registerC = parentObj.registersHL & 0xFF;
},
//LD C, (HL)
//#0x4E:
function (parentObj) {
parentObj.registerC = parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL);
},
//LD C, A
//#0x4F:
function (parentObj) {
parentObj.registerC = parentObj.registerA;
},
//LD D, B
//#0x50:
function (parentObj) {
parentObj.registerD = parentObj.registerB;
},
//LD D, C
//#0x51:
function (parentObj) {
parentObj.registerD = parentObj.registerC;
},
//LD D, D
//#0x52:
function (parentObj) {
//Do nothing...
},
//LD D, E
//#0x53:
function (parentObj) {
parentObj.registerD = parentObj.registerE;
},
//LD D, H
//#0x54:
function (parentObj) {
parentObj.registerD = parentObj.registersHL >> 8;
},
//LD D, L
//#0x55:
function (parentObj) {
parentObj.registerD = parentObj.registersHL & 0xFF;
},
//LD D, (HL)
//#0x56:
function (parentObj) {
parentObj.registerD = parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL);
},
//LD D, A
//#0x57:
function (parentObj) {
parentObj.registerD = parentObj.registerA;
},
//LD E, B
//#0x58:
function (parentObj) {
parentObj.registerE = parentObj.registerB;
},
//LD E, C
//#0x59:
function (parentObj) {
parentObj.registerE = parentObj.registerC;
},
//LD E, D
//#0x5A:
function (parentObj) {
parentObj.registerE = parentObj.registerD;
},
//LD E, E
//#0x5B:
function (parentObj) {
//Do nothing...
},
//LD E, H
//#0x5C:
function (parentObj) {
parentObj.registerE = parentObj.registersHL >> 8;
},
//LD E, L
//#0x5D:
function (parentObj) {
parentObj.registerE = parentObj.registersHL & 0xFF;
},
//LD E, (HL)
//#0x5E:
function (parentObj) {
parentObj.registerE = parentObj.memoryReader[parentObj.registersHL](parentObj, parentObj.registersHL);
},
//LD E, A
//#0x5F:
function (parentObj) {
parentObj.registerE = parentObj.registerA;
},
//LD H, B
//#0x60:
function (parentObj) {
parentObj.registersHL = (parentObj.registerB << 8) | (parentObj.registersHL & 0xFF);
},
//LD H, C
//#0x61:
function (parentObj) {
parentObj.registersHL = (parentObj.registerC << 8) | (parentObj.registersHL & 0xFF);
},
//LD H, D
//#0x62:
function (parentObj) {
parentObj.registersHL = (parentObj.registerD << 8) | (parentObj.registersHL & 0xFF);
},
//LD H, E
//#0x63:
function (parentObj) {
parentObj.registersHL = (parentObj.registerE << 8) | (parentObj.registersHL & 0xFF);
},
//LD H, H
//#0x64:
function (parentObj) {
//Do nothing...
},
//LD H, L
//#0x65:
function (parentObj) {
parentObj.registersHL = (parentObj.registersHL & 0xFF) * 0x101;
},