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Copy pathCPU.java
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5070 lines (4312 loc) · 132 KB
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Copy pathCPU.java
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5070 lines (4312 loc) · 132 KB
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import java.io.*;
import java.util.*;
public final class CPU extends Thread
{
//boolean[] visited = new boolean[0x10000];
public static final int BIT7 = 1<<7;
public static final int BIT6 = 1<<6;
public static final int BIT5 = 1<<5;
public static final int BIT4 = 1<<4;
public static final int BIT3 = 1<<3;
public static final int BIT2 = 1<<2;
public static final int BIT1 = 1<<1;
public static final int BIT0 = 1<<0;
private static final int ZERO = BIT7;
private static final int SUBTRACT = BIT6;
private static final int HALF_CARRY = BIT5;
private static final int CARRY = BIT4;
private static final int CYCLES_PER_LINE = 114; // (1048576 Hz/ 9198 Hz)
private static final long nsPerFrame = (long)(1000000000/59.73);
private static final int[] color = {0xFFFFFFFF, 0xFFC0C0C0, 0xFF404040, 0xFF000000}; // WHITE, LIGHT_GRAY, DARK_GRAY, BLACK
private static byte val;
private static ROM rom;
private static GUI gui;
private static Sound snd;
private static int mbc;
private static int mbcMode = 0;
private static int mbcSig = 0;
private static int mbcLower = 1;
private static int ROMBank = 0;
private static int RAMBank = 0;
private static boolean pleaseWait;
private static boolean halt;
private static boolean saveState;
private static boolean loadState;
private static int newSerialInt;
private static boolean joypadFlag;
private static boolean throttle = true;
private static final int[] colorBG = new int[4];
private static final int[] colorSP0 = new int[4];
private static final int[] colorSP1 = new int[4];
private static final int[] dirtyTiles1 = new int[16];
private static final int[] dirtyTiles2 = new int[16];
public CPU(String fileName, GUI guiPointer)
{
// Reset static variables
rom = new ROM(fileName);
mbc = rom.getCartType(false);
System.out.println("mbc num: " + mbc);
gui = guiPointer;
pleaseWait = false; // Not in a waiting state on first run
halt = false;
loadState = false;
saveState = false;
}
public void setSaveState(boolean flag) {
saveState = flag;
}
public void setLoadState(boolean flag) {
loadState = flag;
}
public String toString()
{
return rom.getTitle();
}
public void setSound(Sound snd)
{
this.snd = snd;
}
public boolean getHalt()
{
return halt;
}
public void setHalt(boolean flag) {
halt = flag;
}
public boolean getWaiting()
{
return pleaseWait;
}
public void setWaiting(boolean flag)
{
pleaseWait = flag;
}
public void setThrottle(boolean flag)
{
throttle = flag;
}
public void joypadInt()
{
//System.out.println("joypad interrupt requested");
joypadFlag = true;
}
private static final void genFlagTable(final int[] FLAG_ADD, final int[] FLAG_SUB, final int[] FLAG_INC, final int[] FLAG_DEC)
{
int result, flag;
for (int a = 0; a <= 256; a++)
for (int b = 0; b <= 255; b++)
{
result = b+a;
flag = 0;
if ((b & 0x0F) + (a & 0x0F) > 0x0F) // carry from bit[3]
flag |= HALF_CARRY;
if (result > 0xFF)
{
result &= 0xFF;
flag |= CARRY;
}
if (result == 0)
flag |= ZERO;
FLAG_ADD[(a << 8) | b] = flag;
result = b-a;
flag = SUBTRACT;
if ((b & 0x0F) < (a & 0x0F)) // borrow from bit[4]
flag |= HALF_CARRY;
if (result < 0)
{
result &= 0xFF;
flag |= CARRY;
}
if (result == 0)
flag |= ZERO;
FLAG_SUB[(a << 8) | b] = flag;
}
for (int a = 0; a <= 255; a++)
{
flag = 0;
if ((a & 0x0F) == 0x0F)
flag |= HALF_CARRY;
if (a == 255)
flag |= ZERO;
FLAG_INC[a] = flag;
flag = SUBTRACT;
if ((a & 0x0F) == 0)
flag |= HALF_CARRY;
if (a == 1)
flag |= ZERO;
FLAG_DEC[a] = flag;
}
}
private static final int readMem(final int[][] mem, final int index)
{
return mem[index >> 13][index & 0x1FFF];
}
private static final int writeMem(final int[][] mem, final int index, final int val)
{
switch (index >> 8)
{
case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05: case 0x06: case 0x07:
case 0x08: case 0x09: case 0x0A: case 0x0B: case 0x0C: case 0x0D: case 0x0E: case 0x0F:
case 0x10: case 0x11: case 0x12: case 0x13: case 0x14: case 0x15: case 0x16: case 0x17:
case 0x18: case 0x19: case 0x1A: case 0x1B: case 0x1C: case 0x1D: case 0x1E: case 0x1F:
return mem[0][index & 0x1FFF];
case 0x20: case 0x21: case 0x22: case 0x23: case 0x24: case 0x25: case 0x26: case 0x27:
case 0x28: case 0x29: case 0x2A: case 0x2B: case 0x2C: case 0x2D: case 0x2E: case 0x2F:
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: case 0x35: case 0x36: case 0x37:
case 0x38: case 0x39: case 0x3A: case 0x3B: case 0x3C: case 0x3D: case 0x3E: case 0x3F:
switch(mbc)
{
case 0: break;
case 1:
int prev = mbcLower;
mbcLower = (val & 0x1F);
if (mbcLower == 0)
mbcLower = 1;
if ((mbcSig | mbcLower) < rom.numROMBanks)
{
ROMBank = (mbcSig | mbcLower);
mem[2] = rom.getROM(ROMBank, 0);
mem[3] = rom.getROM(ROMBank, 1);
}
else
mbcLower = prev;
break;
case 2:
if ((index & 0x0100) == 0)
break;
prev = ROMBank;
ROMBank = (val & 0x0F);
if (ROMBank == 0)
ROMBank = 1;
if (ROMBank < rom.numROMBanks)
{
mem[2] = rom.getROM(ROMBank, 0);
mem[3] = rom.getROM(ROMBank, 1);
}
else
ROMBank = prev;
break;
case 3:
prev = ROMBank;
ROMBank = (val & 0x7F);
if (ROMBank == 0)
ROMBank = 1;
if (ROMBank < rom.numROMBanks)
{
mem[2] = rom.getROM(ROMBank, 0);
mem[3] = rom.getROM(ROMBank, 1);
}
else
ROMBank = prev;
break;
case 5:
//...
break;
default:
throw new AssertionError("Invalid MBC Type");
}
return mem[1][index & 0x1FFF];
case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47:
case 0x48: case 0x49: case 0x4A: case 0x4B: case 0x4C: case 0x4D: case 0x4E: case 0x4F:
case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57:
case 0x58: case 0x59: case 0x5A: case 0x5B: case 0x5C: case 0x5D: case 0x5E: case 0x5F:
switch(mbc)
{
case 0: break;
case 1:
if (mbcMode == 0)
{
int prev = mbcSig;
mbcSig = (val & 0x03) << 5;
if ((mbcSig | mbcLower) < rom.numROMBanks)
{
ROMBank = (mbcSig | mbcLower);
mem[2] = rom.getROM(ROMBank, 0);
mem[3] = rom.getROM(ROMBank, 1);
}
else
mbcSig = prev;
}
else
{
if ((val & 0x03) < rom.getRAMSize(false))
{
RAMBank = val & 0x03;
mem[5] = rom.getRAM(RAMBank);
}
}
break;
case 2: break;
case 3:
if ((val & 0x03) < rom.getRAMSize(false))
{
RAMBank = val & 0x03;
mem[5] = rom.getRAM(RAMBank);
}
break;
case 5:
//...
break;
default:
throw new AssertionError("Invalid MBC Type");
}
return mem[2][index & 0x1FFF];
case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x65: case 0x66: case 0x67:
case 0x68: case 0x69: case 0x6A: case 0x6B: case 0x6C: case 0x6D: case 0x6E: case 0x6F:
case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x75: case 0x76: case 0x77:
case 0x78: case 0x79: case 0x7A: case 0x7B: case 0x7C: case 0x7D: case 0x7E: case 0x7F:
switch(mbc)
{
case 0: break;
case 1:
mbcMode = val & 0x01;
if (mbcMode == 0)
{
RAMBank = 0;
mem[5] = rom.getRAM(0);
}
else
{
mbcSig = 0;
ROMBank = mbcLower;
mem[2] = rom.getROM(ROMBank, 0);
mem[3] = rom.getROM(ROMBank, 1);
}
break;
case 2: case 3: break;
case 5:
//...
break;
default:
throw new AssertionError("Invalid MBC Type");
}
return mem[3][index & 0x1FFF];
case 0x80:
dirtyTiles1[0] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x81:
dirtyTiles1[1] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x82:
dirtyTiles1[2] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x83:
dirtyTiles1[3] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x84:
dirtyTiles1[4] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x85:
dirtyTiles1[5] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x86:
dirtyTiles1[6] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x87:
dirtyTiles1[7] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x88:
dirtyTiles1[8] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[0] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x89:
dirtyTiles1[9] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[1] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x8A:
dirtyTiles1[10] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[2] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x8B:
dirtyTiles1[11] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[3] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x8C:
dirtyTiles1[12] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[4] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x8D:
dirtyTiles1[13] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[5] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x8E:
dirtyTiles1[14] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[6] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x8F:
dirtyTiles1[15] |= 1 << ((index & 0x00F0) >> 4);
dirtyTiles2[7] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x90:
dirtyTiles2[8] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x91:
dirtyTiles2[9] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x92:
dirtyTiles2[10] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x93:
dirtyTiles2[11] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x94:
dirtyTiles2[12] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x95:
dirtyTiles2[13] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x96:
dirtyTiles2[14] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x97:
dirtyTiles2[15] |= 1 << ((index & 0x00F0) >> 4);
return (mem[4][index & 0x1FFF] = val);
case 0x98: case 0x99: case 0x9A: case 0x9B: case 0x9C: case 0x9D: case 0x9E: case 0x9F:
return (mem[4][index & 0x1FFF] = val);
case 0xA0: case 0xA1: case 0xA2: case 0xA3: case 0xA4: case 0xA5: case 0xA6: case 0xA7:
case 0xA8: case 0xA9: case 0xAA: case 0xAB: case 0xAC: case 0xAD: case 0xAE: case 0xAF:
case 0xB0: case 0xB1: case 0xB2: case 0xB3: case 0xB4: case 0xB5: case 0xB6: case 0xB7:
case 0xB8: case 0xB9: case 0xBA: case 0xBB: case 0xBC: case 0xBD: case 0xBE: case 0xBF:
return (mem[5][index & 0x1FFF] = val);
case 0xC0: case 0xC1: case 0xC2: case 0xC3: case 0xC4: case 0xC5: case 0xC6: case 0xC7:
case 0xC8: case 0xC9: case 0xCA: case 0xCB: case 0xCC: case 0xCD: case 0xCE: case 0xCF:
case 0xD0: case 0xD1: case 0xD2: case 0xD3: case 0xD4: case 0xD5: case 0xD6: case 0xD7:
case 0xD8: case 0xD9: case 0xDA: case 0xDB: case 0xDC: case 0xDD: case 0xDE: case 0xDF:
return (mem[6][index & 0x1FFF] = val);
case 0xE0: case 0xE1: case 0xE2: case 0xE3: case 0xE4: case 0xE5: case 0xE6: case 0xE7:
case 0xE8: case 0xE9: case 0xEA: case 0xEB: case 0xEC: case 0xED: case 0xEE: case 0xEF:
case 0xF0: case 0xF1: case 0xF2: case 0xF3: case 0xF4: case 0xF5: case 0xF6: case 0xF7:
case 0xF8: case 0xF9: case 0xFA: case 0xFB: case 0xFC: case 0xFD: case 0xFE:
return (mem[7][index & 0x1FFF] = val);
case 0xFF:
switch(index)
{
// Handle IO ports
case 0xFF00: //Joypad
/*Button controls
7 6 5 4 3 2 1 0
[NA][NA][Sel Btn][Sel Dir][D/St][U/Sel][L/B][R/A]*/
// Check for Joypad presses
// check 5 or 4
{int temp = (val | 0x0F);
if((val & BIT5) == 0)
{
if(gui.getStart())
temp &= ~BIT3;
if(gui.getSelect())
temp &= ~BIT2;
if(gui.getB())
temp &= ~BIT1;
if(gui.getA())
temp &= ~BIT0;
}
else if((val & BIT4) == 0)
{
if(gui.getDown())
temp &= ~BIT3;
if(gui.getUp())
temp &= ~BIT2;
if(gui.getLeft())
temp &= ~BIT1;
if(gui.getRight())
temp &= ~BIT0;
}
return (mem[7][0x1F00] = temp);}
case 0xFF01:
return mem[7][0x1F01];
case 0xFF02:
if ((val & BIT7) != 0 && (val & BIT0) != 0)
newSerialInt = 10;
return (mem[7][0x1F02] = val);
case 0xFF04:
return (mem[7][0x1F04] = val);
case 0xFF05:
return (mem[7][0x1F05] = val);
case 0xFF06:
return (mem[7][0x1F06] = val);
case 0xFF07:
return (mem[7][0x1F07] = val);
case 0xFF0F:
return (mem[7][0x1F0F] = (val & 0x1F));
case 0xFF10:
if(snd.soundEnabled)
snd.channel1.setSweep(((val & 0x70) >> 4), (val & 0x07), ((val & 0x08) != 0));
return(mem[7][0x1F10] = val);
case 0xFF11:
if(snd.soundEnabled)
{
snd.channel1.setDutyCycle((val & 0xC0) >> 6);
snd.channel1.setLength(val & 0x3F);
}
return(mem[7][0x1F11]=val);
case 0xFF12:
if(snd.soundEnabled)
snd.channel1.setEnvelope(((val & 0xF0) >> 4),(val & 0x07),((val & 0x08) != 0));
return(mem[7][0x1F12] = val);
case 0xFF13: // Channel 1 Frequency Lo (W)
if(snd.soundEnabled)
snd.channel1.setFrequency((((mem[7][0x1F14]) & 0x07) << 8) | val);
return (mem[7][0x1F13] = val);
case 0xFF14: // Channel 1 Frequency Hi (R/W)
if(snd.soundEnabled)
{
if((val & 0x80) != 0)
{
snd.channel1.setLength(mem[7][0x1F11] & 0x3F);
snd.channel1.setEnvelope((mem[7][0x1F12] & 0xF0) >> 4, (mem[7][0x1F12] & 0x07), ((mem[7][0x1F12] & 0x08) != 0));
}
if((val & 0x40) == 0)
{
snd.channel1.setLength(-1);
}
snd.channel1.setFrequency(((val & 0x07) << 8) | mem[7][0x1F13]);
}
return (mem[7][0x1F14] = val);
case 0xFF16: // Channel 2 Sound Length/Wave Pattern Duty (W)
if(snd.soundEnabled)
{
snd.channel2.setLength(val & 0x3F);
snd.channel2.setDutyCycle((val & 0xC0) >> 6);
}
return (mem[7][0x1F16] = val);
case 0xFF17: // Channel 2 Volume Envelope (R/W)
if(snd.soundEnabled)
snd.channel2.setEnvelope(
((val & 0xF0 ) >> 4),(val & 0x07),((val & 0x08) != 0));
return (mem[7][0x1F17] = val);
case 0xFF18: // Channel 2 Frequency Lo (W)
if(snd.soundEnabled)
snd.channel2.setFrequency((((mem[7][0x1F19]) & 0x07) << 8) | val);
return (mem[7][0x1F18] = val);
case 0xFF19: // Channel 2 Frequency Hi (R/W)
if(snd.soundEnabled)
{
if((val & 0x80) != 0)
{
snd.channel2.setLength(mem[7][0x1F21] & 0x3F);
snd.channel2.setEnvelope((mem[7][0x1F17] & 0xF0) >> 4, (mem[7][0x1F17] & 0x07), ((mem[7][0x1F17] & 0x08) != 0));
}
if((val & 0x40) == 0)
{
snd.channel2.setLength(-1);
}
snd.channel2.setFrequency(((val & 0x07) << 8) | mem[7][0x1F18]);
}
return (mem[7][0x1F19] = val);
case 0xFF1A:
if(snd.soundEnabled)
{
if((val & 0x80) !=0)
{
snd.channel3.setVolume((mem[7][0x1F1C] & 0x60) >> 5);
}
else
snd.channel3.setVolume(0);
}
return(mem[7][0x1F1A] = val);
case 0xFF1B:
if(snd.soundEnabled)
snd.channel3.setLength(val);
return(mem[7][0x1F1B] = val);
case 0xFF1C:
if(snd.soundEnabled)
snd.channel3.setVolume((val & 0x60) >> 5);
return(mem[7][0x1F1C] = val);
case 0XFF1D:
if(snd.soundEnabled)
snd.channel3.setFrequency(((mem[7][0x1F1E] & 0x07) << 8) | val);
return(mem[7][0x1F1D] = val);
case 0xFF1E:
if(snd.soundEnabled)
{
if((mem[7][0x1F19] & 0x80) !=0)
{
snd.channel3.setLength(mem[7][0x1F1B]);
}
snd.channel3.setFrequency(((val & 0x07) << 8) | mem[7][0x1F1D]);
}
return(mem[7][0x1F1E] = val);
case 0xFF20:
if(snd.soundEnabled)
snd.channel4.setLength(val & 0x3F);
return(mem[7][0x1F20] = val);
case 0xFF21: //Channel 4 Volume Envelope
if(snd.soundEnabled)
snd.channel4.setEnvelope(((val & 0xF0) >> 4),(val & 0x07),((val & 0x08) != 0));
return (mem[7][0x1F21] = val);
case 0xFF22:
if(snd.soundEnabled)
snd.channel4.setParameters((val & 0x07),((val &0x08) != 0),((val & 0xF0) >> 4));
return(mem[7][0x1F22] = val);
case 0xFF23:
if(snd.soundEnabled)
{
if((val & 0x80) != 0)
{
snd.channel4.setLength(mem[7][0x1F20] & 0x3F);
}
if((val & 0x40) == 0)
snd.channel4.setLength(-1);
}
return(mem[7][0x1F23] = val);
case 0xFF25: // Stereo select
if(snd.soundEnabled)
{
int chanData;
chanData = 0;
if((val & 0x01) !=0)
{
chanData |= SquareWaveGenerator.CHAN_LEFT;
}
if((val & 0x10) !=0)
{
chanData |= SquareWaveGenerator.CHAN_RIGHT;
}
snd.channel1.setChannel(chanData);
chanData = 0;
if((val & 0x02) !=0)
{
chanData |= SquareWaveGenerator.CHAN_LEFT;
}
if((val & 0x20) !=0)
{
chanData |= SquareWaveGenerator.CHAN_RIGHT;
}
snd.channel2.setChannel(chanData);
chanData = 0;
if((val & 0x04) !=0)
{
chanData |= SquareWaveGenerator.CHAN_LEFT;
}
if((val & 0x40) !=0)
{
chanData |= SquareWaveGenerator.CHAN_RIGHT;
}
snd.channel3.setChannel(chanData);
}
return(mem[7][0x1F25] = val);
case 0xFF30:
case 0xFF31:
case 0xFF32:
case 0xFF33:
case 0xFF34:
case 0xFF35:
case 0xFF36:
case 0xFF37:
case 0xFF38:
case 0xFF39:
case 0xFF3A:
case 0xFF3B:
case 0xFF3C:
case 0xFF3D:
case 0xFF3E:
case 0xFF3F:
if(snd.soundEnabled)
snd.channel3.setSamplePair(index - 0xFF30, val);
return(mem[7][index & 0x1FFF] = val);
case 0xFF40:
return (mem[7][0x1F40] = val);
case 0xFF41:
return (mem[7][0x1F41] = ((val & 0xF8) | (mem[7][0x1F41] & 0x07)));
case 0xFF42:
return (mem[7][0x1F42] = val);
case 0xFF43:
return (mem[7][0x1F43] = val);
case 0xFF44:
return mem[7][0x1F44]; // read only
case 0xFF45:
return (mem[7][0x1F45] = val);
case 0xFF46:
{int start = val << 8;
for (int i = 0; i < 0xA0; i++)
mem[7][0x1E00 | i] = readMem(mem, start | i);
return (mem[7][0x1F46] = val);}
case 0xFF47:
colorBG[0] = color[val & (BIT1 | BIT0)];
colorBG[1] = color[(val & (BIT3 | BIT2)) >> 2];
colorBG[2] = color[(val & (BIT5 | BIT4)) >> 4];
colorBG[3] = color[val >> 6];
return (mem[7][0x1F47] = val);
case 0xFF48:
colorSP0[1] = color[(val & (BIT3 | BIT2)) >> 2];
colorSP0[2] = color[(val & (BIT5 | BIT4)) >> 4];
colorSP0[3] = color[val >> 6];
return (mem[7][0x1F48] = val);
case 0xFF49:
colorSP1[1] = color[(val & (BIT3 | BIT2)) >> 2];
colorSP1[2] = color[(val & (BIT5 | BIT4)) >> 4];
colorSP1[3] = color[val >> 6];
return (mem[7][0x1F49] = val);
case 0xFF4A:
return (mem[7][0x1F4A] = val);
case 0xFF4B:
return (mem[7][0x1F4B] = val);
case 0xFFFF:
return (mem[7][0x1FFF] = val);
default:
return (mem[7][index & 0x1FFF] = val);
}
default:
throw new AssertionError("Invalid memory address");
}
}
public void run()
{
int PC=0x0100;
int SP=0xFFFE;
int AREG=0x01;
int FREG=0xB0;
int BREG=0x00;
int CREG=0x13;
int DREG=0x00;
int EREG=0xD8;
int HREG=0x01;
int LREG=0x4D;
boolean IME = false;
boolean gameHalt = false;
final int[][] mem = new int[8][0x2000];
mem[0] = rom.getDefaultROM(0);
mem[1] = rom.getDefaultROM(1);
mem[2] = rom.getROM(1, 0);
mem[3] = rom.getROM(1, 1);
mem[4] = new int[0x2000];
mem[5] = rom.getRAM(0); // can be null
if (mem[5] == null)
mem[5] = new int[0x2000];
mem[6] = new int[0x2000];
mem[7] =new int[0x2000];
final int[] FLAG_ADD = new int[257*256]; // max 255 + 1 (carry) = 256;
final int[] FLAG_SUB = new int[257*256];
final int[] FLAG_INC = new int[256];
final int[] FLAG_DEC = new int[256];
final int[] background = new int[256*256];
final int[] screen = new int[GUI.screenWidth * GUI.screenHeight];
final int[] prevTiles = new int[32*32];
final boolean[] spritesOff = new boolean[GUI.screenHeight];
final int[] bgColor0 = new int[GUI.screenHeight];
int windowOffset = 0;
int prevTileMap = -1;
int prevColors = -1;
int val = 0;
int memval = 0;
int index = 0;
int frameCount = 0;
int numCycles = 0;
int scanline = 0;
int nextHBlank = CYCLES_PER_LINE;
int[] myColor = null;
final int[] VRAM = mem[4];
final int[] HRAM = mem[7];
genFlagTable(FLAG_ADD, FLAG_SUB, FLAG_INC, FLAG_DEC);
// Set default values on boot
writeMem(mem, 0xFF05, 0x00); // TIMA
writeMem(mem, 0xFF06, 0x00); // TMA
writeMem(mem, 0xFF07, 0x00); // TAC
writeMem(mem, 0xFF10, 0x80); // NR10
writeMem(mem, 0xFF11, 0xBF); // NR11
writeMem(mem, 0xFF12, 0xF3); // NR12
writeMem(mem, 0xFF14, 0xBF); // NR14
writeMem(mem, 0xFF16, 0x3F); // NR21
writeMem(mem, 0xFF17, 0x00); // NR22
writeMem(mem, 0xFF19, 0xBF); // NR24
writeMem(mem, 0xFF1A, 0x7F); // NR30
writeMem(mem, 0xFF1B, 0xFF); // NR31
writeMem(mem, 0xFF1C, 0x9F); // NR32
writeMem(mem, 0xFF1E, 0xBF); // NR33
writeMem(mem, 0xFF20, 0xFF); // NR41
writeMem(mem, 0xFF21, 0x00); // NR42
writeMem(mem, 0xFF22, 0x00); // NR43
writeMem(mem, 0xFF23, 0xBF); // NR30
writeMem(mem, 0xFF24, 0x77); // NR50
writeMem(mem, 0xFF25, 0xF3); // NR51
writeMem(mem, 0xFF26, 0xF1); // NR52
writeMem(mem, 0xFF40, 0x91); // LCDC
writeMem(mem, 0xFF42, 0x00); // SCY
writeMem(mem, 0xFF43, 0x00); // SCX
writeMem(mem, 0xFF45, 0x00); // LYC
writeMem(mem, 0xFF47, 0xFC); // BGP
writeMem(mem, 0xFF48, 0xFF); // OBP0
writeMem(mem, 0xFF49, 0xFF); // OBP1
writeMem(mem, 0xFF4A, 0x00); // WY
writeMem(mem, 0xFF4B, 0x00); // WX
writeMem(mem, 0xFFFF, 0x00); // IE
long startT = System.nanoTime();
long prevFrame = System.nanoTime();
for(;;) // loop until thread stops
{
// Check if should perform actions
synchronized (this) {
while (pleaseWait) {
try {
wait();
} catch (Exception e) {e.printStackTrace();}
}
if(halt){
return;
}
// Save state... since all variables are local to this function, we will throw all the save state stuff here
if(saveState){
String path = rom.getPath(), filename;
if(path.endsWith(".gb")){
filename = path.substring(0, path.length()-3) + ".sav"; // get rid of ".gb" and add in ".sav"
}
else if(path.endsWith(".gbc")){ // Same for ,gbc
filename = path.substring(0, path.length()-4) + ".sav";
}
else{ // Just tack on .sav if it's some weird filename we don't recognize
filename = path + ".sav";
}
try{
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(filename));
//System.out.printf("%d %d %d %d %d %d %d %d %d %d\n", PC,SP,AREG,BREG,CREG,DREG,EREG,FREG,HREG,LREG);
out.write(PC>>8);
out.write(PC&0xFF);
out.write(SP>>8);
out.write(SP&0xFF);
out.write(AREG);
out.write(BREG);
out.write(CREG);
out.write(DREG);
out.write(EREG);
out.write(FREG);
out.write(HREG);
out.write(LREG);
out.write((IME?1:0));
out.write(ROMBank);
out.write(RAMBank);
ROM.writeInt(out,frameCount);
ROM.writeInt(out,numCycles);
ROM.writeInt(out,scanline);
ROM.writeInt(out,nextHBlank);
for(int i: colorBG){
ROM.writeInt(out,i);
}
for(int i: colorSP0){
ROM.writeInt(out,i);
}
for(int i: colorSP1){
ROM.writeInt(out,i);
}
for(int i: VRAM){
out.write(i);
}
for(int i: HRAM){
out.write(i);
}
for(int i: mem[6]){
out.write(i);
}
int ramsize = rom.getRAMSize(false);
for(int i = 0; i < ramsize; i++){
for(int k: rom.getRAM(i)){
out.write(k);
}
}
out.close();
System.out.println("Save Success");
}
catch(Exception e){
e.printStackTrace();
}
saveState = false;
}
if(loadState){
String path = rom.getPath(), filename;
if(path.endsWith(".gb")){
filename = path.substring(0, path.length()-3) + ".sav"; // get rid of ".gb" and add in ".sav"
}
else if(path.endsWith(".gbc")){ // Same for ,gbc
filename = path.substring(0, path.length()-4) + ".sav";
}
else{ // Just tack on .sav if it's some weird filename we don't recognize
filename = path + ".sav";
}
try{
BufferedInputStream buf = new BufferedInputStream(new FileInputStream(filename));
PC = (buf.read())<<8;
PC |= buf.read();
SP = (buf.read())<<8;
SP |= buf.read();
AREG=buf.read();
BREG=buf.read();
CREG=buf.read();
DREG=buf.read();
EREG=buf.read();
FREG=buf.read();
HREG=buf.read();
LREG=buf.read();
//System.out.printf("%d %d %d %d %d %d %d %d %d\n", PC,SP,AREG,BREG,CREG,DREG,EREG,FREG,HREG,LREG);
IME = (buf.read()==1);
ROMBank = buf.read();
RAMBank = buf.read();
mem[2] = rom.getROM(ROMBank, 0);
mem[3] = rom.getROM(ROMBank, 1);
mem[5] = rom.getRAM(RAMBank);
windowOffset = 0;
prevTileMap = -1;
prevColors = -1;
frameCount = ROM.readInt(buf);
numCycles = ROM.readInt(buf);
scanline = ROM.readInt(buf);
nextHBlank = ROM.readInt(buf);
for(int i=0; i< 4; i++)
colorBG[i]=ROM.readInt(buf);
for(int i=0; i< 4; i++)
colorSP0[i]=ROM.readInt(buf);
for(int i=0; i< 4; i++)
colorSP1[i]=ROM.readInt(buf);
for(int i=0; i< VRAM.length; i++)
VRAM[i]=buf.read();
for(int i=0; i< HRAM.length; i++)
HRAM[i]=buf.read();
for(int i=0; i< mem[6].length; i++)
mem[6][i]=buf.read();
int ramsize = rom.getRAMSize(false);
for(int i = 0; i < ramsize; i++){
int temp[] = rom.getRAM(i);
for(int j = 0; j < temp.length; j++){
temp[j]=buf.read();
}
}
buf.close();
System.out.println("Load Success");
}
catch(Exception e){
e.printStackTrace();
}
loadState = false;
}
}
// Start drawing background
if ((HRAM[0x1F40] & BIT0) != 0)
{
final boolean redraw;
if (prevColors != HRAM[0x1F47] || prevTileMap != (HRAM[0x1F40] & BIT4))
{
prevColors = HRAM[0x1F47];
prevTileMap = (HRAM[0x1F40] & BIT4);
redraw = true;
}
else
redraw = false;
myColor = colorBG;
for (int upperByte = 0; upperByte < 0x10000; upperByte += 0x800)
{
for (int xPix = 0; xPix < 0x100; xPix+=8)
{
int tileNum = VRAM[0x1800 + ((HRAM[0x1F40] & BIT3) << 7) + ((upperByte >> 6) | (xPix >> 3))];
int tileIndex;
if ((HRAM[0x1F40] & BIT4) != 0)
{
if (!redraw && (prevTiles[(upperByte >> 6) | (xPix >> 3)] == tileNum) && ((dirtyTiles1[tileNum >> 4] & (1 << (tileNum & 0x0F))) == 0))
continue;
tileIndex = tileNum << 4; // tileNum * 16
}
else
{
/*if (tileNum >= 128)