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GB: Remove references to gbReadOpcode 

Merged with gbReadMemory since this basically is just a duplicate
This commit is contained in:
retrowertz 2018-07-26 00:24:06 +08:00
parent eb20bb4aad
commit d9e0d0f88d
3 changed files with 84 additions and 203 deletions
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163
src/gb/GB.cpp
View File

@ -1701,144 +1701,6 @@ void gbWriteMemory(register uint16_t address, register uint8_t value)
gbMemory[address] = value; gbMemory[address] = value;
} }
uint8_t gbReadOpcode(register uint16_t address)
{
if (gbCheatMap[address])
return gbCheatRead(address);
if (address < 0x8000)
return gbMemoryMap[address >> 12][address & 0x0fff];
if (address < 0xa000) {
// A lot of 'ugly' checks... But only way to emulate this particular behaviour...
if (
(
(gbHardware & 0xa) && ((gbLcdModeDelayed != 3) || (((register_LY == 0) && (gbScreenOn == false) && (register_LCDC & 0x80)) && (gbLcdLYIncrementTicksDelayed == (GBLY_INCREMENT_CLOCK_TICKS - GBLCD_MODE_2_CLOCK_TICKS)))))
|| ((gbHardware & 0x5) && (gbLcdModeDelayed != 3) && ((gbLcdMode != 3) || ((register_LY == 0) && ((gbScreenOn == false) && (register_LCDC & 0x80)) && (gbLcdLYIncrementTicks == (GBLY_INCREMENT_CLOCK_TICKS - GBLCD_MODE_2_CLOCK_TICKS))))))
return gbMemoryMap[address >> 12][address & 0x0fff];
return 0xff;
}
// Used for the mirroring of 0xC000 in 0xE000
if ((address >= 0xe000) && (address < 0xfe00))
address &= ~0x2000;
switch (address & 0xf000) {
case 0x0a:
case 0x0b:
if (mapperReadRAM)
return mapperReadRAM(address);
break;
case 0x0f:
if (address > 0xff00) {
switch (address & 0x00ff) {
case 0x02:
return (gbMemory[0xff02]);
case 0x03:
return (0xff);
case 0x04:
return register_DIV;
case 0x05:
return register_TIMA;
case 0x06:
return register_TMA;
case 0x07:
return (0xf8 | register_TAC);
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0c:
case 0x0d:
case 0x0e:
return (0xff);
case 0x0f:
return (0xe0 | gbMemory[0xff0f]);
case 0x40:
return register_LCDC;
case 0x41:
// This is a GB/C only bug (ie. not GBA/SP).
if ((gbHardware & 7) && (gbLcdMode == 2) && (gbLcdModeDelayed == 1) && (!gbSpeed))
return (0x80 | (gbMemory[0xff41] & 0xFC));
else
return (0x80 | gbMemory[0xff41]);
case 0x42:
return register_SCY;
case 0x43:
return register_SCX;
case 0x44:
if (((gbHardware & 7) && ((gbLcdMode == 1) && (gbLcdTicks == 0x71))) || (!(register_LCDC & 0x80)))
return 0;
else
return register_LY;
case 0x45:
return register_LYC;
case 0x46:
return register_DMA;
case 0x4a:
return register_WY;
case 0x4b:
return register_WX;
case 0x4c:
return 0xff;
case 0x4f:
return (0xfe | register_VBK);
case 0x51:
return register_HDMA1;
case 0x52:
return register_HDMA2;
case 0x53:
return register_HDMA3;
case 0x54:
return register_HDMA4;
case 0x55:
return register_HDMA5;
case 0x68:
case 0x6a:
if (gbCgbMode)
return (0x40 | gbMemory[address]);
else
return 0xc0;
case 0x69:
case 0x6b:
if (gbCgbMode) {
// No access to gbPalette during mode 3 (Color Panel Demo)
if (((gbLcdModeDelayed != 3) && (!((gbLcdMode == 0) && (gbLcdTicks >= (GBLCD_MODE_0_CLOCK_TICKS - gbSpritesTicks[299] - 1)))) && (!gbSpeed)) || (gbSpeed && ((gbLcdMode == 1) || (gbLcdMode == 2) || ((gbLcdMode == 3) && (gbLcdTicks > (GBLCD_MODE_3_CLOCK_TICKS - 2))) || ((gbLcdMode == 0) && (gbLcdTicks <= (GBLCD_MODE_0_CLOCK_TICKS - gbSpritesTicks[299] - 2))))))
return (gbMemory[address]);
else
return 0xff;
} else
return 0xff;
case 0x70:
if (gbCgbMode)
return (0xf8 | register_SVBK);
else
return 0xff;
case 0xff:
return register_IE;
}
}
// OAM not accessible during mode 2 & 3.
if (((address >= 0xfe00) && (address < 0xfea0)) && ((gbLcdMode | gbLcdModeDelayed) & 2))
return 0xff;
break;
}
if ((address >= 0xfea0) && (address < 0xff00)) {
if (gbHardware & 1)
return ((((address + ((address >> 4) - 0xfea)) >> 2) & 1) ? 0x00 : 0xff);
else if (gbHardware & 2)
return gbMemoryMap[address >> 12][address & 0x0fff];
else if (gbHardware & 4)
return ((((address + ((address >> 4) - 0xfea)) >> 2) & 1) ? 0xff : 0x00);
else if (gbHardware & 8)
return ((address & 0xf0) | ((address & 0xf0) >> 4));
}
return gbMemoryMap[address >> 12][address & 0x0fff];
}
uint8_t gbReadMemory(register uint16_t address) uint8_t gbReadMemory(register uint16_t address)
{ {
if (gbCheatMap[address]) if (gbCheatMap[address])
@ -1858,6 +1720,7 @@ uint8_t gbReadMemory(register uint16_t address)
return 0xff; return 0xff;
} }
// Used for the mirroring of 0xC000 in 0xE000
if ((address >= 0xe000) && (address < 0xfe00)) if ((address >= 0xe000) && (address < 0xfe00))
address &= ~0x2000; address &= ~0x2000;
@ -1974,6 +1837,11 @@ uint8_t gbReadMemory(register uint16_t address)
return gbMemory[0xff01]; return gbMemory[0xff01];
case 0x02: case 0x02:
return (gbMemory[0xff02]); return (gbMemory[0xff02]);
case 0x03:
log("Undocumented Memory register read %04x PC=%04x\n",
address,
PC.W);
return 0xff;
case 0x04: case 0x04:
return register_DIV; return register_DIV;
case 0x05: case 0x05:
@ -1982,6 +1850,17 @@ uint8_t gbReadMemory(register uint16_t address)
return register_TMA; return register_TMA;
case 0x07: case 0x07:
return (0xf8 | register_TAC); return (0xf8 | register_TAC);
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0c:
case 0x0d:
case 0x0e:
log("Undocumented Memory register read %04x PC=%04x\n",
address,
PC.W);
return 0xff;
case 0x0f: case 0x0f:
return (0xe0 | gbMemory[0xff0f]); return (0xe0 | gbMemory[0xff0f]);
case 0x30: case 0x30:
@ -2018,7 +1897,7 @@ uint8_t gbReadMemory(register uint16_t address)
return register_SCX; return register_SCX;
case 0x44: case 0x44:
if (((gbHardware & 7) && ((gbLcdMode == 1) && (gbLcdTicks == 0x71))) || (!(register_LCDC & 0x80))) if (((gbHardware & 7) && ((gbLcdMode == 1) && (gbLcdTicks == 0x71))) || (!(register_LCDC & 0x80)))
return (0); return 0;
else else
return register_LY; return register_LY;
case 0x45: case 0x45:
@ -2029,6 +1908,8 @@ uint8_t gbReadMemory(register uint16_t address)
return register_WY; return register_WY;
case 0x4b: case 0x4b:
return register_WX; return register_WX;
case 0x4c:
return 0xff;
case 0x4f: case 0x4f:
return (0xfe | register_VBK); return (0xfe | register_VBK);
case 0x51: case 0x51:
@ -4630,7 +4511,7 @@ void gbEmulate(int ticksToStop)
opcode2 = 0; opcode2 = 0;
execute = true; execute = true;
opcode2 = opcode1 = opcode = gbReadOpcode(PC.W++); opcode2 = opcode1 = opcode = gbReadMemory(PC.W++);
// If HALT state was launched while IME = 0 and (register_IF & register_IE & 0x1F), // If HALT state was launched while IME = 0 and (register_IF & register_IE & 0x1F),
// PC.W is not incremented for the first byte of the next instruction. // PC.W is not incremented for the first byte of the next instruction.
@ -4644,7 +4525,7 @@ void gbEmulate(int ticksToStop)
switch (opcode) { switch (opcode) {
case 0xCB: case 0xCB:
// extended opcode // extended opcode
opcode2 = opcode = gbReadOpcode(PC.W++); opcode2 = opcode = gbReadMemory(PC.W++);
clockTicks = gbCyclesCB[opcode]; clockTicks = gbCyclesCB[opcode];
break; break;
} }

122
src/gb/gbCodes.h
View File

@ -3,8 +3,8 @@ case 0x00:
break; break;
case 0x01: case 0x01:
// LD BC, NNNN // LD BC, NNNN
BC.B.B0 = gbReadOpcode(PC.W++); BC.B.B0 = gbReadMemory(PC.W++);
BC.B.B1 = gbReadOpcode(PC.W++); BC.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x02: case 0x02:
// LD (BC),A // LD (BC),A
@ -26,7 +26,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[BC.B.B1] | ((BC.B.B1 & 0
break; break;
case 0x06: case 0x06:
// LD B, NN // LD B, NN
BC.B.B1 = gbReadOpcode(PC.W++); BC.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x07: case 0x07:
// RLCA // RLCA
@ -36,8 +36,8 @@ AF.B.B0 = tempValue;
break; break;
case 0x08: case 0x08:
// LD (NNNN), SP // LD (NNNN), SP
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(tempRegister.W++, SP.B.B0); gbWriteMemory(tempRegister.W++, SP.B.B0);
gbWriteMemory(tempRegister.W, SP.B.B1); gbWriteMemory(tempRegister.W, SP.B.B1);
break; break;
@ -67,7 +67,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[BC.B.B0] | ((BC.B.B0 & 0
break; break;
case 0x0e: case 0x0e:
// LD C, NN // LD C, NN
BC.B.B0 = gbReadOpcode(PC.W++); BC.B.B0 = gbReadMemory(PC.W++);
break; break;
case 0x0f: case 0x0f:
// RRCA // RRCA
@ -77,7 +77,7 @@ AF.B.B0 = (tempValue << 4);
break; break;
case 0x10: case 0x10:
// STOP // STOP
opcode = gbReadOpcode(PC.W++); opcode = gbReadMemory(PC.W++);
if (gbCgbMode) { if (gbCgbMode) {
if (gbMemory[0xff4d] & 1) { if (gbMemory[0xff4d] & 1) {
gbSpeedSwitch(); gbSpeedSwitch();
@ -92,8 +92,8 @@ if (gbCgbMode) {
break; break;
case 0x11: case 0x11:
// LD DE, NNNN // LD DE, NNNN
DE.B.B0 = gbReadOpcode(PC.W++); DE.B.B0 = gbReadMemory(PC.W++);
DE.B.B1 = gbReadOpcode(PC.W++); DE.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x12: case 0x12:
// LD (DE),A // LD (DE),A
@ -115,7 +115,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[DE.B.B1] | ((DE.B.B1 & 0
break; break;
case 0x16: case 0x16:
// LD D,NN // LD D,NN
DE.B.B1 = gbReadOpcode(PC.W++); DE.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x17: case 0x17:
// RLA // RLA
@ -125,7 +125,7 @@ AF.B.B0 = tempValue;
break; break;
case 0x18: case 0x18:
// JR NN // JR NN
PC.W += (int8_t)gbReadOpcode(PC.W) + 1; PC.W += (int8_t)gbReadMemory(PC.W) + 1;
break; break;
case 0x19: case 0x19:
// ADD HL,DE // ADD HL,DE
@ -153,7 +153,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[DE.B.B0] | ((DE.B.B0 & 0
break; break;
case 0x1e: case 0x1e:
// LD E,NN // LD E,NN
DE.B.B0 = gbReadOpcode(PC.W++); DE.B.B0 = gbReadMemory(PC.W++);
break; break;
case 0x1f: case 0x1f:
// RRA // RRA
@ -166,14 +166,14 @@ case 0x20:
if (AF.B.B0 & GB_Z_FLAG) if (AF.B.B0 & GB_Z_FLAG)
PC.W++; PC.W++;
else { else {
PC.W += (int8_t)gbReadOpcode(PC.W) + 1; PC.W += (int8_t)gbReadMemory(PC.W) + 1;
clockTicks++; clockTicks++;
} }
break; break;
case 0x21: case 0x21:
// LD HL,NNNN // LD HL,NNNN
HL.B.B0 = gbReadOpcode(PC.W++); HL.B.B0 = gbReadMemory(PC.W++);
HL.B.B1 = gbReadOpcode(PC.W++); HL.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x22: case 0x22:
// LDI (HL),A // LDI (HL),A
@ -195,7 +195,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[HL.B.B1] | ((HL.B.B1 & 0
break; break;
case 0x26: case 0x26:
// LD H,NN // LD H,NN
HL.B.B1 = gbReadOpcode(PC.W++); HL.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x27: case 0x27:
// DAA // DAA
@ -206,7 +206,7 @@ break;
case 0x28: case 0x28:
// JR Z,NN // JR Z,NN
if (AF.B.B0 & GB_Z_FLAG) { if (AF.B.B0 & GB_Z_FLAG) {
PC.W += (int8_t)gbReadOpcode(PC.W) + 1; PC.W += (int8_t)gbReadMemory(PC.W) + 1;
clockTicks++; clockTicks++;
} else } else
PC.W++; PC.W++;
@ -237,7 +237,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[HL.B.B0] | ((HL.B.B0 & 0
break; break;
case 0x2e: case 0x2e:
// LD L,NN // LD L,NN
HL.B.B0 = gbReadOpcode(PC.W++); HL.B.B0 = gbReadMemory(PC.W++);
break; break;
case 0x2f: case 0x2f:
// CPL // CPL
@ -249,14 +249,14 @@ case 0x30:
if (AF.B.B0 & GB_C_FLAG) if (AF.B.B0 & GB_C_FLAG)
PC.W++; PC.W++;
else { else {
PC.W += (int8_t)gbReadOpcode(PC.W) + 1; PC.W += (int8_t)gbReadMemory(PC.W) + 1;
clockTicks++; clockTicks++;
} }
break; break;
case 0x31: case 0x31:
// LD SP,NNNN // LD SP,NNNN
SP.B.B0 = gbReadOpcode(PC.W++); SP.B.B0 = gbReadMemory(PC.W++);
SP.B.B1 = gbReadOpcode(PC.W++); SP.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x32: case 0x32:
// LDD (HL),A // LDD (HL),A
@ -280,7 +280,7 @@ gbWriteMemory(HL.W, tempValue);
break; break;
case 0x36: case 0x36:
// LD (HL),NN // LD (HL),NN
gbWriteMemory(HL.W, gbReadOpcode(PC.W++)); gbWriteMemory(HL.W, gbReadMemory(PC.W++));
break; break;
case 0x37: case 0x37:
// SCF // SCF
@ -289,7 +289,7 @@ break;
case 0x38: case 0x38:
// JR C,NN // JR C,NN
if (AF.B.B0 & GB_C_FLAG) { if (AF.B.B0 & GB_C_FLAG) {
PC.W += (int8_t)gbReadOpcode(PC.W) + 1; PC.W += (int8_t)gbReadMemory(PC.W) + 1;
clockTicks++; clockTicks++;
} else } else
PC.W++; PC.W++;
@ -320,7 +320,7 @@ AF.B.B0 = GB_N_FLAG | (AF.B.B0 & GB_C_FLAG) | ZeroTable[AF.B.B1] | ((AF.B.B1 & 0
break; break;
case 0x3e: case 0x3e:
// LD A,NN // LD A,NN
AF.B.B1 = gbReadOpcode(PC.W++); AF.B.B1 = gbReadMemory(PC.W++);
break; break;
case 0x3f: case 0x3f:
// CCF // CCF
@ -972,16 +972,16 @@ case 0xc2:
if (AF.B.B0 & GB_Z_FLAG) if (AF.B.B0 & GB_Z_FLAG)
PC.W += 2; PC.W += 2;
else { else {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W); tempRegister.B.B1 = gbReadMemory(PC.W);
PC.W = tempRegister.W; PC.W = tempRegister.W;
clockTicks++; clockTicks++;
} }
break; break;
case 0xc3: case 0xc3:
// JP NNNN // JP NNNN
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W); tempRegister.B.B1 = gbReadMemory(PC.W);
PC.W = tempRegister.W; PC.W = tempRegister.W;
break; break;
case 0xc4: case 0xc4:
@ -989,8 +989,8 @@ case 0xc4:
if (AF.B.B0 & GB_Z_FLAG) if (AF.B.B0 & GB_Z_FLAG)
PC.W += 2; PC.W += 2;
else { else {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(--SP.W, PC.B.B1); gbWriteMemory(--SP.W, PC.B.B1);
gbWriteMemory(--SP.W, PC.B.B0); gbWriteMemory(--SP.W, PC.B.B0);
PC.W = tempRegister.W; PC.W = tempRegister.W;
@ -1004,7 +1004,7 @@ gbWriteMemory(--SP.W, BC.B.B0);
break; break;
case 0xc6: case 0xc6:
// ADD NN // ADD NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
tempRegister.W = AF.B.B1 + tempValue; tempRegister.W = AF.B.B1 + tempValue;
AF.B.B0 = (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0);
AF.B.B1 = tempRegister.B.B0; AF.B.B1 = tempRegister.B.B0;
@ -1031,8 +1031,8 @@ break;
case 0xca: case 0xca:
// JP Z,NNNN // JP Z,NNNN
if (AF.B.B0 & GB_Z_FLAG) { if (AF.B.B0 & GB_Z_FLAG) {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W); tempRegister.B.B1 = gbReadMemory(PC.W);
PC.W = tempRegister.W; PC.W = tempRegister.W;
clockTicks++; clockTicks++;
} else } else
@ -1042,8 +1042,8 @@ break;
case 0xcc: case 0xcc:
// CALL Z,NNNN // CALL Z,NNNN
if (AF.B.B0 & GB_Z_FLAG) { if (AF.B.B0 & GB_Z_FLAG) {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(--SP.W, PC.B.B1); gbWriteMemory(--SP.W, PC.B.B1);
gbWriteMemory(--SP.W, PC.B.B0); gbWriteMemory(--SP.W, PC.B.B0);
PC.W = tempRegister.W; PC.W = tempRegister.W;
@ -1053,15 +1053,15 @@ if (AF.B.B0 & GB_Z_FLAG) {
break; break;
case 0xcd: case 0xcd:
// CALL NNNN // CALL NNNN
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(--SP.W, PC.B.B1); gbWriteMemory(--SP.W, PC.B.B1);
gbWriteMemory(--SP.W, PC.B.B0); gbWriteMemory(--SP.W, PC.B.B0);
PC.W = tempRegister.W; PC.W = tempRegister.W;
break; break;
case 0xce: case 0xce:
// ADC NN // ADC NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
tempRegister.W = AF.B.B1 + tempValue + (AF.B.B0 & GB_C_FLAG ? 1 : 0); tempRegister.W = AF.B.B1 + tempValue + (AF.B.B0 & GB_C_FLAG ? 1 : 0);
AF.B.B0 = (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0);
AF.B.B1 = tempRegister.B.B0; AF.B.B1 = tempRegister.B.B0;
@ -1090,8 +1090,8 @@ case 0xd2:
if (AF.B.B0 & GB_C_FLAG) if (AF.B.B0 & GB_C_FLAG)
PC.W += 2; PC.W += 2;
else { else {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W); tempRegister.B.B1 = gbReadMemory(PC.W);
PC.W = tempRegister.W; PC.W = tempRegister.W;
clockTicks++; clockTicks++;
} }
@ -1106,8 +1106,8 @@ case 0xd4:
if (AF.B.B0 & GB_C_FLAG) if (AF.B.B0 & GB_C_FLAG)
PC.W += 2; PC.W += 2;
else { else {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(--SP.W, PC.B.B1); gbWriteMemory(--SP.W, PC.B.B1);
gbWriteMemory(--SP.W, PC.B.B0); gbWriteMemory(--SP.W, PC.B.B0);
PC.W = tempRegister.W; PC.W = tempRegister.W;
@ -1121,7 +1121,7 @@ gbWriteMemory(--SP.W, DE.B.B0);
break; break;
case 0xd6: case 0xd6:
// SUB NN // SUB NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
tempRegister.W = AF.B.B1 - tempValue; tempRegister.W = AF.B.B1 - tempValue;
AF.B.B0 = GB_N_FLAG | (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = GB_N_FLAG | (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0);
AF.B.B1 = tempRegister.B.B0; AF.B.B1 = tempRegister.B.B0;
@ -1149,8 +1149,8 @@ break;
case 0xda: case 0xda:
// JP C,NNNN // JP C,NNNN
if (AF.B.B0 & GB_C_FLAG) { if (AF.B.B0 & GB_C_FLAG) {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W); tempRegister.B.B1 = gbReadMemory(PC.W);
PC.W = tempRegister.W; PC.W = tempRegister.W;
clockTicks++; clockTicks++;
} else } else
@ -1164,8 +1164,8 @@ break;
case 0xdc: case 0xdc:
// CALL C,NNNN // CALL C,NNNN
if (AF.B.B0 & GB_C_FLAG) { if (AF.B.B0 & GB_C_FLAG) {
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(--SP.W, PC.B.B1); gbWriteMemory(--SP.W, PC.B.B1);
gbWriteMemory(--SP.W, PC.B.B0); gbWriteMemory(--SP.W, PC.B.B0);
PC.W = tempRegister.W; PC.W = tempRegister.W;
@ -1180,7 +1180,7 @@ IFF = 0;
break; break;
case 0xde: case 0xde:
// SBC NN // SBC NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
tempRegister.W = AF.B.B1 - tempValue - (AF.B.B0 & GB_C_FLAG ? 1 : 0); tempRegister.W = AF.B.B1 - tempValue - (AF.B.B0 & GB_C_FLAG ? 1 : 0);
AF.B.B0 = GB_N_FLAG | (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = GB_N_FLAG | (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0);
AF.B.B1 = tempRegister.B.B0; AF.B.B1 = tempRegister.B.B0;
@ -1193,7 +1193,7 @@ PC.W = 0x0018;
break; break;
case 0xe0: case 0xe0:
// LD (FF00+NN),A // LD (FF00+NN),A
gbWriteMemory(0xff00 + gbReadOpcode(PC.W++), AF.B.B1); gbWriteMemory(0xff00 + gbReadMemory(PC.W++), AF.B.B1);
break; break;
case 0xe1: case 0xe1:
// POP HL // POP HL
@ -1218,7 +1218,7 @@ gbWriteMemory(--SP.W, HL.B.B0);
break; break;
case 0xe6: case 0xe6:
// AND NN // AND NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
AF.B.B1 &= tempValue; AF.B.B1 &= tempValue;
AF.B.B0 = GB_H_FLAG | ZeroTable[AF.B.B1]; AF.B.B0 = GB_H_FLAG | ZeroTable[AF.B.B1];
break; break;
@ -1230,7 +1230,7 @@ PC.W = 0x0020;
break; break;
case 0xe8: case 0xe8:
// ADD SP,NN // ADD SP,NN
offset = (int8_t)gbReadOpcode(PC.W++); offset = (int8_t)gbReadMemory(PC.W++);
tempRegister.W = SP.W + offset; tempRegister.W = SP.W + offset;
AF.B.B0 = ((SP.W ^ offset ^ tempRegister.W) & 0x100 ? GB_C_FLAG : 0) | ((SP.W ^ offset ^ tempRegister.W) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = ((SP.W ^ offset ^ tempRegister.W) & 0x100 ? GB_C_FLAG : 0) | ((SP.W ^ offset ^ tempRegister.W) & 0x10 ? GB_H_FLAG : 0);
SP.W = tempRegister.W; SP.W = tempRegister.W;
@ -1241,8 +1241,8 @@ PC.W = HL.W;
break; break;
case 0xea: case 0xea:
// LD (NNNN),A // LD (NNNN),A
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
gbWriteMemory(tempRegister.W, AF.B.B1); gbWriteMemory(tempRegister.W, AF.B.B1);
break; break;
// EB illegal // EB illegal
@ -1256,7 +1256,7 @@ IFF = 0;
break; break;
case 0xee: case 0xee:
// XOR NN // XOR NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
AF.B.B1 ^= tempValue; AF.B.B1 ^= tempValue;
AF.B.B0 = ZeroTable[AF.B.B1]; AF.B.B0 = ZeroTable[AF.B.B1];
break; break;
@ -1268,7 +1268,7 @@ PC.W = 0x0028;
break; break;
case 0xf0: case 0xf0:
// LD A,(FF00+NN) // LD A,(FF00+NN)
AF.B.B1 = gbReadMemory(0xff00 + gbReadOpcode(PC.W++)); AF.B.B1 = gbReadMemory(0xff00 + gbReadMemory(PC.W++));
break; break;
case 0xf1: case 0xf1:
// POP AF // POP AF
@ -1296,7 +1296,7 @@ gbWriteMemory(--SP.W, AF.B.B0);
break; break;
case 0xf6: case 0xf6:
// OR NN // OR NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
AF.B.B1 |= tempValue; AF.B.B1 |= tempValue;
AF.B.B0 = ZeroTable[AF.B.B1]; AF.B.B0 = ZeroTable[AF.B.B1];
break; break;
@ -1308,7 +1308,7 @@ PC.W = 0x0030;
break; break;
case 0xf8: case 0xf8:
// LD HL,SP+NN // LD HL,SP+NN
offset = (int8_t)gbReadOpcode(PC.W++); offset = (int8_t)gbReadMemory(PC.W++);
tempRegister.W = SP.W + offset; tempRegister.W = SP.W + offset;
AF.B.B0 = ((SP.W ^ offset ^ tempRegister.W) & 0x100 ? GB_C_FLAG : 0) | ((SP.W ^ offset ^ tempRegister.W) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = ((SP.W ^ offset ^ tempRegister.W) & 0x100 ? GB_C_FLAG : 0) | ((SP.W ^ offset ^ tempRegister.W) & 0x10 ? GB_H_FLAG : 0);
HL.W = tempRegister.W; HL.W = tempRegister.W;
@ -1319,8 +1319,8 @@ SP.W = HL.W;
break; break;
case 0xfa: case 0xfa:
// LD A,(NNNN) // LD A,(NNNN)
tempRegister.B.B0 = gbReadOpcode(PC.W++); tempRegister.B.B0 = gbReadMemory(PC.W++);
tempRegister.B.B1 = gbReadOpcode(PC.W++); tempRegister.B.B1 = gbReadMemory(PC.W++);
AF.B.B1 = gbReadMemory(tempRegister.W); AF.B.B1 = gbReadMemory(tempRegister.W);
break; break;
case 0xfb: case 0xfb:
@ -1344,7 +1344,7 @@ IFF = 0;
break; break;
case 0xfe: case 0xfe:
// CP NN // CP NN
tempValue = gbReadOpcode(PC.W++); tempValue = gbReadMemory(PC.W++);
tempRegister.W = AF.B.B1 - tempValue; tempRegister.W = AF.B.B1 - tempValue;
AF.B.B0 = GB_N_FLAG | (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0); AF.B.B0 = GB_N_FLAG | (tempRegister.B.B1 ? GB_C_FLAG : 0) | ZeroTable[tempRegister.B.B0] | ((AF.B.B1 ^ tempValue ^ tempRegister.B.B0) & 0x10 ? GB_H_FLAG : 0);
break; break;
@ -1356,7 +1356,7 @@ PC.W = 0x0038;
break; break;
default: default:
if (gbSystemMessage == false) { if (gbSystemMessage == false) {
systemMessage(0, N_("Unknown opcode %02x at %04x"), gbReadOpcode(PC.W - 1), PC.W - 1); systemMessage(0, N_("Unknown opcode %02x at %04x"), gbReadMemory(PC.W - 1), PC.W - 1);
gbSystemMessage = true; gbSystemMessage = true;
} }
return; return;

2
src/gb/gbCodesCB.h
View File

@ -1264,7 +1264,7 @@ AF.B.B1 |= 1 << 7;
break; break;
default: default:
if (gbSystemMessage == false) { if (gbSystemMessage == false) {
systemMessage(0, N_("Unknown opcode %02x at %04x"), gbReadOpcode(PC.W - 1), PC.W - 1); systemMessage(0, N_("Unknown opcode %02x at %04x"), gbReadMemory(PC.W - 1), PC.W - 1);
gbSystemMessage = true; gbSystemMessage = true;
} }
return; return;