diff options
Diffstat (limited to 'instruction-init.h')
| -rw-r--r-- | instruction-init.h | 256 |
1 files changed, 15 insertions, 241 deletions
diff --git a/instruction-init.h b/instruction-init.h index adb5047..12cdfa4 100644 --- a/instruction-init.h +++ b/instruction-init.h @@ -6,15 +6,7 @@ void* IT; void (*func)(Addressing, address); -void setIT(int i, uintptr_t p, Addressing r){ - uintptr_t* p1 = (IT + (sizeof(uintptr_t)*i)); - *p1 = p; - - Addressing* r1 = (IT + (sizeof(uintptr_t)*256) + (sizeof(Addressing)*i)); - *r1 = r; - - printf("DEBUG:\t%x\t%x -> %x\t%x -> %x\n", i, p1, *p1, r1, *r1); -} +#define InstructionTableSize (256*(sizeof(uintptr_t) + sizeof(Addressing))) /* uintptr_t getITFunction(int i){ //Segmentation fault is occurring here, likely in next one too @@ -30,12 +22,25 @@ Addressing getITAddressing(int i){ void callIT(int i, address val){ - uintptr_t a = ((uintptr_t)IT + (sizeof(uintptr_t) * i)); + uintptr_t a = (IT + (sizeof(uintptr_t) * i)); memcpy(&func, a, sizeof(uintptr_t)); Addressing* r = (IT + ((sizeof(uintptr_t)*256) + (sizeof(Addressing) * i))); func(*r, val); } +void initIT(){ + IT = malloc(InstructionTableSize); + FILE* fs = fopen("instructions.bin", "r"); + + /*if (fs == NULL){ + system("instruction-dump"); + }*/ + for(char* c = IT; c < (IT + InstructionTableSize); c++){ //NEED TO MAKE (IT + (256*(sizeof(uintptr_t) + sizeof(Addressing)))) a macro + *c = fgetc(fs); + } //Investigate whether doing word sized units would increase speed + fclose(fs); + //read in the instruction data binary +} @@ -107,236 +112,5 @@ void fSEI(Addressing, address); void fNOP(Addressing, address); void fBRK(Addressing, address); -void initIT(){ //Change this to load a binary file which contains this same information. - //So will need to dump the contents of IT at some point. - IT = malloc(256 * (sizeof(uintptr_t) + sizeof(Addressing))); - - // Load and Store Instructions - // fLDA(Addressing, address); - setIT(0xA9, (uintptr_t)&fLDA, eImmediate); - setIT(0xA5, (uintptr_t)&fLDA, eZeroPage); - setIT(0xB5, (uintptr_t)&fLDA, eZeroPageIndexedX); - setIT(0xAD, (uintptr_t)&fLDA, eAbsolute); - setIT(0xBD, (uintptr_t)&fLDA, eAbsoluteIndexedX); - setIT(0xB9, (uintptr_t)&fLDA, eAbsoluteIndexedY); - setIT(0xA1, (uintptr_t)&fLDA, eIndexedIndirect); - setIT(0xB1, (uintptr_t)&fLDA, eIndirectIndexed); - // fLDX(Addressing, address); - setIT(0xA2, (uintptr_t)&fLDX, eImmediate); - setIT(0xA6, (uintptr_t)&fLDX, eZeroPage); - setIT(0xB6, (uintptr_t)&fLDX, eZeroPageIndexedY); - setIT(0xAE, (uintptr_t)&fLDX, eAbsolute); - setIT(0xBE, (uintptr_t)&fLDX, eAbsoluteIndexedY); - // fLDY(Addressing, address); - setIT(0xA0, (uintptr_t)&fLDY, eImmediate); - setIT(0xA4, (uintptr_t)&fLDY, eZeroPage); - setIT(0xB4, (uintptr_t)&fLDY, eZeroPageIndexedX); - setIT(0xAC, (uintptr_t)&fLDY, eAbsolute); - setIT(0xBC, (uintptr_t)&fLDY, eAbsoluteIndexedX); - // fSTA(Addressing, address); - setIT(0x85, (uintptr_t)&fSTA, eZeroPage); - setIT(0x95, (uintptr_t)&fSTA, eZeroPageIndexedX); - setIT(0x8D, (uintptr_t)&fSTA, eAbsolute); - setIT(0x9D, (uintptr_t)&fSTA, eAbsoluteIndexedX); - setIT(0x99, (uintptr_t)&fSTA, eAbsoluteIndexedY); - setIT(0x81, (uintptr_t)&fSTA, eIndexedIndirect); - setIT(0x91, (uintptr_t)&fSTA, eIndirectIndexed); - // fSTX(Addressing, address); - setIT(0x86, (uintptr_t)&fSTX, eZeroPage); - setIT(0x96, (uintptr_t)&fSTX, eZeroPageIndexedX); - setIT(0x8E, (uintptr_t)&fSTX, eAbsolute); - // fSTY(Addressing, address); - setIT(0x84, (uintptr_t)&fSTY, eZeroPage); - setIT(0x94, (uintptr_t)&fSTY, eZeroPageIndexedY); - setIT(0x8C, (uintptr_t)&fSTY, eAbsolute); - - // Arithmetic Instructions - // fADC(Addressing, address); - setIT(0x69, (uintptr_t)&fADC, eImmediate); - setIT(0x65, (uintptr_t)&fADC, eZeroPage); - setIT(0x75, (uintptr_t)&fADC, eZeroPageIndexedX); - setIT(0x6D, (uintptr_t)&fADC, eAbsolute); - setIT(0x7D, (uintptr_t)&fADC, eAbsoluteIndexedX); - setIT(0x79, (uintptr_t)&fADC, eAbsoluteIndexedY); - setIT(0x61, (uintptr_t)&fADC, eIndexedIndirect); - setIT(0x71, (uintptr_t)&fADC, eIndirectIndexed); - // fSBC(Addressing, address); - setIT(0xE9, (uintptr_t)&fSBC, eImmediate); - setIT(0xE5, (uintptr_t)&fSBC, eZeroPage); - setIT(0xF5, (uintptr_t)&fSBC, eZeroPageIndexedX); - setIT(0xED, (uintptr_t)&fSBC, eAbsolute); - setIT(0xFD, (uintptr_t)&fSBC, eAbsoluteIndexedX); - setIT(0xF9, (uintptr_t)&fSBC, eAbsoluteIndexedY); - setIT(0xE1, (uintptr_t)&fSBC, eIndexedIndirect); - setIT(0xF1, (uintptr_t)&fSBC, eIndirectIndexed); - - //Increment and Decrement Instructions - //INC(Addressing, address); - setIT(0xE6, (uintptr_t)&fINC, eZeroPage); - setIT(0xF6, (uintptr_t)&fINC, eZeroPageIndexedX); - setIT(0xEE, (uintptr_t)&fINC, eAbsolute); - setIT(0xFE, (uintptr_t)&fINC, eAbsoluteIndexedX); - //INX(Addressing, address); - setIT(0xE8, (uintptr_t)&fINX, eImplied); - //INY(Addressing, address); - setIT(0xC8, (uintptr_t)&fINY, eImplied); - //DEC(Addressing, address); - setIT(0xC6, (uintptr_t)&fDEC, eZeroPage); - setIT(0xD6, (uintptr_t)&fDEC, eZeroPageIndexedX); - setIT(0xCE, (uintptr_t)&fDEC, eAbsolute); - setIT(0xDE, (uintptr_t)&fDEC, eAbsoluteIndexedX); - //DEX(Addressing, address); - setIT(0xCA, (uintptr_t)&fDEX, eImplied); - //DEY(Addressing, address); - setIT(0x88, (uintptr_t)&fDEY, eImplied); - - // Logical Instructions - //AND(Addressing, address); - setIT(0x29, (uintptr_t)&fAND, eImmediate); - setIT(0x25, (uintptr_t)&fAND, eZeroPage); - setIT(0x35, (uintptr_t)&fAND, eZeroPageIndexedX); - setIT(0x2D, (uintptr_t)&fAND, eAbsolute); - setIT(0x3D, (uintptr_t)&fAND, eAbsoluteIndexedX); - setIT(0x39, (uintptr_t)&fAND, eAbsoluteIndexedY); - setIT(0x21, (uintptr_t)&fAND, eIndexedIndirect); - setIT(0x31, (uintptr_t)&fAND, eIndirectIndexed); - //ORA(Addressing, address); - setIT(0x09, (uintptr_t)&fORA, eImmediate); - setIT(0x05, (uintptr_t)&fORA, eZeroPage); - setIT(0x15, (uintptr_t)&fORA, eZeroPageIndexedX); - setIT(0x0D, (uintptr_t)&fORA, eAbsolute); - setIT(0x1D, (uintptr_t)&fORA, eAbsoluteIndexedX); - setIT(0x19, (uintptr_t)&fORA, eAbsoluteIndexedY); - setIT(0x01, (uintptr_t)&fORA, eIndexedIndirect); - setIT(0x11, (uintptr_t)&fORA, eIndirectIndexed); - //EOR(Addressing, address); - setIT(0x49, (uintptr_t)&fEOR, eImmediate); - setIT(0x45, (uintptr_t)&fEOR, eZeroPage); - setIT(0x55, (uintptr_t)&fEOR, eZeroPageIndexedX); - setIT(0x4D, (uintptr_t)&fEOR, eAbsolute); - setIT(0x5D, (uintptr_t)&fEOR, eAbsoluteIndexedX); - setIT(0x59, (uintptr_t)&fEOR, eAbsoluteIndexedY); - setIT(0x41, (uintptr_t)&fEOR, eIndexedIndirect); - setIT(0x51, (uintptr_t)&fEOR, eIndirectIndexed); - - // Jump, Branch, Compare, and Test Bits - //JMP(Addressing, address); - setIT(0x4C, (uintptr_t)&fJMP, eAbsolute); - setIT(0x6C, (uintptr_t)&fJMP, eIndirectAbsolute); - //BCC(Addressing, address); - setIT(0x90, (uintptr_t)&fBCC, eRelative); - //BCS(Addressing, address); - setIT(0xB0, (uintptr_t)&fBCS, eRelative); - //BEQ(Addressing, address); - setIT(0xF0, (uintptr_t)&fBEQ, eRelative); - //BNE(Addressing, address); - setIT(0xD0, (uintptr_t)&fBNE, eRelative); - //BMI(Addressing, address); - setIT(0x30, (uintptr_t)&fBMI, eRelative); - //BPL(Addressing, address); - setIT(0x10, (uintptr_t)&fBPL, eRelative); - //BVS(Addressing, address); - setIT(0x70, (uintptr_t)&fBVS, eRelative); - //BVC(Addressing, address); - setIT(0x50, (uintptr_t)&fBVC, eRelative); - //CMP(Addressing, address); - setIT(0xC9, (uintptr_t)&fCMP, eImmediate); - setIT(0xC5, (uintptr_t)&fCMP, eZeroPage); - setIT(0xD5, (uintptr_t)&fCMP, eZeroPageIndexedX); - setIT(0xCD, (uintptr_t)&fCMP, eAbsolute); - setIT(0xDD, (uintptr_t)&fCMP, eAbsoluteIndexedX); - setIT(0xD9, (uintptr_t)&fCMP, eAbsoluteIndexedY); - setIT(0xC1, (uintptr_t)&fCMP, eIndexedIndirect); - setIT(0xD1, (uintptr_t)&fCMP, eIndirectIndexed); - //CPX(Addressing, address); - setIT(0xE0, (uintptr_t)&fCPX, eImmediate); - setIT(0xE4, (uintptr_t)&fCPX, eZeroPage); - setIT(0xEC, (uintptr_t)&fCPX, eAbsolute); - //CPY(Addressing, address); - setIT(0xC0, (uintptr_t)&fCPY, eImmediate); - setIT(0xC4, (uintptr_t)&fCPY, eZeroPage); - setIT(0xCC, (uintptr_t)&fCPY, eAbsolute); - //BIT(Addressing, address); - setIT(0x4C, (uintptr_t)&fBIT, eZeroPage); - setIT(0x6C, (uintptr_t)&fBIT, eAbsolute); - - // Shift and Rotate Instructions - //ASL(Addressing, address); - setIT(0x0A, (uintptr_t)&fASL, eAccumulator); - setIT(0x06, (uintptr_t)&fASL, eZeroPage); - setIT(0x16, (uintptr_t)&fASL, eZeroPageIndexedX); - setIT(0x0E, (uintptr_t)&fASL, eAbsolute); - setIT(0x1E, (uintptr_t)&fASL, eAbsoluteIndexedX); - //LSR(Addressing, address); - setIT(0x4A, (uintptr_t)&fLSR, eAccumulator); - setIT(0x46, (uintptr_t)&fLSR, eZeroPage); - setIT(0x56, (uintptr_t)&fLSR, eZeroPageIndexedX); - setIT(0x4E, (uintptr_t)&fLSR, eAbsolute); - setIT(0x5E, (uintptr_t)&fLSR, eAbsoluteIndexedX); - //ROL(Addressing, address); - setIT(0x2A, (uintptr_t)&fROL, eAccumulator); - setIT(0x26, (uintptr_t)&fROL, eZeroPage); - setIT(0x36, (uintptr_t)&fROL, eZeroPageIndexedX); - setIT(0x2E, (uintptr_t)&fROL, eAbsolute); - setIT(0x3E, (uintptr_t)&fROL, eAbsoluteIndexedX); - //ROR(Addressing, address); - setIT(0x6A, (uintptr_t)&fROR, eAccumulator); - setIT(0x66, (uintptr_t)&fROR, eZeroPage); - setIT(0x76, (uintptr_t)&fROR, eZeroPageIndexedX); - setIT(0x6E, (uintptr_t)&fROR, eAbsolute); - setIT(0x7E, (uintptr_t)&fROR, eAbsoluteIndexedX); - - // Transfer Instructions - //TAX(Addressing, address); - setIT(0xAA, (uintptr_t)&fTAX, eImplied); - //TAY(Addressing, address); - setIT(0xA8, (uintptr_t)&fTAY, eImplied); - //TXA(Addressing, address); - setIT(0x8A, (uintptr_t)&fTXA, eImplied); - //TYA(Addressing, address); - setIT(0x98, (uintptr_t)&fTYA, eImplied); - - // Stack Instructions - //TSX(Addressing, address); - setIT(0xBA, (uintptr_t)&fTSX, eImplied); - //TXS(Addressing, address); - setIT(0x9A, (uintptr_t)&fTXS, eImplied); - //PHA(Addressing, address); - setIT(0x48, (uintptr_t)&fPHA, eImplied); - //PHP(Addressing, address); - setIT(0x08, (uintptr_t)&fPHP, eImplied); - //PLA(Addressing, address); - setIT(0x68, (uintptr_t)&fPLA, eImplied); - //PLP(Addressing, address); - setIT(0x28, (uintptr_t)&fPLP, eImplied); - - // Subroutine Instructions - //JSR(Addressing, address); - setIT(0x20, (uintptr_t)&fJSR, eAbsolute); - //RTS(Addressing, address); - setIT(0x60, (uintptr_t)&fRTS, eImplied); - //RTI(Addressing, address); - setIT(0x40, (uintptr_t)&fRTI, eImplied); - // Set/Reset Insutrctions - //CLC(Addressing, address); - setIT(0x18, (uintptr_t)&fCLC, eImplied); - //CLD(Addressing, address); - setIT(0xD8, (uintptr_t)&fCLD, eImplied); - //CLI(Addressing, address); - setIT(0x58, (uintptr_t)&fCLI, eImplied); - //CLV(Addressing, address); - setIT(0xB8, (uintptr_t)&fCLV, eImplied); - //SEC(Addressing, address); - setIT(0x38, (uintptr_t)&fSEC, eImplied); - //SED(Addressing, address); - setIT(0xF8, (uintptr_t)&fSED, eImplied); - //SEI(Addressing, address); - setIT(0x78, (uintptr_t)&fSEI, eImplied); - // NOP/BRK Instructions - //NOP(Addressing, address); - setIT(0xEA, (uintptr_t)&fNOP, eImplied); - //BRK(Addressing, address); - setIT(0x00, (uintptr_t)&fBRK, eImplied); -}
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