diff options
Diffstat (limited to 'headers/instruction-table.h')
| -rw-r--r-- | headers/instruction-table.h | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/headers/instruction-table.h b/headers/instruction-table.h new file mode 100644 index 0000000..bb51adb --- /dev/null +++ b/headers/instruction-table.h @@ -0,0 +1,266 @@ +// instruction-table.h +// Defines the instruction table, and the functions to access it. + +void* InstructionTable; +void (*func)(Addressing, address); + +#define InstructionTableSize (256 * (sizeof(uintptr_t) + sizeof(Addressing))) + +uintptr_t* getInstructionTableFunction(int i){ //Segmentation fault is occurring here, likely in next one too + uintptr_t* r = (InstructionTable + (sizeof(uintptr_t)*i)); + return r; +} + +Addressing* getInstructionTableAddressing(int i){ + Addressing* r = (InstructionTable + (sizeof(uintptr_t)*256) + (sizeof(Addressing)*i)); + return r; +} + +void callInstructionTable(int i, address val){ + uintptr_t a = getInstructionTableFunction(i); + memcpy(&func, a, sizeof(uintptr_t)); + Addressing* r = (InstructionTable + ((sizeof(uintptr_t)*256) + (sizeof(Addressing) * i))); + func(*r, val); +} + +void setInstructionTable(int i, uintptr_t p, Addressing r){ + uintptr_t* p1 = (InstructionTable + (sizeof(uintptr_t)*i)); + *p1 = p; + + Addressing* r1 = (InstructionTable + (sizeof(uintptr_t)*256) + (sizeof(Addressing)*i)); + *r1 = r; +} + +void initInstructionTable(){ + InstructionTable = malloc(InstructionTableSize); + // Load and Store Instructions + // fLDA(Addressing, address); + setInstructionTable(0xA9, (uintptr_t)&fLDA, eImmediate); + setInstructionTable(0xA5, (uintptr_t)&fLDA, eZeroPage); + setInstructionTable(0xB5, (uintptr_t)&fLDA, eZeroPageIndexedX); + setInstructionTable(0xAD, (uintptr_t)&fLDA, eAbsolute); + setInstructionTable(0xBD, (uintptr_t)&fLDA, eAbsoluteIndexedX); + setInstructionTable(0xB9, (uintptr_t)&fLDA, eAbsoluteIndexedY); + setInstructionTable(0xA1, (uintptr_t)&fLDA, eIndexedIndirect); + setInstructionTable(0xB1, (uintptr_t)&fLDA, eIndirectIndexed); + // fLDX(Addressing, address); + setInstructionTable(0xA2, (uintptr_t)&fLDX, eImmediate); + setInstructionTable(0xA6, (uintptr_t)&fLDX, eZeroPage); + setInstructionTable(0xB6, (uintptr_t)&fLDX, eZeroPageIndexedY); + setInstructionTable(0xAE, (uintptr_t)&fLDX, eAbsolute); + setInstructionTable(0xBE, (uintptr_t)&fLDX, eAbsoluteIndexedY); + // fLDY(Addressing, address); + setInstructionTable(0xA0, (uintptr_t)&fLDY, eImmediate); + setInstructionTable(0xA4, (uintptr_t)&fLDY, eZeroPage); + setInstructionTable(0xB4, (uintptr_t)&fLDY, eZeroPageIndexedX); + setInstructionTable(0xAC, (uintptr_t)&fLDY, eAbsolute); + setInstructionTable(0xBC, (uintptr_t)&fLDY, eAbsoluteIndexedX); + // fSTA(Addressing, address); + setInstructionTable(0x85, (uintptr_t)&fSTA, eZeroPage); + setInstructionTable(0x95, (uintptr_t)&fSTA, eZeroPageIndexedX); + setInstructionTable(0x8D, (uintptr_t)&fSTA, eAbsolute); + setInstructionTable(0x9D, (uintptr_t)&fSTA, eAbsoluteIndexedX); + setInstructionTable(0x99, (uintptr_t)&fSTA, eAbsoluteIndexedY); + setInstructionTable(0x81, (uintptr_t)&fSTA, eIndexedIndirect); + setInstructionTable(0x91, (uintptr_t)&fSTA, eIndirectIndexed); + // fSTX(Addressing, address); + setInstructionTable(0x86, (uintptr_t)&fSTX, eZeroPage); + setInstructionTable(0x96, (uintptr_t)&fSTX, eZeroPageIndexedX); + setInstructionTable(0x8E, (uintptr_t)&fSTX, eAbsolute); + // fSTY(Addressing, address); + setInstructionTable(0x84, (uintptr_t)&fSTY, eZeroPage); + setInstructionTable(0x94, (uintptr_t)&fSTY, eZeroPageIndexedY); + setInstructionTable(0x8C, (uintptr_t)&fSTY, eAbsolute); + + // Arithmetic Instructions + // fADC(Addressing, address); + setInstructionTable(0x69, (uintptr_t)&fADC, eImmediate); + setInstructionTable(0x65, (uintptr_t)&fADC, eZeroPage); + setInstructionTable(0x75, (uintptr_t)&fADC, eZeroPageIndexedX); + setInstructionTable(0x6D, (uintptr_t)&fADC, eAbsolute); + setInstructionTable(0x7D, (uintptr_t)&fADC, eAbsoluteIndexedX); + setInstructionTable(0x79, (uintptr_t)&fADC, eAbsoluteIndexedY); + setInstructionTable(0x61, (uintptr_t)&fADC, eIndexedIndirect); + setInstructionTable(0x71, (uintptr_t)&fADC, eIndirectIndexed); + // fSBC(Addressing, address); + setInstructionTable(0xE9, (uintptr_t)&fSBC, eImmediate); + setInstructionTable(0xE5, (uintptr_t)&fSBC, eZeroPage); + setInstructionTable(0xF5, (uintptr_t)&fSBC, eZeroPageIndexedX); + setInstructionTable(0xED, (uintptr_t)&fSBC, eAbsolute); + setInstructionTable(0xFD, (uintptr_t)&fSBC, eAbsoluteIndexedX); + setInstructionTable(0xF9, (uintptr_t)&fSBC, eAbsoluteIndexedY); + setInstructionTable(0xE1, (uintptr_t)&fSBC, eIndexedIndirect); + setInstructionTable(0xF1, (uintptr_t)&fSBC, eIndirectIndexed); + + //Increment and Decrement Instructions + //INC(Addressing, address); + setInstructionTable(0xE6, (uintptr_t)&fINC, eZeroPage); + setInstructionTable(0xF6, (uintptr_t)&fINC, eZeroPageIndexedX); + setInstructionTable(0xEE, (uintptr_t)&fINC, eAbsolute); + setInstructionTable(0xFE, (uintptr_t)&fINC, eAbsoluteIndexedX); + //INX(Addressing, address); + setInstructionTable(0xE8, (uintptr_t)&fINX, eImplied); + //INY(Addressing, address); + setInstructionTable(0xC8, (uintptr_t)&fINY, eImplied); + //DEC(Addressing, address); + setInstructionTable(0xC6, (uintptr_t)&fDEC, eZeroPage); + setInstructionTable(0xD6, (uintptr_t)&fDEC, eZeroPageIndexedX); + setInstructionTable(0xCE, (uintptr_t)&fDEC, eAbsolute); + setInstructionTable(0xDE, (uintptr_t)&fDEC, eAbsoluteIndexedX); + //DEX(Addressing, address); + setInstructionTable(0xCA, (uintptr_t)&fDEX, eImplied); + //DEY(Addressing, address); + setInstructionTable(0x88, (uintptr_t)&fDEY, eImplied); + + // Logical Instructions + //AND(Addressing, address); + setInstructionTable(0x29, (uintptr_t)&fAND, eImmediate); + setInstructionTable(0x25, (uintptr_t)&fAND, eZeroPage); + setInstructionTable(0x35, (uintptr_t)&fAND, eZeroPageIndexedX); + setInstructionTable(0x2D, (uintptr_t)&fAND, eAbsolute); + setInstructionTable(0x3D, (uintptr_t)&fAND, eAbsoluteIndexedX); + setInstructionTable(0x39, (uintptr_t)&fAND, eAbsoluteIndexedY); + setInstructionTable(0x21, (uintptr_t)&fAND, eIndexedIndirect); + setInstructionTable(0x31, (uintptr_t)&fAND, eIndirectIndexed); + //ORA(Addressing, address); + setInstructionTable(0x09, (uintptr_t)&fORA, eImmediate); + setInstructionTable(0x05, (uintptr_t)&fORA, eZeroPage); + setInstructionTable(0x15, (uintptr_t)&fORA, eZeroPageIndexedX); + setInstructionTable(0x0D, (uintptr_t)&fORA, eAbsolute); + setInstructionTable(0x1D, (uintptr_t)&fORA, eAbsoluteIndexedX); + setInstructionTable(0x19, (uintptr_t)&fORA, eAbsoluteIndexedY); + setInstructionTable(0x01, (uintptr_t)&fORA, eIndexedIndirect); + setInstructionTable(0x11, (uintptr_t)&fORA, eIndirectIndexed); + //EOR(Addressing, address); + setInstructionTable(0x49, (uintptr_t)&fEOR, eImmediate); + setInstructionTable(0x45, (uintptr_t)&fEOR, eZeroPage); + setInstructionTable(0x55, (uintptr_t)&fEOR, eZeroPageIndexedX); + setInstructionTable(0x4D, (uintptr_t)&fEOR, eAbsolute); + setInstructionTable(0x5D, (uintptr_t)&fEOR, eAbsoluteIndexedX); + setInstructionTable(0x59, (uintptr_t)&fEOR, eAbsoluteIndexedY); + setInstructionTable(0x41, (uintptr_t)&fEOR, eIndexedIndirect); + setInstructionTable(0x51, (uintptr_t)&fEOR, eIndirectIndexed); + + // Jump, Branch, Compare, and Test Bits + //JMP(Addressing, address); + setInstructionTable(0x4C, (uintptr_t)&fJMP, eAbsolute); + setInstructionTable(0x6C, (uintptr_t)&fJMP, eIndirectAbsolute); + //BCC(Addressing, address); + setInstructionTable(0x90, (uintptr_t)&fBCC, eRelative); + //BCS(Addressing, address); + setInstructionTable(0xB0, (uintptr_t)&fBCS, eRelative); + //BEQ(Addressing, address); + setInstructionTable(0xF0, (uintptr_t)&fBEQ, eRelative); + //BNE(Addressing, address); + setInstructionTable(0xD0, (uintptr_t)&fBNE, eRelative); + //BMI(Addressing, address); + setInstructionTable(0x30, (uintptr_t)&fBMI, eRelative); + //BPL(Addressing, address); + setInstructionTable(0x10, (uintptr_t)&fBPL, eRelative); + //BVS(Addressing, address); + setInstructionTable(0x70, (uintptr_t)&fBVS, eRelative); + //BVC(Addressing, address); + setInstructionTable(0x50, (uintptr_t)&fBVC, eRelative); + //CMP(Addressing, address); + setInstructionTable(0xC9, (uintptr_t)&fCMP, eImmediate); + setInstructionTable(0xC5, (uintptr_t)&fCMP, eZeroPage); + setInstructionTable(0xD5, (uintptr_t)&fCMP, eZeroPageIndexedX); + setInstructionTable(0xCD, (uintptr_t)&fCMP, eAbsolute); + setInstructionTable(0xDD, (uintptr_t)&fCMP, eAbsoluteIndexedX); + setInstructionTable(0xD9, (uintptr_t)&fCMP, eAbsoluteIndexedY); + setInstructionTable(0xC1, (uintptr_t)&fCMP, eIndexedIndirect); + setInstructionTable(0xD1, (uintptr_t)&fCMP, eIndirectIndexed); + //CPX(Addressing, address); + setInstructionTable(0xE0, (uintptr_t)&fCPX, eImmediate); + setInstructionTable(0xE4, (uintptr_t)&fCPX, eZeroPage); + setInstructionTable(0xEC, (uintptr_t)&fCPX, eAbsolute); + //CPY(Addressing, address); + setInstructionTable(0xC0, (uintptr_t)&fCPY, eImmediate); + setInstructionTable(0xC4, (uintptr_t)&fCPY, eZeroPage); + setInstructionTable(0xCC, (uintptr_t)&fCPY, eAbsolute); + //BIT(Addressing, address); + setInstructionTable(0x4C, (uintptr_t)&fBIT, eZeroPage); + setInstructionTable(0x6C, (uintptr_t)&fBIT, eAbsolute); + + // Shift and Rotate Instructions + //ASL(Addressing, address); + setInstructionTable(0x0A, (uintptr_t)&fASL, eAccumulator); + setInstructionTable(0x06, (uintptr_t)&fASL, eZeroPage); + setInstructionTable(0x16, (uintptr_t)&fASL, eZeroPageIndexedX); + setInstructionTable(0x0E, (uintptr_t)&fASL, eAbsolute); + setInstructionTable(0x1E, (uintptr_t)&fASL, eAbsoluteIndexedX); + //LSR(Addressing, address); + setInstructionTable(0x4A, (uintptr_t)&fLSR, eAccumulator); + setInstructionTable(0x46, (uintptr_t)&fLSR, eZeroPage); + setInstructionTable(0x56, (uintptr_t)&fLSR, eZeroPageIndexedX); + setInstructionTable(0x4E, (uintptr_t)&fLSR, eAbsolute); + setInstructionTable(0x5E, (uintptr_t)&fLSR, eAbsoluteIndexedX); + //ROL(Addressing, address); + setInstructionTable(0x2A, (uintptr_t)&fROL, eAccumulator); + setInstructionTable(0x26, (uintptr_t)&fROL, eZeroPage); + setInstructionTable(0x36, (uintptr_t)&fROL, eZeroPageIndexedX); + setInstructionTable(0x2E, (uintptr_t)&fROL, eAbsolute); + setInstructionTable(0x3E, (uintptr_t)&fROL, eAbsoluteIndexedX); + //ROR(Addressing, address); + setInstructionTable(0x6A, (uintptr_t)&fROR, eAccumulator); + setInstructionTable(0x66, (uintptr_t)&fROR, eZeroPage); + setInstructionTable(0x76, (uintptr_t)&fROR, eZeroPageIndexedX); + setInstructionTable(0x6E, (uintptr_t)&fROR, eAbsolute); + setInstructionTable(0x7E, (uintptr_t)&fROR, eAbsoluteIndexedX); + + // Transfer Instructions + //TAX(Addressing, address); + setInstructionTable(0xAA, (uintptr_t)&fTAX, eImplied); + //TAY(Addressing, address); + setInstructionTable(0xA8, (uintptr_t)&fTAY, eImplied); + //TXA(Addressing, address); + setInstructionTable(0x8A, (uintptr_t)&fTXA, eImplied); + //TYA(Addressing, address); + setInstructionTable(0x98, (uintptr_t)&fTYA, eImplied); + + // Stack Instructions + //TSX(Addressing, address); + setInstructionTable(0xBA, (uintptr_t)&fTSX, eImplied); + //TXS(Addressing, address); + setInstructionTable(0x9A, (uintptr_t)&fTXS, eImplied); + //PHA(Addressing, address); + setInstructionTable(0x48, (uintptr_t)&fPHA, eImplied); + //PHP(Addressing, address); + setInstructionTable(0x08, (uintptr_t)&fPHP, eImplied); + //PLA(Addressing, address); + setInstructionTable(0x68, (uintptr_t)&fPLA, eImplied); + //PLP(Addressing, address); + setInstructionTable(0x28, (uintptr_t)&fPLP, eImplied); + + // Subroutine Instructions + //JSR(Addressing, address); + setInstructionTable(0x20, (uintptr_t)&fJSR, eAbsolute); + //RTS(Addressing, address); + setInstructionTable(0x60, (uintptr_t)&fRTS, eImplied); + //RTI(Addressing, address); + setInstructionTable(0x40, (uintptr_t)&fRTI, eImplied); + + // Set/Reset Insutrctions + //CLC(Addressing, address); + setInstructionTable(0x18, (uintptr_t)&fCLC, eImplied); + //CLD(Addressing, address); + setInstructionTable(0xD8, (uintptr_t)&fCLD, eImplied); + //CLI(Addressing, address); + setInstructionTable(0x58, (uintptr_t)&fCLI, eImplied); + //CLV(Addressing, address); + setInstructionTable(0xB8, (uintptr_t)&fCLV, eImplied); + //SEC(Addressing, address); + setInstructionTable(0x38, (uintptr_t)&fSEC, eImplied); + //SED(Addressing, address); + setInstructionTable(0xF8, (uintptr_t)&fSED, eImplied); + //SEI(Addressing, address); + setInstructionTable(0x78, (uintptr_t)&fSEI, eImplied); + + // NOP/BRK Instructions + //NOP(Addressing, address); + setInstructionTable(0xEA, (uintptr_t)&fNOP, eImplied); + //BRK(Addressing, address); + setInstructionTable(0x00, (uintptr_t)&fBRK, eImplied); +} + + |