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// table.c
#include"table.h"
void* InstructionTable;
void (*func)(Addressing, address);
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){
val = 0; // TODO: Let the initial value of val be redundant for now so as to not break anything, but fix later
// Setup to call the correct function.
uintptr_t a = GetInstructionTableFunction(i);
memcpy(&func, a, sizeof(uintptr_t));
// Find the correct addressing mode.
Addressing* r = (InstructionTable + ((sizeof(uintptr_t)*256) + (sizeof(Addressing) * i)));
// Set val
if (fAddressGetLength(*r) > 0)
val += GetMemory(PC+1);
if (fAddressGetLength(*r) > 1)
val += GetMemory(PC+2) << 8;
// Set idata
idata = fAddress(*r, val);
// Perform function
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);
}
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