diff options
Diffstat (limited to 'instruction.h')
-rw-r--r-- | instruction.h | 118 |
1 files changed, 49 insertions, 69 deletions
diff --git a/instruction.h b/instruction.h index 2c4c3a2..c1b4843 100644 --- a/instruction.h +++ b/instruction.h @@ -1,4 +1,3 @@ - // array/map of pointers which all point // to the functions which the index corresponds to. // use that like a sort of map @@ -36,8 +35,7 @@ void fSTY(Addressing addr, address val){ idata = fAddress(addr, val); // Arithmetic Instructions -instruction_data fADC(Addressing addr, address val){ - instruction_data d; d.length = getLength(addr); +void fADC(Addressing addr, address val){ idata = fAddress(addr, val); int buffer = acc + fAddress(addr, val); setFlagV(buffer, acc); @@ -52,7 +50,7 @@ instruction_data fADC(Addressing addr, address val){ setFlagZ(acc); } -instruction_data fSBC(Addressing addr, address val){ +void fSBC(Addressing addr, address val){ idata = fAddress(addr, val); int buffer = acc - fAddress(addr, val); setFlagV(buffer, acc); @@ -68,37 +66,37 @@ instruction_data fSBC(Addressing addr, address val){ //Increment and Decrement Instructions -instruction_data fINC(Addressing addr, address val){ +void fINC(Addressing addr, address val){ idata = fAddress(addr, val); Memory[x]++; setFlagD(Memory[x]); setFlagZ(Memory[x]); } -instruction_data fINX(){ +void fINX(Addressing addr, address val){ idata = fAddress(addr, val); X++; setFlagD(X); setFlagZ(X); } -instruction_data fINY(){ +void fINY(Addressing addr, address val){ idata = fAddress(addr, val); Y++; setFlagD(Y); setFlagZ(Y); } -instruction_data fDEC(Addressing addr, address val){ +void fDEC(Addressing addr, address val){ idata = fAddress(addr, val); Memory[x]--; setFlagD(Memory[x]); setFlagZ(Memory[x]); } -instruction_data fDEX(){ +void fDEX(Addressing addr, address val){ idata = fAddress(addr, val); X--; setFlagD(X); setFlagZ(X); } -instruction_data fDEY(){ +void fDEY(Addressing addr, address val){ idata = fAddress(addr, val); Y--; setFlagD(Y); setFlagZ(Y); @@ -106,19 +104,19 @@ instruction_data fDEY(){ // Logical Instructions -instruction_data fAND(Addressing addr, address val){ +void fAND(Addressing addr, address val){ idata = fAddress(addr, val); acc = acc & fAddress(addr, val); setFlagN(); setFlagZ(acc); } -instruction_data fORA(Addressing addr, address val){ +void fORA(Addressing addr, address val){ idata = fAddress(addr, val); acc = acc | fAddress(addr, val); setFlagN(); setFlagZ(acc); } -instruction_data fEOR(Addressing addr, address val){ +void fEOR(Addressing addr, address val){ idata = fAddress(addr, val); acc = acc ^ fAddress(addr, val); setFlagN(acc); setFlagZ(acc); @@ -126,43 +124,44 @@ instruction_data fEOR(Addressing addr, address val){ // Jump, Branch, Compare, and Test Bits -instruction_data fJMP(address val){ +void fJMP(Addressing addr, address val){ idata = fAddress(addr, val); PC = val; } -instruction_data fBCC(signed char val){ +void fBCC(Addressing addr, address val){ idata = fAddress(addr, val); + //signed char val down to BVC if (getFlag(flag_C) == 0) PC += val; } -instruction_data fBCS(signed char val){ +void fBCS(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_C) == 1) PC += val; } -instruction_data fBEQ(signed char val){ +void fBEQ(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_Z) == 1) PC += val; } -instruction_data fBNE(signed char val){ +void fBNE(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_Z) == 0) PC += val; } -instruction_data fBMI(signed char val){ +void fBMI(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_N) == 1) PC += val; } -instruction_data fBPL(signed char val){ +void fBPL(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_N) == 0) PC += val; } -instruction_data fBVS(signed char val){ +void fBVS(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_V) == 1) PC += val; } -instruction_data fBVC(signed char val){ +void fBVC(Addressing addr, address val){ idata = fAddress(addr, val); if (getFlag(flag_V) == 0) PC += val; } -instruction_data fCMP(address val){ +void fCMP(Addressing addr, address val){ idata = fAddress(addr, val); if (acc < Memory[val]){ flagSet(flag_N); flagClear(flag_Z); flagClear(flag_C); }if (acc == Memory[val]){ @@ -172,7 +171,7 @@ instruction_data fCMP(address val){ } } -instruction_data fCPX(address val){ +void fCPX(Addressing addr, address val){ idata = fAddress(addr, val); if (X < Memory[val]){ flagSet(flag_N); flagClear(flag_Z); flagClear(flag_C); }if (X == Memory[val]){ @@ -182,7 +181,7 @@ instruction_data fCPX(address val){ } } -instruction_data fCPY(address val){ +void fCPY(Addressing addr, address val){ idata = fAddress(addr, val); if (Y < Memory[val]){ flagSet(flag_N); flagClear(flag_Z); flagClear(flag_C); }if (Y == Memory[val]){ @@ -192,7 +191,7 @@ instruction_data fCPY(address val){ } } -instruction_data fBIT(address val){ +void fBIT(Addressing addr, address val){ idata = fAddress(addr, val); setFlag(flag_N, (Memory[val] & flag_N)); setFlag(flag_V, (Memory[val] & flag_V)); if (((Memory[val] & flag_N) & (Memory[val] & flag_V)) == 0) { @@ -204,21 +203,21 @@ instruction_data fBIT(address val){ // Shift and Rotate Instructions -instruction_data fASL(Addressing addr, address val){ +void fASL(Addressing addr, address val){ idata = fAddress(addr, val); setFlag(flag_C, (val & 0x80)); acc = (val << 1); setFlagN(acc); setFlagZ(acc); } -instruction_data fASL(Addressing addr, address val){ +void fASL(Addressing addr, address val){ idata = fAddress(addr, val); setFlag(flag_C, (val & 0x01)); acc = (val >> 1); setFlagN(acc); setFlagZ(acc); } -instruction_data fROL(Addressing addr, address val){ +void fROL(Addressing addr, address val){ idata = fAddress(addr, val); setFlag(flag_C, (val & 0x80)); acc = (val << 1); acc |= (getFlag(flag_C) * 0x01); @@ -226,7 +225,7 @@ instruction_data fROL(Addressing addr, address val){ setFlagZ(acc); } -instruction_data fROR(Addressing addr, address val){ +void fROR(Addressing addr, address val){ idata = fAddress(addr, val); setFlag(flag_C, (val & 0x01)); acc = (val >> 1); acc |= (getFlag(flag_C) * 0x80); @@ -236,25 +235,25 @@ instruction_data fROR(Addressing addr, address val){ // Transfer Instructions -instruction_data fTAX(){ +void fTAX(Addressing addr, address val){ idata = fAddress(addr, val); X = acc; setFlagN(X); setFlagZ(X); } -instruction_data fTAY(){ +void fTAY(Addressing addr, address val){ idata = fAddress(addr, val); Y = acc; setFlagN(Y); setFlagZ(Y); } -instruction_data fTXA(){ +void fTXA(Addressing addr, address val){ idata = fAddress(addr, val); acc = X; setFlagN(acc); setFlagZ(acc); } -instruction_data fTYA(){ +void fTYA(Addressing addr, address val){ idata = fAddress(addr, val); acc = Y; setFlagN(acc); setFlagZ(acc); @@ -262,27 +261,27 @@ instruction_data fTYA(){ // Stack Instructions -instruction_data fTSX(){ +void fTSX(Addressing addr, address val){ idata = fAddress(addr, val); X = S; } -instruction_data fTXS(){ +void fTXS(Addressing addr, address val){ idata = fAddress(addr, val); S = X; } -instruction_data fPHA(){ +void fPHA(Addressing addr, address val){ idata = fAddress(addr, val); } -instruction_data fPHP(){ +void fPHP(Addressing addr, address val){ idata = fAddress(addr, val); } -instruction_data fPLA(){ +void fPLA(Addressing addr, address val){ idata = fAddress(addr, val); } -instruction_data fPLP(){ +void fPLP(Addressing addr, address val){ idata = fAddress(addr, val); } @@ -292,67 +291,48 @@ instruction_data fPLP(){ // Set/Reset Insutrctions -instruction_data fCLC(){ +void fCLC(Addressing addr, address val){ idata = fAddress(addr, val); flagClear(flag_C); return {1, 2}; } -instruction_data fCLD(){ +void fCLD(Addressing addr, address val){ idata = fAddress(addr, val); flagClear(flag_D); return {1, 2}; } -instruction_data fCLI(){ +void fCLI(Addressing addr, address val){ idata = fAddress(addr, val); flagClear(flag_I); return {1, 2}; } -instruction_data fCLV(){ +void fCLV(Addressing addr, address val){ idata = fAddress(addr, val); flagClear(flag_V); return {1, 2}; } -instruction_data fSEC(){ +void fSEC(Addressing addr, address val){ idata = fAddress(addr, val); flagSet(flag_C); return {1, 2}; } -instruction_data fSED(){ +void fSED(Addressing addr, address val){ idata = fAddress(addr, val); flagSet(flag_D); return {1, 2}; } -instruction_data fSEI(){ +void fSEI(Addressing addr, address val){ idata = fAddress(addr, val); flagSet(flag_I); return {1, 2}; } // NOP/BRK Instructions -instruction_data fNOP(){ +void fNOP(Addressing addr, address val){ idata = fAddress(addr, val); return {1, 2}; } -instruction_data fBRK(){ +void fBRK(Addressing addr, address val){ idata = fAddress(addr, val); flagSet(flag_B); return {1, 7}; -} - - - - - - - - - - -/* -void runInstruction(int code, int val){ - switch(code){ - - } - -} - -*/
\ No newline at end of file +}
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