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Implement SBC Instructions

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Palindromic Bread Loaf
2025-07-24 09:05:13 -04:00
parent afb90fee06
commit e6622191d3
2 changed files with 460 additions and 0 deletions
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22
src/cpu.h
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@@ -84,6 +84,12 @@ class CPU {
uint8_t ROR8(uint8_t value);
uint16_t ROR16(uint16_t value);
// Helper methods for SBC operations
void SBC8(uint8_t operand);
void SBC16(uint16_t operand);
uint8_t SBC8_Decimal(uint8_t a, uint8_t operand, bool carry);
uint16_t SBC16_Decimal(uint16_t a, uint16_t operand, bool carry);
public:
explicit CPU(Bus* memory_bus) : bus(memory_bus) {
Reset();
@@ -333,6 +339,22 @@ public:
void PER();
void REP();
void RTI();
void SBC_Immediate();
void SBC_Absolute();
void SBC_AbsoluteLong();
void SBC_AbsoluteX();
void SBC_AbsoluteLongX();
void SBC_AbsoluteY();
void SBC_DirectPage();
void SBC_DirectPageX();
void SBC_DirectPageIndirect();
void SBC_DirectPageIndirectLong();
void SBC_DirectPageIndirectY();
void SBC_DirectPageIndirectLongY();
void SBC_DirectPageIndirectX();
void SBC_StackRelative();
void SBC_StackRelativeIndirectY();
};
#endif //CPU_H