aiie/cpu.h

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#ifndef __CPU_H
#define __CPU_H
#include <stdlib.h>
#include <stdint.h>
class MMU;
enum addrmode {
A_ILLEGAL,
A_IMM,
A_ABS,
A_ZER,
A_IMP,
A_ACC,
A_REL,
A_ABI,
A_ZEX,
A_ZEY,
A_ZIND,
A_ABX,
A_ABXI,
A_ABY,
A_INX,
A_INY,
A_ZPREL
};
enum optype {
O_ILLEGAL,
O_ADC,
O_AND,
O_ASL,
O_ASL_ACC,
O_BCC,
O_BCS,
O_BEQ,
O_BIT,
O_BMI,
O_BNE,
O_BPL,
O_BRA,
O_BRK,
O_BVC,
O_BVS,
O_CLC,
O_CLD,
O_CLI,
O_CLV,
O_CMP,
O_CPX,
O_CPY,
O_DEC,
O_DEC_ACC,
O_DEX,
O_DEY,
O_EOR,
O_INC,
O_INC_ACC,
O_INX,
O_INY,
O_JMP,
O_JSR,
O_LDA,
O_LDX,
O_LDY,
O_LSR,
O_LSR_ACC,
O_NOP,
O_ORA,
O_PHA,
O_PHP,
O_PHX,
O_PHY,
O_PLA,
O_PLP,
O_PLX,
O_PLY,
O_ROL,
O_ROL_ACC,
O_ROR,
O_ROR_ACC,
O_RTI,
O_RTS,
O_SBC,
O_SEC,
O_SED,
O_SEI,
O_STA,
O_STX,
O_STY,
O_STZ,
O_TAX,
O_TAY,
O_TRB,
O_TSB,
O_TSX,
O_TXA,
O_TXS,
O_TYA,
O_BBR,
O_BBS,
O_RMB,
O_SMB,
O_WAI,
// and the "illegal" opcodes (those that don't officially exist for
// the 65c02, but have repeatable results)
O_DCP
};
typedef struct {
optype op;
addrmode mode;
uint8_t cycles;
} optype_t;
extern optype_t opcodes[256];
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// Flags (P) register bit definitions.
// Negative
#define F_N (1<<7)
// Overflow
#define F_V (1<<6)
#define F_UNK (1<<5) // What the heck is this?
// Break
#define F_B (1<<4)
// Decimal
#define F_D (1<<3)
// Interrupt Disable
#define F_I (1<<2)
// Zero
#define F_Z (1<<1)
// Carry
#define F_C (1<<0)
class Cpu {
public:
Cpu();
~Cpu();
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bool Serialize(int8_t fh);
bool Deserialize(int8_t fh);
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void Reset();
void nmi();
void rst();
void brk();
void irq();
uint8_t Run(uint8_t numSteps);
uint8_t step();
uint8_t X();
uint8_t Y();
uint8_t A();
uint16_t PC();
uint8_t SP();
uint8_t P();
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void stageIRQ();
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protected:
// Stack manipulation
void pushS8(uint8_t b);
void pushS16(uint16_t w);
uint8_t popS8();
uint16_t popS16();
public:
void SetMMU(MMU *mmu) { this->mmu = mmu; }
void realtime();
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public:
uint16_t pc;
uint8_t sp;
uint8_t a;
uint8_t x;
uint8_t y;
uint8_t flags;
uint32_t cycles;
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bool irqPending;
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MMU *mmu;
bool realtimeProcessing;
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};
#endif