mirror of https://github.com/JorjBauer/aiie.git
81 lines
1.1 KiB
C++
81 lines
1.1 KiB
C++
#ifndef __CPU_H
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#define __CPU_H
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#include <stdlib.h>
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#include <stdint.h>
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class MMU;
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// Flags (P) register bit definitions.
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// Negative
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#define F_N (1<<7)
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// Overflow
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#define F_V (1<<6)
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#define F_UNK (1<<5) // What the heck is this?
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// Break
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#define F_B (1<<4)
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// Decimal
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#define F_D (1<<3)
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// Interrupt Disable
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#define F_I (1<<2)
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// Zero
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#define F_Z (1<<1)
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// Carry
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#define F_C (1<<0)
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class Cpu {
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public:
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Cpu();
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~Cpu();
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bool Serialize(int8_t fh);
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bool Deserialize(int8_t fh);
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void Reset();
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void nmi();
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void rst();
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void brk();
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void irq();
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uint8_t Run(uint8_t numSteps);
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uint8_t step();
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uint8_t X();
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uint8_t Y();
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uint8_t A();
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uint16_t PC();
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uint8_t SP();
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uint8_t P();
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void stageIRQ();
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protected:
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// Stack manipulation
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void pushS8(uint8_t b);
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void pushS16(uint16_t w);
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uint8_t popS8();
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uint16_t popS16();
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public:
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void SetMMU(MMU *mmu) { this->mmu = mmu; }
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public:
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uint16_t pc;
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uint8_t sp;
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uint8_t a;
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uint8_t x;
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uint8_t y;
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uint8_t flags;
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uint32_t cycles;
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bool irqPending;
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MMU *mmu;
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};
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#endif
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