52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
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/*
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* =====================================================================================
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*
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* Filename: cpu.h
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*
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* Description: 6502 CPU emulator headers
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*
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* Version: 1.0
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* Created: 2023-09-21 10:12:33 PM
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* Revision: none
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* Compiler: gcc
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*
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* Author: William Nolin,
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* Organization:
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*
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* =====================================================================================
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*/
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#ifndef EMU_CPU_H
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#define EMU_CPU_H
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// Reference: https://www.nesdev.org/wiki/Status_flags
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#define CPU_STATUS_CARRY_MASK = 0x01;
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#define CPU_STATUS_ZERO_MASK = 0x02;
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#define CPU_STATUS_INTERRUPT_DISABLE_MASK = 0x04;
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#define CPU_STATUS_DECIMAL_MASK = 0x08;
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#define CPU_STATUS_B_MASK = 0x10;
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#define CPU_STATUS_I_MASK = 0x20;
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#define CPU_STATUS_OVERFLOW_MASK = 0x40;
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#define CPU_STATUS_NEGATIVE_MASK = 0x80;
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// Reference: https://www.nesdev.org/obelisk-6502-guide/registers.html
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typedef struct {
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unsigned short program_counter;
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unsigned char stack_pointer;
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unsigned char accumulator;
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unsigned char x;
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unsigned char y;
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unsigned char status;
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} cpu_registers_t;
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/**
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* @brief Set clock
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*/
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void cpu_step_to(int cycle);
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void cpu_add_cycles(int count);
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cpu_registers_t* cpu_get_registers();
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#endif
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