67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
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//
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// Created by william on 12/23/23.
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//
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#include "types.h"
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#include "mapper.h"
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#include "ppu.h"
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#ifndef NESEMULATOR_SYSTEM_H
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#define NESEMULATOR_SYSTEM_H
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// NTSC NES Master Clock (~21.47 MHz)
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#define MASTER_CLOCK 21477272
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#define CPU_CLOCK_DIVISOR 12
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#define PPU_CLOCK_DIVISOR 4
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#define FRAME_RATE 60
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#define PPU_REGISTERS_BASE_ADDR 0x2000
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#define PPU_REGISTER_OAM_DMA_ADDR 0x4014
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#define APU_REGISTERS_COUNT 24
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// Reference: https://www.nesdev.org/obelisk-6502-guide/registers.html
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typedef struct cpu {
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address program_counter;
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byte stack_pointer;
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byte accumulator;
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byte x;
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byte y;
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byte status;
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bool oam_dma_triggered;
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} CPU;
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typedef struct system {
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void *rom_header;
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CPU cpu;
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PPU ppu;
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Mapper mapper;
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ram ram;
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byte apu_registers[APU_REGISTERS_COUNT];
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unsigned long cycle_count;
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} System;
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/**
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* Initialize all components of a system.
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*
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* @param system The system to initialize
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*/
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void system_init(System *system);
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void system_start(System *system);
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/**
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* Starts the main loop of a system.
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*
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* @param system The system
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*/
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void system_loop(System *system);
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/**
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* De-initialize the components of a system.
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*
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* @param system The system to de-initialize
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*/
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void system_uninit(System *system);
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#endif //NESEMULATOR_SYSTEM_H
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