56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
//
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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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#define FRAME_RATE 60
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#define MASTER_CLOCK 21477272 // NTSC NES Master Clock (~21.47 MHz)
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#define MASTER_CYCLE_PER_FRAME (MASTER_CLOCK / FRAME_RATE)
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#define CPU_CLOCK_DIVISOR 12
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#define CPU_CYCLE_PER_FRAME (MASTER_CYCLE_PER_FRAME / CPU_CLOCK_DIVISOR)
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#define PPU_CLOCK_DIVISOR 4
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#define PPU_CYCLE_PER_CPU_CYCLE (CPU_CLOCK_DIVISOR / PPU_CLOCK_DIVISOR)
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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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typedef struct system {
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void *rom_header;
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Mapper mapper;
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unsigned long cycle_count;
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bool paused;
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bool ppu_paused;
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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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void system_init();
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void system_start();
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void system_next_frame();
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/**
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* Toggle pause for the system. If not paused, CPU and PPU cycles will be stopped until this method is called again.
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*/
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void system_toggle_pause(bool pause_ppu);
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/**
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* De-initialize the components of a system.
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*/
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void system_uninit();
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unsigned int system_get_cycles();
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Mapper *system_get_mapper();
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#endif //NESEMULATOR_SYSTEM_H
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