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added mapper mbc1

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Lauchmelder 2021-10-31 02:02:31 +02:00
parent e4c68c8b17
commit e665f7a455
6 changed files with 240 additions and 2 deletions
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50
NES Emulator/mappers/mapper001.h Normal file
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#ifndef _MAPPER_001_
#define _MAPPER_001_
#include <stdio.h>
#include "../types.h"
#include "SDL.h"
struct Mapper001
{
Byte prg_rom_size;
Byte chr_rom_size;
Byte* prg_rom;
Byte* chr_rom;
///////////////////////////
/// REGISTERS ///
///////////////////////////
Byte shiftRegister;
union
{
struct
{
Byte mirroring : 2;
Byte prg_bank_mode : 2;
Byte chr_bank_mode : 1;
Byte padding : 3;
};
Byte raw;
} control;
Byte* lowerChrBank;
Byte* upperChrBank;
Byte* lowerPrgBank;
Byte* upperPrgBank;
};
struct Mapper001* createMapper001(Byte prg_rom_size, Byte chr_rom_size, FILE* fp);
void destroyMapper001(struct Mapper001* mapper);
Byte Mapper001_ReadCPU(void* mapper, Word address);
Byte Mapper001_ReadPPU(void* mapper, Word address);
void Mapper001_WriteCPU(void* mapper, Word address, Byte value);
void Mapper001_WritePPU(void* mapper, Word address, Byte value);
void Mapper001_GetPatternTableTexture(void* mapper, SDL_Texture* texture, int index);
#endif // _MAPPER_001_