Files
player/Project/Src/NES/mapper/079.cpp
2025-06-27 00:32:57 +08:00

53 lines
880 B
C++

#include "nes_mapper.h"
// Mapper 79
void MAP79_Reset()
{
// set CPU bank pointers
// set_CPU_banks(0,1,2,3);
// set PPU bank pointers
if(num_1k_VROM_banks)
{
set_PPU_banks(0,1,2,3,4,5,6,7);
}
}
void MAP79_MemoryWriteLow(uint16 addr, uint8 data)
{
if(addr & 0x0100)
{
uint8 prg_bank = (data & 0x08) >> 3;
uint8 chr_bank = data & 0x07;
set_CPU_bank4(prg_bank*4+0);
set_CPU_bank5(prg_bank*4+1);
set_CPU_bank6(prg_bank*4+2);
set_CPU_bank7(prg_bank*4+3);
set_PPU_bank0(chr_bank*8+0);
set_PPU_bank1(chr_bank*8+1);
set_PPU_bank2(chr_bank*8+2);
set_PPU_bank3(chr_bank*8+3);
set_PPU_bank4(chr_bank*8+4);
set_PPU_bank5(chr_bank*8+5);
set_PPU_bank6(chr_bank*8+6);
set_PPU_bank7(chr_bank*8+7);
}
}
void MAP79_Init()
{
NES_Mapper->Reset = MAP79_Reset;
NES_Mapper->WriteLow=MAP79_MemoryWriteLow;
}