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player/Project/Src/NES/mapper/099.cpp
2025-06-27 00:32:57 +08:00

67 lines
715 B
C++

#include "nes_mapper.h"
// Mapper 99
void MAP99_Reset()
{
// // set CPU bank pointers
// if(num_8k_ROM_banks > 2)
// {
// set_CPU_banks(0,1,2,3);
// }
// else if(num_8k_ROM_banks > 1)
// {
// set_CPU_banks(0,1,0,1);
// }
// else
// {
// set_CPU_banks(0,0,0,0);
// }
// set VROM bank
if(num_1k_VROM_banks)
{
set_PPU_banks(0,1,2,3,4,5,6,7);
}
}
void MAP99_WriteHighRegs(uint16 addr, uint8 data)
{
if(addr == 0x4016)
{
if(data & 0x04)
{
set_PPU_banks(8,9,10,11,12,13,14,15);
}
else
{
set_PPU_banks(0,1,2,3,4,5,6,7);
}
}
}
void MAP99_Init()
{
NES_Mapper->Reset = MAP99_Reset;
NES_Mapper->WriteLow=MAP99_WriteHighRegs;
}