55 lines
718 B
C++
55 lines
718 B
C++
#include "nes_mapper.h"
|
|
|
|
|
|
|
|
// Mapper 87
|
|
void MAP87_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 MAP87_MemoryWrite(uint16 addr, uint8 data)
|
|
{
|
|
if(addr == 0x6000)
|
|
{
|
|
uint8 chr_bank = (data & 0x02) >> 1;
|
|
|
|
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 MAP87_Init()
|
|
{
|
|
NES_Mapper->Reset = MAP87_Reset;
|
|
NES_Mapper->Write = MAP87_MemoryWrite;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|