51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
|
|
/////////////////////////////////////////////////////////////////////
|
|
// Mapper 229
|
|
void NES_mapper229::Reset()
|
|
{
|
|
// set CPU bank pointers
|
|
set_CPU_banks(0,1,2,3);
|
|
|
|
// set PPU bank pointers
|
|
set_PPU_banks(0,1,2,3,4,5,6,7);
|
|
}
|
|
|
|
void NES_mapper229::MemoryWrite(uint32 addr, uint8 data)
|
|
{
|
|
addr &= 0x0FFF;
|
|
|
|
if(addr & 0x0020)
|
|
{
|
|
set_mirroring(NES_PPU::MIRROR_HORIZ);
|
|
}
|
|
else
|
|
{
|
|
set_mirroring(NES_PPU::MIRROR_VERT);
|
|
}
|
|
|
|
if(addr & 0x001E)
|
|
{
|
|
uint8 prg_bank = (uint8)(addr & 0x001F);
|
|
uint32 chr_bank = addr & 0x0FFF;
|
|
set_CPU_bank4(prg_bank*2+0);
|
|
set_CPU_bank5(prg_bank*2+1);
|
|
set_CPU_bank6(prg_bank*2+0);
|
|
set_CPU_bank7(prg_bank*2+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);
|
|
}
|
|
else
|
|
{
|
|
set_CPU_banks(0,1,2,3);
|
|
set_PPU_banks(0,1,2,3,4,5,6,7);
|
|
}
|
|
}
|
|
/////////////////////////////////////////////////////////////////////
|
|
|