mirror of
https://github.com/libretro/Mesen.git
synced 2024-12-14 12:58:56 +00:00
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
#pragma once
|
|
#include "stdafx.h"
|
|
#include "BaseMapper.h"
|
|
|
|
class Kaiser7057 : public BaseMapper
|
|
{
|
|
private:
|
|
uint8_t _regs[8];
|
|
|
|
protected:
|
|
uint16_t GetPRGPageSize() override { return 0x800; }
|
|
uint16_t GetCHRPageSize() override { return 0x2000; }
|
|
|
|
void InitMapper() override
|
|
{
|
|
memset(_regs, 0, sizeof(_regs));
|
|
SelectCHRPage(0, 0);
|
|
UpdateState();
|
|
}
|
|
|
|
void StreamState(bool saving) override
|
|
{
|
|
BaseMapper::StreamState(saving);
|
|
ArrayInfo<uint8_t> regs{ _regs, 8 };
|
|
Stream(regs);
|
|
|
|
if(!saving) {
|
|
UpdateState();
|
|
}
|
|
}
|
|
|
|
void UpdateState()
|
|
{
|
|
for(int i = 0; i < 4; i++) {
|
|
SetCpuMemoryMapping(0x6000 + 0x800 * i, 0x67FF + 0x800 * i, _regs[4 + i], PrgMemoryType::PrgRom);
|
|
SelectPRGPage(i, _regs[i]);
|
|
}
|
|
SelectPrgPage4x(1, 0x34);
|
|
SelectPrgPage4x(2, 0x38);
|
|
SelectPrgPage4x(3, 0x3C);
|
|
}
|
|
|
|
void UpdatePrgReg(int index, uint8_t value, bool low)
|
|
{
|
|
if(low) {
|
|
_regs[index] = (_regs[index] & 0xF0) | (value & 0x0F);
|
|
} else {
|
|
_regs[index] = (_regs[index] & 0x0F) | ((value << 4) & 0xF0);
|
|
}
|
|
UpdateState();
|
|
}
|
|
|
|
void WriteRegister(uint16_t addr, uint8_t value) override
|
|
{
|
|
bool low = (addr & 0x01) == 0x00;
|
|
switch(addr & 0xF002) {
|
|
case 0x8000: case 0x8002: case 0x9000: case 0x9002:
|
|
SetMirroringType(value & 0x01 ? MirroringType::Vertical : MirroringType::Horizontal);
|
|
break;
|
|
|
|
case 0xB000: UpdatePrgReg(0, value, low); break;
|
|
case 0xB002: UpdatePrgReg(1, value, low); break;
|
|
case 0xC000: UpdatePrgReg(2, value, low); break;
|
|
case 0xC002: UpdatePrgReg(3, value, low); break;
|
|
case 0xD000: UpdatePrgReg(4, value, low); break;
|
|
case 0xD002: UpdatePrgReg(5, value, low); break;
|
|
case 0xE000: UpdatePrgReg(6, value, low); break;
|
|
case 0xE002: UpdatePrgReg(7, value, low); break;
|
|
}
|
|
}
|
|
}; |