Mesen/Core/Mapper230.h
2016-12-17 23:14:47 -05:00

58 lines
1.2 KiB
C++

#pragma once
#include "stdafx.h"
#include "BaseMapper.h"
class Mapper230 : public BaseMapper
{
private:
bool _contraMode = false;
protected:
virtual uint16_t GetPRGPageSize() override { return 0x4000; }
virtual uint16_t GetCHRPageSize() override { return 0x2000; }
void InitMapper() override
{
SelectCHRPage(0, 0);
Reset(true);
}
virtual void StreamState(bool saving) override
{
BaseMapper::StreamState(saving);
Stream(_contraMode);
}
virtual void Reset(bool softReset) override
{
if(softReset) {
_contraMode = !_contraMode;
if(_contraMode) {
SelectPRGPage(0, 0);
SelectPRGPage(1, 7);
SetMirroringType(MirroringType::Vertical);
} else {
SelectPRGPage(0, 8);
SelectPRGPage(1, 9);
SetMirroringType(MirroringType::Horizontal);
}
}
}
void WriteRegister(uint16_t addr, uint8_t value) override
{
if(_contraMode) {
SelectPRGPage(0, value & 0x07);
} else {
if(value & 0x20) {
SelectPRGPage(0, (value & 0x1F) + 8);
SelectPRGPage(1, (value & 0x1F) + 8);
} else {
SelectPRGPage(0, (value & 0x1E) + 8);
SelectPRGPage(1, (value & 0x1E) + 9);
}
SetMirroringType(value & 0x40 ? MirroringType::Vertical : MirroringType::Horizontal);
}
}
};