mirror of
https://github.com/libretro/Mesen.git
synced 2024-11-30 12:30:52 +00:00
58 lines
1.2 KiB
C
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() { return 0x4000; }
|
||
|
virtual uint16_t GetCHRPageSize() { return 0x2000; }
|
||
|
|
||
|
void InitMapper()
|
||
|
{
|
||
|
SelectCHRPage(0, 0);
|
||
|
Reset(true);
|
||
|
}
|
||
|
|
||
|
virtual void StreamState(bool saving)
|
||
|
{
|
||
|
BaseMapper::StreamState(saving);
|
||
|
Stream<bool>(_contraMode);
|
||
|
}
|
||
|
|
||
|
virtual void Reset(bool softReset)
|
||
|
{
|
||
|
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)
|
||
|
{
|
||
|
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);
|
||
|
}
|
||
|
}
|
||
|
};
|