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https://github.com/SourMesen/Mesen2.git
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57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
#pragma once
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#include "pch.h"
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#include "NES/BaseMapper.h"
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class Mapper230 : public BaseMapper
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{
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private:
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bool _contraMode = false;
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protected:
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uint16_t GetPrgPageSize() override { return 0x4000; }
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uint16_t GetChrPageSize() override { return 0x2000; }
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void InitMapper() override
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{
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SelectChrPage(0, 0);
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Reset(true);
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}
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virtual void Serialize(Serializer& s) override
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{
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BaseMapper::Serialize(s);
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SV(_contraMode);
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}
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virtual void Reset(bool softReset) override
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{
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if(softReset) {
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_contraMode = !_contraMode;
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if(_contraMode) {
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SelectPrgPage(0, 0);
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SelectPrgPage(1, 7);
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SetMirroringType(MirroringType::Vertical);
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} else {
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SelectPrgPage(0, 8);
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SelectPrgPage(1, 9);
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SetMirroringType(MirroringType::Horizontal);
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}
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}
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}
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void WriteRegister(uint16_t addr, uint8_t value) override
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{
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if(_contraMode) {
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SelectPrgPage(0, value & 0x07);
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} else {
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if(value & 0x20) {
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SelectPrgPage(0, (value & 0x1F) + 8);
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SelectPrgPage(1, (value & 0x1F) + 8);
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} else {
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SelectPrgPage(0, (value & 0x1E) + 8);
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SelectPrgPage(1, (value & 0x1E) + 9);
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}
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SetMirroringType(value & 0x40 ? MirroringType::Vertical : MirroringType::Horizontal);
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}
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}
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};
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