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31 lines
725 B
C++
31 lines
725 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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//NTDec 5-in-1 cart - untested, based on Wiki description
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class Mapper174 : public BaseMapper
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{
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protected:
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virtual uint16_t GetPRGPageSize() override { return 0x4000; }
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virtual uint16_t GetCHRPageSize() override { return 0x2000; }
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void InitMapper() override
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{
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WriteRegister(0x8000, 0);
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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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uint8_t prgBank = (addr >> 4) & 0x07;
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if(addr & 0x80) {
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SelectPrgPage2x(0, prgBank & 0xFE);
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} else {
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SelectPRGPage(0, prgBank);
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SelectPRGPage(1, prgBank);
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}
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SelectCHRPage(0, (addr >> 1) & 0x07);
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SetMirroringType(addr & 0x01 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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};
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