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25 lines
No EOL
660 B
C++
25 lines
No EOL
660 B
C++
#pragma once
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#include "pch.h"
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#include "NES/BaseMapper.h"
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class Mapper204 : public BaseMapper
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{
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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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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 bitMask = addr & 0x06;
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uint8_t page = bitMask + ((bitMask == 0x06) ? 0 : (addr & 0x01));
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SelectPrgPage(0, page);
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SelectPrgPage(1, bitMask + ((bitMask == 0x06) ? 1 : (addr & 0x01)));
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SelectChrPage(0, page);
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SetMirroringType(addr & 0x10 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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}; |