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https://github.com/SourMesen/Mesen2.git
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43 lines
949 B
C++
43 lines
949 B
C++
#pragma once
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#include "pch.h"
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#include "NES/BaseMapper.h"
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class Mapper62 : 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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SelectPrgPage(0, 0);
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SelectPrgPage(1, 1);
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SelectChrPage(0, 0);
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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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SelectPrgPage(0, 0);
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SelectPrgPage(1, 1);
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SelectChrPage(0, 0);
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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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uint8_t prgPage = ((addr & 0x3F00) >> 8) | (addr & 0x40);
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uint8_t chrPage = ((addr & 0x1F) << 2) | (value & 0x03);
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if(addr & 0x20) {
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SelectPrgPage(0, prgPage);
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SelectPrgPage(1, prgPage);
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} else {
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SelectPrgPage(0, prgPage & 0xFE);
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SelectPrgPage(1, (prgPage & 0xFE) + 1);
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}
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SelectChrPage(0, chrPage);
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SetMirroringType(addr & 0x80 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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};
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