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35 lines
793 B
C++
35 lines
793 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class BmcNtd03 : 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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}
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void Reset(bool softReset) override
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{
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BaseMapper::Reset(softReset);
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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 prg = ((addr >> 10) & 0x1E);
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uint8_t chr= ((addr & 0x0300) >> 5) | (addr & 0x07);
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if(addr & 0x80) {
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SelectPRGPage(0, prg | ((addr >> 6) & 1));
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SelectPRGPage(1, prg | ((addr >> 6) & 1));
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} else {
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SelectPrgPage2x(0, prg & 0xFE);
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}
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SelectCHRPage(0, chr);
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SetMirroringType(addr & 0x400 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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}; |