38 lines
816 B
C
38 lines
816 B
C
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#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class BmcG146 : 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)
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{
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BaseMapper::Reset(softReset);
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WriteRegister(0x8000, 0);
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SelectCHRPage(0, 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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if(addr & 0x800) {
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SelectPRGPage(0, (addr & 0x1F) | (addr & ((addr & 0x40) >> 6)));
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SelectPRGPage(1, (addr & 0x18) | 0x07);
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} else {
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if(addr & 0x40) {
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SelectPRGPage(0, addr & 0x1F);
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SelectPRGPage(1, addr & 0x1F);
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} else {
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SelectPrgPage2x(0, addr & 0x1E);
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}
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}
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SetMirroringType(addr & 0x80 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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};
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