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31 lines
772 B
C++
31 lines
772 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class BmcCtc09 : 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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WriteRegister(0xC000, 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 >= 0xC000) {
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if (value & 0x10) {
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SelectPRGPage(0, ((value << 1) & 0x0E) | ((value >> 3) & 0x01));
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SelectPRGPage(1, ((value << 1) & 0x0E) | ((value >> 3) & 0x01));
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} else {
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SelectPrgPage2x(0, (value & 0x07) << 1);
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}
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SetMirroringType(((value & 0x40) == 0x40) ? MirroringType::Horizontal : MirroringType::Vertical);
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} else {
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SelectCHRPage(0, value & 0x0F);
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}
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}
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}; |