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40 lines
913 B
C++
40 lines
913 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class Mapper212 : public BaseMapper
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{
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protected:
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virtual uint16_t GetPRGPageSize() override { return 0x4000; }
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virtual uint16_t GetCHRPageSize() override { return 0x2000; }
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virtual bool AllowRegisterRead() override { return true; }
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void InitMapper() override
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{
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AddRegisterRange(0x6000, 0x7FFF, MemoryOperation::Read);
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WriteRegister(0x8000, 0);
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}
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uint8_t ReadRegister(uint16_t addr) override
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{
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uint8_t value = InternalReadRam(addr);
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if((addr & 0xE010) == 0x6000) {
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value |= 0x80;
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}
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return value;
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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 & 0x4000) {
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SelectPrgPage2x(0, addr & 0x06);
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} else {
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SelectPRGPage(0, addr & 0x07);
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SelectPRGPage(1, addr & 0x07);
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}
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SelectCHRPage(0, addr & 0x07);
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SetMirroringType(addr & 0x08 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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}; |