46 lines
897 B
C
46 lines
897 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 Unl43272 : public BaseMapper
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{
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private:
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uint16_t _lastAddr;
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protected:
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uint16_t GetPRGPageSize() override { return 0x8000; }
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uint16_t GetCHRPageSize() override { return 0x2000; }
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bool AllowRegisterRead() override { return true; }
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void InitMapper() override
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{
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SelectCHRPage(0, 0);
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SetMirroringType(MirroringType::Horizontal);
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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(0x8081, 0);
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}
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void StreamState(bool saving) override
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{
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BaseMapper::StreamState(saving);
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Stream(_lastAddr);
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}
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uint8_t ReadRegister(uint16_t addr) override
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{
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return InternalReadRam(_lastAddr & 0x400 ? (addr & 0xFE) : addr);
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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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_lastAddr = addr;
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if((addr & 0x81) == 0x81) {
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SelectPRGPage(0, (addr & 0x38) >> 3);
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}
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}
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};
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