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41 lines
779 B
C++
41 lines
779 B
C++
#pragma once
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#include "stdafx.h"
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#include "MMC3.h"
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class MMC3_238 : public MMC3
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{
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private:
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const uint8_t _securityLut[4] = { 0x00, 0x02, 0x02, 0x03 };
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uint8_t _exReg;
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protected:
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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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MMC3::InitMapper();
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_exReg = 0;
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AddRegisterRange(0x4020, 0x7FFF, MemoryOperation::Any);
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RemoveRegisterRange(0x8000, 0xFFFF, MemoryOperation::Read);
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}
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void StreamState(bool saving) override
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{
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MMC3::StreamState(saving);
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Stream(_exReg);
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}
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uint8_t ReadRegister(uint16_t addr) override
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{
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return _exReg;
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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 < 0x8000) {
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_exReg = _securityLut[value & 0x03];
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} else {
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MMC3::WriteRegister(addr, value);
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}
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}
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}; |