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44 lines
813 B
C++
44 lines
813 B
C++
#pragma once
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#include "stdafx.h"
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#include "MMC3.h"
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class MMC3_BmcF15 : public MMC3
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{
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private:
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uint8_t _exReg;
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protected:
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void InitMapper() override
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{
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AddRegisterRange(0x6000, 0xFFFF, MemoryOperation::Write);
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_exReg = 0;
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MMC3::InitMapper();
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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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void UpdatePrgMapping() override
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{
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uint32_t bank = _exReg & 0x0F;
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uint32_t mode = (_exReg & 0x08) >> 3;
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uint32_t mask = ~mode;
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SelectPrgPage2x(0, (bank & mask) << 1);
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SelectPrgPage2x(1, ((bank & mask) | mode) << 1);
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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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if(GetState().RegA001 & 0x80) {
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_exReg = value & 0x0F;
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UpdatePrgMapping();
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}
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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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}; |