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49 lines
1 KiB
C++
49 lines
1 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "MMC3.h"
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class MMC3_44 : public MMC3
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{
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private:
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uint8_t _selectedBlock = 0;
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protected:
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virtual void StreamState(bool saving) override
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{
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MMC3::StreamState(saving);
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Stream(_selectedBlock);
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}
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virtual void Reset(bool softReset) override
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{
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_selectedBlock = 0;
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UpdateState();
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}
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virtual void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
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{
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page &= _selectedBlock <= 5 ? 0x7F : 0xFF;
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page |= _selectedBlock * 0x80;
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MMC3::SelectCHRPage(slot, page, memoryType);
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}
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virtual void SelectPRGPage(uint16_t slot, uint16_t page, PrgMemoryType memoryType = PrgMemoryType::PrgRom) override
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{
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page &= _selectedBlock <= 5 ? 0x0F : 0x1F;
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page |= _selectedBlock * 0x10;
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MMC3::SelectPRGPage(slot, page, memoryType);
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}
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virtual void WriteRegister(uint16_t addr, uint8_t value) override
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{
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if((addr & 0xE001) == 0xA001) {
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_selectedBlock = value & 0x07;
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if(_selectedBlock == 7) {
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_selectedBlock = 6;
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}
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}
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MMC3::WriteRegister(addr, value);
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}
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}; |