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42 lines
871 B
C++
42 lines
871 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class Mapper202 : public BaseMapper
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{
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private:
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bool _prgMode1;
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protected:
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virtual uint16_t GetPRGPageSize() { return 0x4000; }
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virtual uint16_t GetCHRPageSize() { return 0x2000; }
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void InitMapper()
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{
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SelectPRGPage(0, 0);
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SelectPRGPage(1, 0);
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SelectCHRPage(0, 0);
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}
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virtual void StreamState(bool saving)
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{
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BaseMapper::StreamState(saving);
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Stream(_prgMode1);
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}
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void WriteRegister(uint16_t addr, uint8_t value)
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{
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_prgMode1 = (addr & 0x09) == 0x09;
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SelectCHRPage(0, (addr >> 1) & 0x07);
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if(_prgMode1) {
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SelectPRGPage(0, (addr >> 1) & 0x07);
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SelectPRGPage(1, ((addr >> 1) & 0x07) + 1);
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} else {
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SelectPRGPage(0, (addr >> 1) & 0x07);
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SelectPRGPage(1, (addr >> 1) & 0x07);
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}
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SetMirroringType(addr & 0x01 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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}; |