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42 lines
No EOL
983 B
C++
42 lines
No EOL
983 B
C++
#pragma once
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#include "pch.h"
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#include "NES/Mappers/Nintendo/MMC3.h"
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class MMC3_245 : public MMC3
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{
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protected:
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void UpdateState() override
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{
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MMC3::UpdateState();
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if(HasChrRam()) {
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if(_chrMode) {
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SelectChrPage4x(0, 4);
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SelectChrPage4x(1, 0);
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} else {
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SelectChrPage4x(0, 0);
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SelectChrPage4x(1, 4);
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}
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}
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}
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void UpdatePrgMapping() override
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{
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uint8_t orValue = _registers[0] & 0x02 ? 0x40 : 0x00;
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_registers[6] = (_registers[6] & 0x3F) | orValue;
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_registers[7] = (_registers[7] & 0x3F) | orValue;
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uint16_t lastPageInBlock = (GetPrgPageCount() >= 0x40 ? (0x3F | orValue) : -1);
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if(_prgMode == 0) {
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SelectPrgPage(0, _registers[6]);
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SelectPrgPage(1, _registers[7]);
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SelectPrgPage(2, lastPageInBlock - 1);
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SelectPrgPage(3, lastPageInBlock);
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} else if(_prgMode == 1) {
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SelectPrgPage(0, lastPageInBlock - 1);
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SelectPrgPage(1, _registers[7]);
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SelectPrgPage(2, _registers[6]);
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SelectPrgPage(3, lastPageInBlock);
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}
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}
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}; |