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59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "MMC3.h"
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class Bmc830118C : public MMC3
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{
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private:
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uint8_t _reg;
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protected:
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void InitMapper() override
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{
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_reg = 0;
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MMC3::InitMapper();
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AddRegisterRange(0x6800, 0x68FF, MemoryOperation::Write);
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}
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void Reset(bool softReset) override
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{
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_reg = 0;
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MMC3::Reset(softReset);
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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(_reg);
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}
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void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
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{
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MMC3::SelectCHRPage(slot, ((_reg & 0x0C) << 5) | (page & 0x7F), memoryType);
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}
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void SelectPRGPage(uint16_t slot, uint16_t page, PrgMemoryType memoryType = PrgMemoryType::PrgRom) override
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{
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if((_reg & 0x0C) == 0x0C) {
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if(slot == 0) {
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MMC3::SelectPRGPage(0, ((_reg & 0x0C) << 2) | (page & 0x0F));
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MMC3::SelectPRGPage(2, 0x32 | (page & 0x0F));
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} else if(slot == 1) {
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MMC3::SelectPRGPage(1, ((_reg & 0x0C) << 2) | (page & 0x0F));
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MMC3::SelectPRGPage(3, 0x32 | (page & 0x0F));
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}
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} else {
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MMC3::SelectPRGPage(slot, ((_reg & 0x0C) << 2) | (page & 0x0F));
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}
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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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_reg = value;
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UpdateState();
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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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}; |