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https://github.com/NovaSquirrel/Mesen-X.git
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55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
#pragma once
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#include "MMC1.h"
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class FaridSlrom : public MMC1
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{
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private:
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uint8_t _outerBank;
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bool _locked;
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protected:
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void InitMapper() override
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{
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AddRegisterRange(0x6000, 0x7FFF, MemoryOperation::Write);
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MMC1::InitMapper();
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}
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void Reset(bool softReset) override
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{
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MMC1::Reset(softReset);
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_outerBank = 0;
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_locked = false;
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UpdateState();
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}
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void StreamState(bool saving) override
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{
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MMC1::StreamState(saving);
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Stream(_outerBank, _locked);
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}
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void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType) override
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{
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MMC1::SelectCHRPage(slot, (_outerBank << 2) | (page & 0x1F), memoryType);
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}
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void SelectPRGPage(uint16_t slot, uint16_t page, PrgMemoryType memoryType) override
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{
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MMC1::SelectPRGPage(slot, _outerBank | (page & 0x07), memoryType);
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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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bool wramEnabled = (_state.RegE000 & 0x10) == 0;
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if(wramEnabled && !_locked) {
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_outerBank = (value & 0x70) >> 1;
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_locked = (value & 0x08) == 0x08;
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UpdateState();
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}
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} else {
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MMC1::WriteRegister(addr, value);
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}
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}
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}; |