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https://github.com/NovaSquirrel/Mesen-X.git
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54 lines
1 KiB
C++
54 lines
1 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class FaridUnrom : public BaseMapper
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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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virtual uint16_t GetPRGPageSize() override { return 0x4000; }
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virtual uint16_t GetCHRPageSize() override { return 0x2000; }
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bool HasBusConflicts() override { return true; }
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void InitMapper() override
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{
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SelectPRGPage(0, 0);
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SelectPRGPage(1, 7);
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SelectCHRPage(0, 0);
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}
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void Reset(bool softReset) override
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{
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BaseMapper::Reset(softReset);
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if(softReset) {
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_reg = _reg & 0x87;
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} else {
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_reg = 0;
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}
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}
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void StreamState(bool saving) override
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{
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BaseMapper::StreamState(saving);
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Stream(_reg);
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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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bool locked = _reg & 0x08;
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if(!locked && (_reg & 0x80) == 0 && (value & 0x80)) {
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//Latch bits
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_reg = (_reg & 0x87) | (value & 0x78);
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}
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_reg = (_reg & 0x78) | (value & 0x87);
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uint8_t outer = _reg & 0x70;
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SelectPRGPage(0, (_reg & 0x07) | (outer >> 1));
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SelectPRGPage(1, 0x07 | (outer >> 1));
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}
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}; |