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44 lines
934 B
C++
44 lines
934 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class ActionEnterprises : public BaseMapper
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{
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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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void InitMapper() override
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{
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WriteRegister(0x8000, 0);
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}
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virtual void Reset(bool softReset) override
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{
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WriteRegister(0x8000, 0);
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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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uint8_t chipSelect = (addr >> 11) & 0x03;
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if(chipSelect == 3) {
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chipSelect = 2;
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}
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uint8_t prgPage = ((addr >> 6) & 0x1F) | (chipSelect << 5);
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if(addr & 0x20) {
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SelectPRGPage(0, prgPage);
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SelectPRGPage(1, prgPage);
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} else {
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SelectPRGPage(0, prgPage & 0xFE);
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SelectPRGPage(1, (prgPage & 0xFE) + 1);
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}
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SelectCHRPage(0, ((addr & 0x0F) << 2) | (value & 0x03));
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SetMirroringType(addr & 0x2000 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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};
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