32 lines
755 B
C
32 lines
755 B
C
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#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class A65AS : public BaseMapper
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{
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protected:
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uint16_t GetPRGPageSize() { return 0x4000; }
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uint16_t GetCHRPageSize() { return 0x2000; }
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void InitMapper() override
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{
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SelectCHRPage(0, 0);
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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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if(value & 0x40) {
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SelectPrgPage2x(0, value & 0x1E);
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} else {
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SelectPRGPage(0, ((value & 0x30) >> 1) | (value & 0x07));
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SelectPRGPage(1, ((value & 0x30) >> 1) | 0x07);
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}
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if(value & 0x80) {
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SetMirroringType(value & 0x20 ? MirroringType::ScreenBOnly : MirroringType::ScreenAOnly);
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} else {
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SetMirroringType(value & 0x08 ? MirroringType::Horizontal : MirroringType::Vertical);
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}
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}
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};
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