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44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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#include "CPU.h"
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class Sunsoft4 : public BaseMapper
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{
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protected:
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virtual uint16_t GetPRGPageSize() { return 0x4000; }
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virtual uint16_t GetCHRPageSize() { return 0x800; }
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void InitMapper()
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{
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SelectPRGPage(1, -1);
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}
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void WriteRegister(uint16_t addr, uint8_t value)
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{
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switch(addr & 0xF000) {
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case 0x8000: SelectCHRPage(0, value); break;
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case 0x9000: SelectCHRPage(1, value); break;
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case 0xA000: SelectCHRPage(2, value); break;
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case 0xB000: SelectCHRPage(3, value); break;
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case 0xC000:
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//TODO
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break;
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case 0xD000:
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//TODO
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break;
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case 0xE000:
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switch(value & 0x03) {
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case 0: SetMirroringType(MirroringType::Vertical); break;
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case 1: SetMirroringType(MirroringType::Horizontal); break;
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case 2: SetMirroringType(MirroringType::ScreenAOnly); break;
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case 3: SetMirroringType(MirroringType::ScreenBOnly); break;
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}
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break;
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case 0xF000:
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SelectPRGPage(0, value & 0x0F);
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//_prgRamEnabled = (value & 0x10) == 0x10;
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break;
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}
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}
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}; |