52 lines
1,013 B
C++
52 lines
1,013 B
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class OekaKids : public BaseMapper
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{
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uint8_t _outerChrBank;
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uint8_t _innerChrBank;
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uint16_t _lastAddress;
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protected:
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virtual uint16_t GetPRGPageSize() { return 0x8000; }
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virtual uint16_t GetCHRPageSize() { return 0x2000; }
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virtual bool HasBusConflicts() { return true; }
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void InitMapper()
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{
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_outerChrBank = 0;
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_innerChrBank = 0;
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_lastAddress = 0;
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SelectPRGPage(0, 0);
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}
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void StreamState(bool saving)
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{
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BaseMapper::StreamState(saving);
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Stream(_outerChrBank, _innerChrBank, _lastAddress);
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}
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void UpdateChrBanks()
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{
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SelectCHRPage(0, _outerChrBank | _innerChrBank);
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}
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void NotifyVRAMAddressChange(uint16_t addr)
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{
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if((_lastAddress & 0x3000) != 0x2000 && (addr & 0x3000) == 0x2000) {
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_innerChrBank = (addr >> 8) & 0x03;
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UpdateChrBanks();
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}
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_lastAddress = addr;
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}
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void WriteRegister(uint16_t addr, uint8_t value)
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{
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SelectPRGPage(0, value & 0x03);
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_outerChrBank = value & 0x04;
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UpdateChrBanks();
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}
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};
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