48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
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#pragma once
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#include "BaseMapper.h"
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class Waixing162 : public BaseMapper
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{
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private:
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uint8_t _regs[4];
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protected:
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uint16_t GetPRGPageSize() { return 0x8000; }
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uint16_t GetCHRPageSize() { return 0x2000; }
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uint16_t RegisterStartAddress() { return 0x5000; }
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uint16_t RegisterEndAddress() { return 0x5FFF; }
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void InitMapper()
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{
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_regs[0] = 3;
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_regs[1] = 0;
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_regs[2] = 0;
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_regs[3] = 7;
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SelectCHRPage(0, 0);
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UpdateState();
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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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ArrayInfo<uint8_t> regs{ _regs, 4 };
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Stream(regs);
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}
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void UpdateState()
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{
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switch(_regs[3] & 0x5) {
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case 0: SelectPRGPage(0, (_regs[0] & 0x0C) | (_regs[1] & 0x02) | ((_regs[2] & 0x0F) << 4)); break;
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case 1: SelectPRGPage(0, (_regs[0] & 0x0C) | (_regs[2] & 0x0F) << 4); break;
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case 4: SelectPRGPage(0, (_regs[0] & 0x0E) | ((_regs[1] >> 1) & 0x01) | ((_regs[2] & 0x0F) << 4)); break;
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case 5: SelectPRGPage(0, (_regs[0] & 0x0F) | ((_regs[2] & 0x0F) << 4)); break;
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}
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}
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void WriteRegister(uint16_t addr, uint8_t value)
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{
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_regs[(addr >> 8) & 0x03] = value;
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UpdateState();
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}
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};
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