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70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class DaouInfosys : public BaseMapper
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{
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private:
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uint8_t _chrLow[8];
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uint8_t _chrHigh[8];
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protected:
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virtual uint16_t RegisterStartAddress() override { return 0xC000; }
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virtual uint16_t RegisterEndAddress() override { return 0xC014; }
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virtual uint16_t GetPRGPageSize() override { return 0x4000; }
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virtual uint16_t GetCHRPageSize() override { return 0x400; }
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void InitMapper() override
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{
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memset(_chrLow, 0, sizeof(_chrLow));
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memset(_chrHigh, 0, sizeof(_chrHigh));
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SelectPRGPage(1, -1);
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SetMirroringType(MirroringType::ScreenAOnly);
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}
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void StreamState(bool saving) override
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{
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BaseMapper::StreamState(saving);
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ArrayInfo<uint8_t> chrLow{ _chrLow, 8 };
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ArrayInfo<uint8_t> chrHigh{ _chrHigh, 8 };
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Stream(chrLow, chrHigh);
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if(!saving) {
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UpdateChrBanks();
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}
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}
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void UpdateChrBanks()
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{
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for(int i = 0; i < 8; i++) {
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SelectCHRPage(i, (_chrHigh[i] << 8) | _chrLow[i]);
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}
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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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switch(addr) {
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case 0xC000: case 0xC001: case 0xC002: case 0xC003:
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case 0xC004: case 0xC005: case 0xC006: case 0xC007:
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case 0xC008: case 0xC009: case 0xC00A: case 0xC00B:
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case 0xC00C: case 0xC00D: case 0xC00E: case 0xC00F:
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{
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uint8_t bank = (addr & 0x03) + ((addr >= 0xC008) ? 4 : 0);
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uint8_t* arr = (addr & 0x04) ? _chrHigh : _chrLow;
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arr[bank] = value;
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UpdateChrBanks();
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break;
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}
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case 0xC010:
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SelectPRGPage(0, value);
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break;
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case 0xC014:
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SetMirroringType((value & 0x01) == 0x01 ? MirroringType::Horizontal : MirroringType::Vertical);
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break;
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}
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}
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}; |