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65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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//Missing Flash rom support, and only tested via a test rom
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class Cheapocabra : public BaseMapper
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{
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private:
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uint8_t _reg;
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uint8_t* _extraNametables[4];
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protected:
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virtual uint16_t GetPRGPageSize() override { return 0x8000; }
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virtual uint16_t GetCHRPageSize() override { return 0x2000; }
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virtual uint16_t RegisterStartAddress() override { return 0x5000; }
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virtual uint16_t RegisterEndAddress() override { return 0x5FFF; }
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virtual uint32_t GetChrRamSize() override { return 0x8000; }
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void InitMapper() override
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{
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AddRegisterRange(0x7000, 0x7FFF, MemoryOperation::Write);
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for(int i = 0; i < 4; i++) {
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_extraNametables[i] = new uint8_t[0x400];
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BaseMapper::InitializeRam(_extraNametables[i], 0x400);
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AddNametable(4 + i, _extraNametables[i]);
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}
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_reg = 0;
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UpdateState();
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}
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virtual ~Cheapocabra()
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{
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delete[] _extraNametables[0];
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delete[] _extraNametables[1];
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delete[] _extraNametables[2];
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delete[] _extraNametables[3];
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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> extraNametable0{ _extraNametables[0], 0x400 };
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ArrayInfo<uint8_t> extraNametable1{ _extraNametables[1], 0x400 };
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ArrayInfo<uint8_t> extraNametable2{ _extraNametables[2], 0x400 };
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ArrayInfo<uint8_t> extraNametable3{ _extraNametables[3], 0x400 };
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Stream(_reg, extraNametable0, extraNametable1, extraNametable2, extraNametable3);
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}
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void UpdateState()
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{
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SelectPRGPage(0, _reg & 0x0F);
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SelectCHRPage(0, (_reg >> 4) & 0x01);
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if(_reg & 0x20) {
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SetNametables(4, 5, 6, 7);
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} else {
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SetNametables(0, 1, 2, 3);
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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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_reg = value;
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UpdateState();
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}
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}; |