78 lines
1.9 KiB
C#
78 lines
1.9 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper202 150-in-1 //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using static VirtualNes.Core.CPU;
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using INT = System.Int32;
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using BYTE = System.Byte;
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using System;
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using Codice.CM.Client.Differences;
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namespace VirtualNes.Core
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{
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public class Mapper202 : Mapper
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{
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public Mapper202(NES parent) : base(parent)
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{
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}
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public override void Reset()
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{
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SetPROM_16K_Bank(4, 6);
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SetPROM_16K_Bank(6, 7);
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if (VROM_1K_SIZE != 0)
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{
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SetVROM_8K_Bank(0);
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}
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}
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//void Mapper202::ExWrite(WORD addr, BYTE data)
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public override void ExWrite(ushort addr, byte data)
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{
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if (addr >= 0x4020)
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{
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WriteSub(addr, data);
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}
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}
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//void Mapper202::WriteLow(WORD addr, BYTE data)
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public override void WriteLow(ushort addr, byte data)
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{
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WriteSub(addr, data);
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}
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//void Mapper202::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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WriteSub(addr, data);
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}
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void WriteSub(ushort addr, BYTE data)
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{
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INT bank = (addr >> 1) & 0x07;
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SetPROM_16K_Bank(4, bank);
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if ((addr & 0x0C) == 0x0C)
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{
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SetPROM_16K_Bank(6, bank + 1);
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}
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else
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{
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SetPROM_16K_Bank(6, bank);
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}
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SetVROM_8K_Bank(bank);
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if ((addr & 0x01) != 0)
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{
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SetVRAM_Mirror(VRAM_HMIRROR);
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}
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else
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{
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SetVRAM_Mirror(VRAM_VMIRROR);
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}
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}
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}
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}
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