62 lines
1.5 KiB
C#
62 lines
1.5 KiB
C#
using System.IO;
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namespace MyNes.Core
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{
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[BoardInfo("Unknown", 228)]
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[HassIssues]
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internal class Mapper228 : Board
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{
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private byte[] RAM;
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private int bank;
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internal override string Issues => MNInterfaceLanguage.IssueMapper228;
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internal override void HardReset()
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{
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base.HardReset();
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RAM = new byte[4];
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}
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internal override void WriteEX(ref ushort address, ref byte data)
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{
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RAM[address & 3] = (byte)(data & 0xFu);
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}
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internal override void ReadEX(ref ushort address, out byte data)
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{
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data = RAM[address & 3];
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}
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internal override void WritePRG(ref ushort address, ref byte data)
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{
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Switch08KCHR(((address & 0xF) << 2) | (data & 3));
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Switch01KNMTFromMirroring(((address & 0x2000) == 8192) ? Mirroring.Horz : Mirroring.Vert);
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bank = ((address >> 7) & 0x1F) + ((address >> 7) & (address >> 8) & 0x10);
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if ((address & 0x20) == 32)
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{
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Switch16KPRG((bank << 2) | ((address >> 5) & 2), PRGArea.Area8000);
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Switch16KPRG((bank << 2) | ((address >> 5) & 2), PRGArea.AreaC000);
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}
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else
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{
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Switch32KPRG(bank, PRGArea.Area8000);
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}
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}
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internal override void WriteStateData(ref BinaryWriter stream)
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{
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base.WriteStateData(ref stream);
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stream.Write(RAM);
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stream.Write(bank);
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}
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internal override void ReadStateData(ref BinaryReader stream)
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{
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base.ReadStateData(ref stream);
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stream.Read(RAM, 0, RAM.Length);
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bank = stream.ReadInt32();
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}
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}
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}
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