59 lines
1.6 KiB
C#
59 lines
1.6 KiB
C#
using System.IO;
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namespace MyNes.Core
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{
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[BoardInfo("Unknown", 53)]
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[HassIssues]
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internal class Mapper053 : Board
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{
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private byte[] regs = new byte[2];
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private bool epromFirst;
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internal override string Issues => MNInterfaceLanguage.IssueMapper53;
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internal override void HardReset()
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{
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base.HardReset();
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regs = new byte[2];
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epromFirst = true;
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Switch08KPRG(0, PRGArea.Area6000);
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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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regs[1] = data;
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UpdatePrg();
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}
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internal override void WriteSRM(ref ushort address, ref byte data)
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{
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regs[0] = data;
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UpdatePrg();
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Switch01KNMTFromMirroring(((data & 0x20) == 32) ? Mirroring.Horz : Mirroring.Vert);
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}
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private void UpdatePrg()
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{
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int num = (regs[0] << 3) & 0x78;
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Switch08KPRG(((num << 1) | 0xF) + (epromFirst ? 4 : 0), PRGArea.Area6000);
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Switch16KPRG(((regs[0] & 0x10) == 16) ? ((num | (regs[1] & 7)) + (epromFirst ? 2 : 0)) : ((!epromFirst) ? 128 : 0), PRGArea.Area8000);
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Switch16KPRG(((regs[0] & 0x10) == 16) ? ((num | 7) + (epromFirst ? 2 : 0)) : (epromFirst ? 1 : 129), PRGArea.AreaC000);
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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(regs);
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stream.Write(epromFirst);
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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(regs, 0, 2);
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epromFirst = stream.ReadBoolean();
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}
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}
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}
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