59 lines
1.3 KiB
C#
59 lines
1.3 KiB
C#
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using System.IO;
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namespace MyNes.Core
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{
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[BoardInfo("Caltron 6-in-1", 41)]
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internal class Mapper041 : Board
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{
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private bool enableReg;
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private int vromReg;
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internal override void HardReset()
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{
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base.HardReset();
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vromReg = 0;
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enableReg = true;
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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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if (address <= 26623)
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{
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Switch32KPRG(address & 7, PRGArea.Area8000);
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enableReg = (address & 4) == 4;
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vromReg = (vromReg & 3) | ((address >> 1) & 0xC);
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Switch08KCHR(vromReg);
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Switch01KNMTFromMirroring(((address & 0x20) == 32) ? Mirroring.Horz : Mirroring.Vert);
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}
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else
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{
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base.WriteSRM(ref address, ref data);
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}
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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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if (enableReg)
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{
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vromReg = (vromReg & 0xC) | (data & 3);
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Switch08KCHR(vromReg);
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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(enableReg);
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stream.Write(vromReg);
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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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enableReg = stream.ReadBoolean();
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vromReg = stream.ReadInt32();
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}
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}
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}
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