54 lines
1.1 KiB
C#
54 lines
1.1 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("Jaleco Early Mapper 0", 72)]
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internal class Mapper072 : Board
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{
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private byte writeData;
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private int chr_reg;
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private int prg_reg;
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internal override void HardReset()
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{
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base.HardReset();
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Switch16KPRG(PRG_ROM_16KB_Mask, PRGArea.AreaC000);
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writeData = 0;
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chr_reg = (prg_reg = 0);
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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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switch ((data >> 6) & 3)
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{
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case 0:
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Switch08KCHR(chr_reg);
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Switch16KPRG(prg_reg, PRGArea.Area8000);
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break;
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case 1:
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chr_reg = data & 0xF;
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break;
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case 2:
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prg_reg = data & 0xF;
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break;
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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(chr_reg);
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stream.Write(prg_reg);
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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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chr_reg = stream.ReadInt32();
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prg_reg = stream.ReadInt32();
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}
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}
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}
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