78 lines
1.9 KiB
C#
78 lines
1.9 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("Namco 109", 76)]
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internal class Mapper076 : Board
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{
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private int address_8001;
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private bool prg_a;
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private byte prg_reg;
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internal override void HardReset()
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{
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base.HardReset();
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Switch08KPRG(PRG_ROM_08KB_Mask - 1, PRGArea.AreaC000);
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Switch08KPRG(PRG_ROM_08KB_Mask, PRGArea.AreaE000);
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address_8001 = 0;
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prg_a = false;
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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 (address & 0xE001)
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{
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case 32768:
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address_8001 = data & 7;
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prg_a = (data & 0x40) == 64;
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Switch08KPRG(prg_reg, prg_a ? PRGArea.AreaC000 : PRGArea.Area8000);
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break;
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case 32769:
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switch (address_8001)
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{
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case 2:
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Switch02KCHR(data, CHRArea.Area0000);
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break;
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case 3:
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Switch02KCHR(data, CHRArea.Area0800);
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break;
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case 4:
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Switch02KCHR(data, CHRArea.Area1000);
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break;
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case 5:
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Switch02KCHR(data, CHRArea.Area1800);
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break;
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case 6:
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Switch08KPRG(prg_reg = data, prg_a ? PRGArea.AreaC000 : PRGArea.Area8000);
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break;
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case 7:
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Switch08KPRG(data, PRGArea.AreaA000);
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break;
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}
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break;
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case 40960:
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Switch01KNMTFromMirroring(((data & 1) == 1) ? Mirroring.Horz : Mirroring.Vert);
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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(address_8001);
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stream.Write(prg_a);
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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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address_8001 = stream.ReadInt32();
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prg_a = stream.ReadBoolean();
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prg_reg = stream.ReadByte();
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}
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}
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}
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