164 lines
4.4 KiB
C#
164 lines
4.4 KiB
C#
using System.IO;
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namespace MyNes.Core
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{
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[BoardInfo("VRC2", 23)]
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internal class Mapper023 : Board
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{
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private int[] chr_Reg;
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private byte security;
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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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chr_Reg = new int[8];
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security = 0;
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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 == 24576)
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{
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security = (byte)(data & 1u);
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}
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}
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internal override void ReadSRM(ref ushort address, out byte data)
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{
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if (address == 24576)
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{
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data = security;
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}
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else
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{
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data = 0;
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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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switch (address)
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{
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case 32768:
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case 32769:
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case 32770:
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case 32771:
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Switch08KPRG(data & 0xF, PRGArea.Area8000);
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break;
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case 36864:
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case 36865:
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case 36866:
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case 36867:
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switch (data & 3)
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{
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case 0:
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Switch01KNMTFromMirroring(Mirroring.Vert);
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break;
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case 1:
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Switch01KNMTFromMirroring(Mirroring.Horz);
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break;
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case 2:
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Switch01KNMTFromMirroring(Mirroring.OneScA);
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break;
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case 3:
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Switch01KNMTFromMirroring(Mirroring.OneScB);
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break;
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}
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break;
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case 40960:
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case 40961:
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case 40962:
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case 40963:
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Switch08KPRG(data & 0xF, PRGArea.AreaA000);
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break;
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case 45056:
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chr_Reg[0] = (chr_Reg[0] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[0], CHRArea.Area0000);
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break;
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case 45057:
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chr_Reg[0] = (chr_Reg[0] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[0], CHRArea.Area0000);
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break;
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case 45058:
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chr_Reg[1] = (chr_Reg[1] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[1], CHRArea.Area0400);
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break;
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case 45059:
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chr_Reg[1] = (chr_Reg[1] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[1], CHRArea.Area0400);
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break;
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case 49152:
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chr_Reg[2] = (chr_Reg[2] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[2], CHRArea.Area0800);
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break;
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case 49153:
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chr_Reg[2] = (chr_Reg[2] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[2], CHRArea.Area0800);
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break;
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case 49154:
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chr_Reg[3] = (chr_Reg[3] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[3], CHRArea.Area0C00);
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break;
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case 49155:
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chr_Reg[3] = (chr_Reg[3] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[3], CHRArea.Area0C00);
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break;
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case 53248:
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chr_Reg[4] = (chr_Reg[4] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[4], CHRArea.Area1000);
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break;
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case 53249:
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chr_Reg[4] = (chr_Reg[4] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[4], CHRArea.Area1000);
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break;
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case 53250:
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chr_Reg[5] = (chr_Reg[5] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[5], CHRArea.Area1400);
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break;
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case 53251:
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chr_Reg[5] = (chr_Reg[5] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[5], CHRArea.Area1400);
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break;
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case 57344:
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chr_Reg[6] = (chr_Reg[6] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[6], CHRArea.Area1800);
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break;
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case 57345:
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chr_Reg[6] = (chr_Reg[6] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[6], CHRArea.Area1800);
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break;
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case 57346:
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chr_Reg[7] = (chr_Reg[7] & 0xF0) | (data & 0xF);
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Switch01KCHR(chr_Reg[7], CHRArea.Area1C00);
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break;
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case 57347:
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chr_Reg[7] = (chr_Reg[7] & 0xF) | ((data & 0xF) << 4);
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Switch01KCHR(chr_Reg[7], CHRArea.Area1C00);
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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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for (int i = 0; i < chr_Reg.Length; i++)
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{
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stream.Write(chr_Reg[i]);
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}
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stream.Write(security);
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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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for (int i = 0; i < chr_Reg.Length; i++)
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{
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chr_Reg[i] = stream.ReadInt32();
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}
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security = stream.ReadByte();
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}
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}
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}
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