87 lines
1.6 KiB
C#
87 lines
1.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace BizHawk.Emulation.Consoles.Nintendo
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{
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// Creatom
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// specs pulled from Nintendulator sources
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public class Mapper132 : NES.NESBoardBase
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{
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//configuraton
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int prg_mask, chr_mask;
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//state
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int prg, chr;
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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switch (Cart.board_type)
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{
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case "MAPPER132":
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case "UNIF_UNL-22211":
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break;
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default:
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return false;
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}
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prg_mask = Cart.prg_size / 32 - 1;
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chr_mask = Cart.chr_size / 8 - 1;
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SetMirrorType(Cart.pad_h, Cart.pad_v);
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return true;
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}
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byte reg
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{
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set
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{
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prg = (value & 0x4) >> 2;
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prg &= prg_mask;
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chr = (value & 0x3);
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chr &= chr_mask;
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}
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get
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{
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return (byte)(prg << 2 | chr);
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}
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}
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public override void WriteEXP(int addr, byte value)
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{
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if ((addr & 0x103) == 0x102)
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reg = (byte)(value & 0x0f);
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}
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public override byte ReadEXP(int addr)
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{
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if ((addr & 0x100) != 0)
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return (byte)((NES.DB & 0xf0) | reg);
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else if ((addr & 0x1000) == 0)
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return NES.DB;
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else
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return 0xff;
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}
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public override byte ReadPRG(int addr)
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{
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return ROM[addr + (prg << 15)];
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}
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public override byte ReadPPU(int addr)
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{
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if (addr < 0x2000)
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{
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return VROM[addr + (chr << 13)];
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}
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else return base.ReadPPU(addr);
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}
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public override void SyncState(Serializer ser)
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{
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base.SyncState(ser);
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ser.Sync("chr", ref chr);
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ser.Sync("prg", ref prg);
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}
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}
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}
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