79 lines
1.5 KiB
C#
79 lines
1.5 KiB
C#
using BizHawk.Common;
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using BizHawk.Common.NumberExtensions;
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using System;
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namespace BizHawk.Emulation.Cores.Nintendo.NES
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{
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// Magic Kid GooGoo
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public sealed class Mapper190 : NES.NESBoardBase
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{
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//state
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int prg_reg;
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int[] chr_reg = new int[4];
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public override void SyncState(Serializer ser)
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{
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ser.Sync("prg_reg", ref prg_reg);
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ser.Sync("chr_reg", ref chr_reg, false);
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base.SyncState(ser);
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}
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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 "MAPPER190":
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AssertPrg(256); AssertChr(128); AssertVram(0); AssertWram(8);
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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_reg = 0;
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SetMirrorType(EMirrorType.Vertical);
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return true;
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}
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public override byte ReadPRG(int addr)
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{
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if (addr < 0x4000)
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{
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return ROM[(prg_reg * 0x4000) + addr];
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}
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else
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{
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return ROM[addr - 0x4000];
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}
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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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int bank = addr >> 11;
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int ofs = addr & ((1 << 11) - 1);
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bank = chr_reg[bank];
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addr = (bank << 11) | ofs;
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return VROM[addr];
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}
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else
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return base.ReadPPU(addr);
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}
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public override void WritePRG(int addr, byte value)
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{
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int addr_temp = addr & 0xF000;
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switch (addr_temp)
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{
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case 0x0000: prg_reg = value & 0x7; break;
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case 0x2000: chr_reg[addr & 3] = value & 0x3F; break;
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case 0x4000: prg_reg = 8 | (value & 0x7); break;
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}
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}
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}
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}
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