66 lines
1.4 KiB
C#
66 lines
1.4 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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// mapper036
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// Strike Wolf (MGC-014) [!].nes
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// like an oversize GxROM
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// information from fceux
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public class Mapper036 : NES.NESBoardBase
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{
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int chr;
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int prg;
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int chr_mask;
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int prg_mask;
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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 "MAPPER036":
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AssertVram(0); AssertWram(0);
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break;
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default:
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return false;
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}
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chr_mask = Cart.chr_size / 8 - 1;
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prg_mask = Cart.prg_size / 32 - 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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public override byte ReadPPU(int addr)
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{
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if (addr < 0x2000)
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return VROM[addr | chr << 13];
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else
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return base.ReadPPU(addr);
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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 void WritePRG(int addr, byte value)
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{
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// either hack emulation of a weird bus conflict, or crappy pirate safeguard
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if (addr >= 0x400 && addr <= 0x7ffe)
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{
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chr = value & 15 & chr_mask;
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prg = value >> 4 & 15 & prg_mask;
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}
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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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