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diff --git a/boards/185.c b/boards/185.c
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+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2005 CaH4e3
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Family Study Box by Fukutake Shoten
+ */
+
+#include "mapinc.h"
+
+static uint8 *DummyCHR=NULL;
+static uint8 datareg;
+static void(*Sync)(void);
+
+
+static SFORMAT StateRegs[]=
+{
+  {&datareg, 1, "DREG"},
+  {0}
+};
+
+//   on    off
+//1  0x0F, 0xF0 - Bird Week
+//2  0x33, 0x00 - B-Wings
+//3  0x11, 0x00 - Mighty Bomb Jack
+//4  0x22, 0x20 - Sansuu 1 Nen, Sansuu 2 Nen
+//5  0xFF, 0x00 - Sansuu 3 Nen
+//6  0x21, 0x13 - Spy vs Spy
+//7  0x20, 0x21 - Seicross
+
+static void Sync185(void)
+{
+  // little dirty eh? ;_)
+  if((datareg&3)&&(datareg!=0x13)) // 1, 2, 3, 4, 5, 6
+   setchr8(0);
+  else
+   setchr8r(0x10,0);
+}
+
+static void Sync181(void)
+{
+  if(!(datareg&1))                      // 7
+   setchr8(0);
+  else
+   setchr8r(0x10,0);
+}
+
+static DECLFW(MWrite)
+{
+  datareg=V;
+  Sync();
+}
+
+static void MPower(void)
+{
+  datareg=0;
+  Sync();
+  setprg16(0x8000,0);
+  setprg16(0xC000,~0);
+  SetWriteHandler(0x8000,0xFFFF,MWrite);
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+}
+
+static void MClose(void)
+{
+  if(DummyCHR)
+    FCEU_gfree(DummyCHR);
+  DummyCHR=NULL;
+}
+
+static void MRestore(int version)
+{
+  Sync();
+}
+
+void Mapper185_Init(CartInfo *info)
+{
+  Sync=Sync185;
+  info->Power=MPower;
+  info->Close=MClose;
+  GameStateRestore=MRestore;
+  DummyCHR=(uint8*)FCEU_gmalloc(8192);
+  int x;
+  for(x=0;x<8192;x++)
+     DummyCHR[x]=0xff;
+  SetupCartCHRMapping(0x10,DummyCHR,8192,0);
+  AddExState(StateRegs, ~0, 0, 0);
+}
+
+void Mapper181_Init(CartInfo *info)
+{
+  Sync=Sync181;
+  info->Power=MPower;
+  info->Close=MClose;
+  GameStateRestore=MRestore;
+  DummyCHR=(uint8*)FCEU_gmalloc(8192);
+  int x;
+  for(x=0;x<8192;x++)
+     DummyCHR[x]=0xff;
+  SetupCartCHRMapping(0x10,DummyCHR,8192,0);
+  AddExState(StateRegs, ~0, 0, 0);
+}