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diff --git a/boards/12in1.c b/boards/12in1.c
new file mode 100644
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--- /dev/null
+++ b/boards/12in1.c
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+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2009 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
+ *
+ * 7-in-1 Darkwing Duck, Snake, MagicBlock (PCB marked as "12 in 1")
+ */
+
+#include "mapinc.h"
+
+static uint8 reg[4];
+static SFORMAT StateRegs[]=
+{
+  {reg, 4, "REGS"},
+  {0}
+};
+
+static void Sync(void)
+{
+    uint8 bank = (reg[3]&3)<<3;
+    setchr4(0x0000, (reg[1]>>3)|(bank<<2));
+    setchr4(0x1000, (reg[2]>>3)|(bank<<2));
+    if(reg[3]&8)
+    {
+      setprg32(0x8000,((reg[2]&7)>>1)|bank);
+    }
+    else
+    {
+      setprg16(0x8000, (reg[1]&7)|bank);
+      setprg16(0xc000, 7|bank);
+    }
+    setmirror(((reg[3]&4)>>2)^1);
+}
+
+static DECLFW(BMC12IN1Write)
+{
+  switch(A)
+  {
+  case 0xafff: reg[0] = V; break;
+  case 0xbfff: reg[1] = V; break;
+  case 0xdfff: reg[2] = V; break;
+  case 0xefff: reg[3] = V; break;
+  }
+  Sync();
+}
+
+static void BMC12IN1Power(void)
+{
+  reg[0]=reg[1]=reg[2]=reg[3]=0;
+  Sync();
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+  SetWriteHandler(0x8000,0xFFFF,BMC12IN1Write);
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void BMC12IN1_Init(CartInfo *info)
+{
+  info->Power=BMC12IN1Power;
+  GameStateRestore=StateRestore;
+  AddExState(&StateRegs, ~0, 0, 0);
+}