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diff --git a/boards/103.c b/boards/103.c
new file mode 100644
index 0000000..e25f5fc
--- /dev/null
+++ b/boards/103.c
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+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2007 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "mapinc.h"
+
+static uint8 reg0, reg1, reg2;
+static uint8 *WRAM=NULL;
+static uint32 WRAMSIZE;
+
+static SFORMAT StateRegs[]=
+{
+  {&reg0, 1, "REG0"},
+  {&reg1, 1, "REG1"},
+  {&reg2, 1, "REG2"},
+  {0}
+};
+
+static void Sync(void)
+{
+  setchr8(0);
+  setprg8(0x8000,0xc);
+  setprg8(0xe000,0xf);
+  if(reg2&0x10)
+  {
+    setprg8(0x6000,reg0);
+    setprg8(0xa000,0xd);
+    setprg8(0xc000,0xe);
+  }
+  else
+  {
+    setprg8r(0x10,0x6000,0);
+    setprg4(0xa000,(0xd<<1));
+    setprg2(0xb000,(0xd<<2)+2);
+    setprg2r(0x10,0xb800,4);
+    setprg2r(0x10,0xc000,5);
+    setprg2r(0x10,0xc800,6);
+    setprg2r(0x10,0xd000,7);
+    setprg2(0xd800,(0xe<<2)+3);
+  }
+  setmirror(reg1^1);
+}
+
+static DECLFW(M103RamWrite0)
+{
+  WRAM[A&0x1FFF]=V;
+}
+
+static DECLFW(M103RamWrite1)
+{
+  WRAM[0x2000+((A-0xB800)&0x1FFF)]=V;
+}
+
+static DECLFW(M103Write0)
+{
+  reg0=V&0xf;
+  Sync();
+}
+
+static DECLFW(M103Write1)
+{
+  reg1=(V>>3)&1;
+  Sync();
+}
+
+static DECLFW(M103Write2)
+{
+  reg2=V;
+  Sync();
+}
+
+static void M103Power(void)
+{
+  reg0=reg1=0; reg2=0;
+  Sync();
+  SetReadHandler(0x6000,0x7FFF,CartBR);
+  SetWriteHandler(0x6000,0x7FFF,M103RamWrite0);
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+  SetWriteHandler(0xB800,0xD7FF,M103RamWrite1);
+  SetWriteHandler(0x8000,0x8FFF,M103Write0);
+  SetWriteHandler(0xE000,0xEFFF,M103Write1);
+  SetWriteHandler(0xF000,0xFFFF,M103Write2);
+}
+
+static void M103Close(void)
+{
+  if(WRAM)
+    FCEU_gfree(WRAM);
+  WRAM=NULL;
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void Mapper103_Init(CartInfo *info)
+{
+  info->Power=M103Power;
+  info->Close=M103Close;
+  GameStateRestore=StateRestore;
+
+  WRAMSIZE=16384;
+  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
+  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
+  AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+
+  AddExState(&StateRegs, ~0, 0, 0);
+}