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diff --git a/boards/177.c b/boards/177.c
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--- /dev/null
+++ b/boards/177.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 reg;
+
+static uint8 *WRAM=NULL;
+static uint32 WRAMSIZE;
+
+static SFORMAT StateRegs[]=
+{
+  {&reg, 1, "REG"},
+  {0}
+};
+
+static void Sync(void)
+{
+  setchr8(0);
+  setprg8r(0x10,0x6000,0);
+  setprg32(0x8000,reg&0x1f);
+  setmirror(((reg&0x20)>>5)^1);
+}
+
+static DECLFW(M177Write)
+{
+  reg=V;
+  Sync();
+}
+
+static void M177Power(void)
+{
+  reg=0;
+  Sync();     
+  SetReadHandler(0x6000,0x7fff,CartBR);
+  SetWriteHandler(0x6000,0x7fff,CartBW);
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+  SetWriteHandler(0x8000,0xFFFF,M177Write);
+}
+
+static void M177Close(void)
+{
+  if(WRAM)
+    FCEU_gfree(WRAM);
+  WRAM=NULL;
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void Mapper177_Init(CartInfo *info)
+{
+  info->Power=M177Power;
+  info->Close=M177Close;
+  GameStateRestore=StateRestore;
+
+  WRAMSIZE=8192;
+  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
+  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
+  AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+  if(info->battery)
+  {
+    info->SaveGame[0]=WRAM;
+    info->SaveGameLen[0]=WRAMSIZE;
+  }
+
+  AddExState(&StateRegs, ~0, 0, 0);
+}