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diff --git a/boards/smb2j.c b/boards/smb2j.c
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--- /dev/null
+++ b/boards/smb2j.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
+ * Super Mario Bros 2 J alt version
+ * as well as "Voleyball" FDS conversion, bank layot is similar but no bankswitching and CHR ROM present
+ */
+
+#include "mapinc.h"
+
+static uint8 prg, IRQa;
+static uint16 IRQCount;
+
+static SFORMAT StateRegs[]=
+{
+  {&prg, 1, "PRG"},
+  {&IRQa, 1, "IRQA"},
+  {&IRQCount, 2, "IRQC"},
+  {0}
+};
+
+static void Sync(void)
+{
+  setprg4r(1,0x5000,1);
+  setprg8r(1,0x6000,1);
+  setprg32(0x8000,prg);
+  setchr8(0);
+}
+
+static DECLFW(UNLSMB2JWrite)
+{
+  if(A==0x4022)
+  {
+    prg=V&1;
+    Sync();
+  }
+  if(A==0x4122)
+  {
+    IRQa=V;
+    IRQCount=0;
+    X6502_IRQEnd(FCEU_IQEXT);
+  }
+}
+
+static void UNLSMB2JPower(void)
+{
+  prg=~0;
+  Sync();
+  SetReadHandler(0x5000,0x7FFF,CartBR);
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+  SetWriteHandler(0x4020,0xffff,UNLSMB2JWrite);
+}
+
+static void UNLSMB2JReset(void)
+{ 
+  prg=~0;
+  Sync();
+}
+
+static void UNLSMB2JIRQHook(int a)
+{
+  if(IRQa)
+  {
+    IRQCount+=a*3;
+    if((IRQCount>>12)==IRQa)
+      X6502_IRQBegin(FCEU_IQEXT);
+  }
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void UNLSMB2J_Init(CartInfo *info)
+{
+  info->Reset=UNLSMB2JReset;
+  info->Power=UNLSMB2JPower;
+  MapIRQHook=UNLSMB2JIRQHook;
+  GameStateRestore=StateRestore;
+  AddExState(&StateRegs, ~0, 0, 0);
+}