diff --git a/src/gb/gb_apu/gb.h b/src/gb/gb_apu/gb.h
new file mode 100644
index 00000000..1ae77248
--- /dev/null
+++ b/src/gb/gb_apu/gb.h
@@ -0,0 +1,64 @@
+// -*- C++ -*-
+// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
+// Copyright (C) 1999-2003 Forgotten
+// Copyright (C) 2005-2006 Forgotten and the VBA development team
+
+// 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, 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.
+
+#ifndef VBA_GB_GB_H
+#define VBA_GB_GB_H
+
+#define C_FLAG 0x10
+#define H_FLAG 0x20
+#define N_FLAG 0x40
+#define Z_FLAG 0x80
+
+typedef union {
+  struct {
+#ifdef WORDS_BIGENDIAN
+    u8 B1, B0;
+#else
+    u8 B0,B1;
+#endif
+  } B;
+  u16 W;
+} gbRegister;
+
+extern bool gbLoadRom(const char *);
+extern void gbEmulate(int);
+extern void gbWriteMemory(register u16, register u8);
+extern void gbDrawLine();
+extern bool gbIsGameboyRom(const char *);
+extern void gbSoundReset();
+extern void gbSoundSetQuality(int);
+extern void gbGetHardwareType();
+extern void gbReset();
+extern void gbCleanUp();
+extern void gbCPUInit(const char *,bool);
+extern bool gbWriteBatteryFile(const char *);
+extern bool gbWriteBatteryFile(const char *, bool);
+extern bool gbReadBatteryFile(const char *);
+extern bool gbWriteSaveState(const char *);
+extern bool gbWriteMemSaveState(char *, int);
+extern bool gbReadSaveState(const char *);
+extern bool gbReadMemSaveState(char *, int);
+extern void gbSgbRenderBorder();
+extern bool gbWritePNGFile(const char *);
+extern bool gbWriteBMPFile(const char *);
+extern bool gbReadGSASnapshot(const char *);
+
+extern struct EmulatedSystem GBSystem;
+
+#endif