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diff --git a/src/d_ticcmd.h b/src/d_ticcmd.h
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+/* Emacs style mode select   -*- C++ -*-
+ *-----------------------------------------------------------------------------
+ *
+ *
+ *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
+ *  based on BOOM, a modified and improved DOOM engine
+ *  Copyright (C) 1999 by
+ *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+ *  Copyright (C) 1999-2000 by
+ *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
+ *  Copyright 2005, 2006 by
+ *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
+ *
+ *  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.
+ *
+ * DESCRIPTION:
+ *  System specific interface stuff.
+ *
+ *-----------------------------------------------------------------------------*/
+
+#ifndef __D_TICCMD__
+#define __D_TICCMD__
+
+#include "doomtype.h"
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+/* The data sampled per tick (single player)
+ * and transmitted to other peers (multiplayer).
+ * Mainly movements/button commands per game tick,
+ * plus a checksum for internal state consistency.
+ * CPhipps - explicitely signed the elements, since they have to be signed to work right
+ */
+typedef struct
+{
+  signed char forwardmove;  /* *2048 for move       */
+  signed char sidemove; /* *2048 for move       */
+  signed short  angleturn;  /* <<16 for angle delta */
+  short consistancy;          /* checks for net game  */
+  byte  chatchar;
+  byte  buttons;
+} ticcmd_t;
+
+#endif