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diff --git a/include/device/device_types.defs b/include/device/device_types.defs
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date: 	3/89
+ *	
+ *	Common definitions for device interface types.
+ */
+
+#ifndef	_DEVICE_DEVICE_TYPES_DEFS_
+#define	_DEVICE_DEVICE_TYPES_DEFS_
+
+/*
+ *	Basic types
+ */
+
+#include <mach/std_types.defs>
+
+type recnum_t		= unsigned32;
+type dev_mode_t		= unsigned32;
+type dev_flavor_t	= unsigned32;
+type dev_name_t		= (MACH_MSG_TYPE_STRING_C, 8*128);
+type dev_status_t	= array[*:1024] of int;
+type io_buf_ptr_t	= ^array[] of MACH_MSG_TYPE_INTEGER_8;
+type io_buf_ptr_inband_t= array[*:128] of char;
+type filter_t		= short;
+type filter_array_t	= array[*:128] of filter_t;
+
+type device_t = mach_port_t
+		ctype: mach_port_t
+#if	KERNEL_SERVER
+		intran: device_t dev_port_lookup(mach_port_t)
+		outtran: mach_port_t convert_device_to_port(device_t)
+		destructor: device_deallocate(device_t)
+#endif	/* KERNEL_SERVER */
+		;
+
+import <device/device_types.h>;
+import <device/net_status.h>;
+
+#endif	_DEVICE_DEVICE_TYPES_DEFS_