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diff --git a/chips/dz_defs.h b/chips/dz_defs.h
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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.
+ */
+/*
+ *	File: dz_defs.h
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	9/90
+ *
+ *	Internal definitions for the DZ Serial Line Driver
+ */
+
+#include <mach/std_types.h>
+#include <chips/busses.h>
+
+#include <kern/time_out.h>
+#include <sys/syslog.h>
+
+#include <device/io_req.h>
+#include <device/conf.h>
+#include <device/tty.h>
+#include <device/errno.h>
+
+#include <chips/dz_7085.h>
+
+extern struct tty *dz_tty[];
+
+extern struct pseudo_dma {
+	dz_regmap_t	*p_addr;
+	char		*p_mem;
+	char		*p_end;
+	int		p_arg;
+	int		(*p_fcn)();
+} dz_pdma[];
+
+extern int rcline, cnline;
+extern int	console;
+
+/*
+ * Modem control operations on DZ lines
+ */
+
+extern unsigned dz_mctl(/* int, int, int */);
+