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+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that: (1) source distributions retain this entire copyright
+ * notice and comment, and (2) distributions including binaries display
+ * the following acknowledgement:  ``This product includes software
+ * developed by the University of California, Berkeley and its contributors''
+ * in the documentation or other materials provided with the distribution
+ * and in all advertising materials mentioning features or use of this
+ * software. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *	@(#)vax.h	5.4 (Berkeley) 6/1/90
+ */
+
+    /*
+     *	opcode of the `calls' instruction
+     */
+#define	CALLS	0xfb
+
+    /*
+     *	offset (in bytes) of the code from the entry address of a routine.
+     *	(see asgnsamples for use and explanation.)
+     */
+#define OFFSET_OF_CODE	2
+#define	UNITS_TO_CODE	(OFFSET_OF_CODE / sizeof(UNIT))
+
+    /*
+     *	register for pc relative addressing
+     */
+#define	PC	0xf
+
+enum opermodes {
+    literal, indexed, reg, regdef, autodec, autoinc, autoincdef, 
+    bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
+    immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
+    longrel, longreldef
+};
+typedef enum opermodes	operandenum;
+
+struct modebyte {
+    unsigned int	regfield:4;
+    unsigned int	modefield:4;
+};
+