--- a/src/m/att3b.h	Mon Aug 13 11:13:33 2007 +0200
+++ b/src/m/att3b.h	Mon Aug 13 11:14:34 2007 +0200
@@ -26,23 +26,10 @@
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2-2"  */
 
-/* Define WORD_MACHINE if addresses and such have
- * to be corrected before they can be used as byte counts.  */
-
-/* #define WORD_MACHINE */
-
 /* Now define a symbol for the cpu type, if your compiler
    does not define it automatically */
 #define ATT3B
 
-/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
-   the bit field into an int.  In other words, if bit fields
-   are always unsigned.
-
-   If you use NO_UNION_TYPE, this flag does not matter.  */
-
-#define EXPLICIT_SIGN_EXTEND
-
 /* Data type of load average, as read out of kmem.  */
 /* #define LOAD_AVE_TYPE long */