--- a/src/m/convex.h	Mon Aug 13 11:19:22 2007 +0200
+++ b/src/m/convex.h	Mon Aug 13 11:20:41 2007 +0200
@@ -24,6 +24,11 @@
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-3"  */
 
+/* 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.  */
 #ifndef convex  /* The compiler doesn't always do this.  */
@@ -86,6 +91,9 @@
 
 /* #define NO_REMAP */
 
+/* Addresses on the Convex have the high bit set.  */
+#define DATA_SEG_BITS (1 << (INTBITS-1))
+
 /* Right shift is logical shift.
    And the usual way of handling such machines, which involves
    copying the number into sign_extend_temp, does not work