@@ -13,3 +13,7 @@
/* size of local machine, either 0 (for 16 bit address space), or 1 */
# define BIGMACHINE 1
+
+/* operating system, SYS_5, V7, BSD4_1 or BSD4_2; Do NOT delete the comment
+ in the next line! */
+# define BSD4_2 1 /* SYSTEM */