--- xinu/h/ports.h	2018/04/24 17:39:02	1.1
+++ xinu/h/ports.h	2018/04/24 17:39:14	1.1.1.2
@@ -1,6 +1,6 @@
 /* ports.h - isbadport */
 
-#define	NPORTS		50		/* maximum number of ports	*/
+#define	NPORTS		30		/* maximum number of ports	*/
 #define	MAXMSGS		100		/* maximum messages on all ports*/
 #define	PTFREE		'\01'		/* port is Free			*/
 #define	PTLIMBO		'\02'		/* port is being deleted/reset	*/
@@ -8,7 +8,7 @@
 #define	PTEMPTY		-1		/* initial semaphore entries	*/
 
 struct	ptnode	{			/* node on list of message ptrs	*/
-	int	ptmsg;			/* a message			*/
+	WORD	ptmsg;			/* a one-word message		*/
 	struct	ptnode	*ptnext;	/* address of next node on list	*/
 };
 
@@ -30,4 +30,4 @@ extern	int	ptnextp;		/* next port to exa
 extern	MARKER	ptmark;
 #endif
 
-#define	isbadport(portid)	( (portid)<0 || (portid)>=NPORTS )
+#define	isbadport(pid)	( (pid)<0 || (pid)>=NPORTS )