--- xinu/sys/preset.c	2018/04/24 17:39:03	1.1
+++ xinu/sys/preset.c	2018/04/24 17:39:34	1.1.1.2
@@ -13,19 +13,21 @@ SYSCALL	preset(portid, dispose)
 	int	portid;
 	int	(*dispose)();
 {
-	PStype	ps;
 	struct	pt *ptptr;
 
-	disable(ps);
+#ifdef	DEBUG
+	dotrace("preset", &portid, 2);
+#endif
+	disable();
 	if ( isbadport(portid) ||
 #ifdef	MEMMARK
 	     unmarked(ptmark) ||
 #endif
 	     (ptptr= &ports[portid])->ptstate != PTALLOC ) {
-		restore(ps);
+		restore();
 		return(SYSERR);
 	}
 	_ptclear(ptptr, PTALLOC, dispose);
-	restore(ps);
+	restore();
 	return(OK);
 }