--- multiplexer/global.c	2001/04/03 21:14:33	1.3
+++ multiplexer/global.c	2001/04/09 15:26:03	1.4
@@ -22,6 +22,11 @@ long logtpc;
 timepoll *ltp;
 #endif
 
+/* Provide the present system time in relative milliseconds.
+ * The zero point may be moved as unconditional waiting is proposed
+ * in the dispatcher, but timed_io=FALSE.
+ * Return: milliseconds
+ */
 t_msec msec_now (void)
 {
 #define MSEC_EXPONENT 21
@@ -48,6 +53,9 @@ t_msec msec_now (void)
   return (now + global_delta);
 }
 
+/* Convert a clock reference value (90kHz) to millisenconds,
+ * using a conversion base to avoid wrap around errors.
+ */
 void cref2msec (conversion_base *b,
     clockref c,
     t_msec *m)
@@ -70,6 +78,9 @@ void cref2msec (conversion_base *b,
   *m = (d / 90) + b->msec;
 }
  
+/* Convert milliseconds to a clock reference value (90kHz),
+ * using a conversion base to avoid wrap around errors.
+ */
 void msec2cref (conversion_base *b,
     t_msec m,
     clockref *c)