I discovered a bug in the resettodr routine in clock.c that causes the
clock chip to appear to be not working.  (i.e. on boot, the kernel
says -- Warning: no clock chip found. )  It sets the month to 13!

There were also a couple other bugs that needed fixing.  They had to do
with dst, timezones and leap years.

Here is a patch that makes it work correctly.

--Phil

(p.s. this has not yet been checked in on sun-lamp.  It will be done soon.)


*** clock.c.orig	Mon Dec  5 11:10:56 1994
--- clock.c	Mon Dec  5 11:10:55 1994
***************
*** 1,5 ****
! /*	$NetBSD: clock.c,v 1.6.2.1 1994/10/19 19:07:14 cgd Exp $
! */
  
  /*-
   * Copyright (c) 1990 The Regents of the University of California.
--- 1,4 ----
! /*	$NetBSD: clock.c,v 1.8 1994/10/26 08:24:52 cgd Exp $	*/
  
  /*-
   * Copyright (c) 1990 The Regents of the University of California.
***************
*** 59,66 ****
  extern struct timezone tz;
  
  /* Conversion data */
! static const short daymon[12] = {
!     0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
  };
  
  /* Defines to make code more readable. */
--- 58,65 ----
  extern struct timezone tz;
  
  /* Conversion data */
! static const short daymon[13] = {
!     0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365
  };
  
  /* Defines to make code more readable. */
***************
*** 68,74 ****
  #define FROMBCD(B)	(((B)>>4) * 10 + ((B)&0xf))
  #define TOBCD(D)	((((D)/10)<<4) + (D)%10)
  
! #define DAYMON(M,L)	(daymon[(M)] + ((L) && (M) > 0))
  
  #define SECDAY		(24*60*60)
  #define SECMON(M,L)	(DAYMON(M,L)*SECDAY)
--- 67,73 ----
  #define FROMBCD(B)	(((B)>>4) * 10 + ((B)&0xf))
  #define TOBCD(D)	((((D)/10)<<4) + (D)%10)
  
! #define DAYMON(M,L)	(daymon[(M)] + ((L) && (M) > 1))
  
  #define SECDAY		(24*60*60)
  #define SECMON(M,L)	(DAYMON(M,L)*SECDAY)
***************
*** 146,151 ****
--- 145,154 ----
      /* Check to see if it was really the rtc by checking for bad date info. */
      if (sec > 59 || min > 59 || hour > 23 || dom > 31 || month > 12) {
  	printf("inittodr: No clock found\n");
+ #ifdef TEST
+ 	printf ("sec=%d, min=%d, hour=%d, dom=%d, month=%d\n",
+ 		 sec, min, hour, dom, month);
+ #endif
  	have_rtc = 0;
  	time.tv_sec = base;
  	return;
***************
*** 203,211 ****
      /* XXX apply 1-day tweak? */
  
      /* apply local offset */
!     sec -= tz.tz_minuteswest * 60;
      if (tz.tz_dsttime)
! 	sec += 60 * 60;
  
      year = 70;
      for (;;) {
--- 206,214 ----
      /* XXX apply 1-day tweak? */
  
      /* apply local offset */
!     t -= tz.tz_minuteswest * 60;
      if (tz.tz_dsttime)
! 	t += 60 * 60;
  
      year = 70;
      for (;;) {