There are a great many public-domain utilities that do this. The
 following files can be downloaded from
 <http://www.simtel.net/pub/msdos/sysutl/>:

   cmos14.zip    5965  920817  Saves/restores CMOS to/from file
   cmoser11.zip 28323  910721  386/286 enhanced  CMOS setup program
   cmosram.zip  76096  920214  Save AT/386/486 CMOS data to file and restore
   rom2.zip     15692  900131  Save AT and 386 CMOS data to file and restore
   setup21.zip  18172  880613  Setup program which modifies CMOS RAM
   viewcmos.zip 11068  900225  Display contents of AT CMOS RAM, w/C source

 A program to check and display CMOS memory (but not write to it) is
 downloadable as part of: <http://www.simtel.net/pub/pd/50522.html>
 <ftp://garbo.uwasa.fi/pc/ts/tsutle23.zip>

 Good reports of CMOS299.ZIP have been posted, but it no longer appears
 to be online.

 Stan Brown, the former list maintainer, reports that he personally
 tested CMOSRAM and that it worked fine. It contains an excellent (and
 witty) .DOC file that explains the hardware involved and gives specific
 recommendations for preventing disaster or recovering from it. It's $5
 shareware.

 Robert Jourdain's {Programmer's Problem Solver for the IBM PC, XT, and
 AT} has code for accessing the CMOS RAM, according to an article posted
 in this newsgroup.

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