🚀 go-pugleaf

I recently wrote a short program which allows you to change the
BIOS clock on a PC.  It took me quite some time to figure out
how to plug things into the interrupt in order to change the
time, but I learned a lot.  One thing I couldn't find anywhere,
though, was how the BIOS clock and the DOS clock interact.  All
I know is that the DOS clock reads the BIOS clock on bootup.

I'm mainly curious because where I work, we have a lot of
computers hooked up to provide a reservation system.  These
computers are constantly generating a lot of interrupts and
my boss refuses to update to a more powerful computer which
can handle them (we're still running an original IBM AT.
Because of all the interrupts, the clock is always falling
behind and screwing up everybody's reservation (if they
don't show up within 6 minutes, all their time is cancelled).
Supposedly, if we just use the DOS "time" command, within
minutes, the time goes back to what it originally was.  The
only way to correct the problem is to update the BIOS clock
and reboot.  What's going on here???

e-mail me at:  schneide@aries.scs.uiuc.edu
If I get enough replies, I will post them.