On , Sam Izzo wrote to All :
SI> I decided to write a test program which displayed the date/time according
SI> to
SI> the CMOS and the date/time according to the DOS interrupts, and set them
SI> to
SI> just before 1/1/2000 and let them both tick over.  Of course, the CMOS
SI> said
SI> 1/1/00, and the day of week was Monday, which is incorrect, as it should
SI> be a
SI> Saturday.  The Monday would've been correct if it was 1/1/1900 though.
SI> The DOS
SI> interrupts had the correct information, including the year. I rebooted,
SI> ran the
SI> program again, and DOS still reported 2000.  How did DOS get the year as
SI> 2000
SI> when in the CMOS it said 00?? Oh, and the CMOS setup said 2000.
SI> It would seem, then, that most PCs, even up to this day, have a problem.
SI> Of
SI> course, I could be completely wrong. Can anyone shed some light on all of
SI> this?
The simplest answer would be that...
Only XT user's know that Jan 1st, 1980 was a Tuesday.
Try setting your DOS date to prior to 1980 and see what happens...
Glen.
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