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TCP-group 1991

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updated NOS code on thumper

> It turns out that you can convert the PC/AT's raw 8254 clocks (generated by
> a 3.579545... MHz NTSC color burst crystal divided by 3) exactly into
> milliseconds by multiplying by 11 and dividing by 13,125.
> ...
> Phil

Well...  almost correct.  Actually the crystal is a 14.31818 MHz crystal
(4x color subcarrier).  This is divided by 12 to 1.19318 MHz, which works
out to the same frequency as the one you are working with.


Ben Thornton             packet:  WD5HLS @ KB5PM
Video Associates       Internet:  ben@val.com
Austin, TX                 uucp:  ...!cs.utexas.edu!val!ben
Did Schrodinger exist? ...or was that in another universe?

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Ralf D. Kloth, Ludwigsburg, DE (QRQ.software). < hostmaster at a00.de > [don't send spam]
Created 2004-12-21. Last modified 2004-12-21. Your visit 2021-10-24 06:20.19. Page created in 0.0193 sec.
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