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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

--
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 2024-04-19 21:43.59. Page created in 0.0256 sec.
 
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