[ntp:questions] how do I lock in average frequency correction

John Hasler jhasler at newsguy.com
Wed Feb 15 14:33:54 UTC 2012

Dave Hart writes:
> I believe it had more to do with the Color Graphics Adapter circuitry
> needing to operate at NTSC-compatible frequency.

According to my Technical Reference manual the XT and the Portable PC
used a 14.31818MHz crystal.  This was the only crystal on the
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA

More information about the questions mailing list