I just checked, and it looks like even the original 8088 IBM PC had a 14.318 MHz oscillator on it. And it's also one of the ISA bus signals.
Rich AC7MA On 4/24/2011 10:17 PM, Kevin Rock wrote: > Which crystal frequency did they use on the IBM PCs before the AT came out? > Kevin. KD5ONS > > > > On Sun, 24 Apr 2011 22:09:17 -0700, Rich Heineck<[email protected]> > wrote: > >> 14.318 Mhz has been widely used on PC motherboards going back to the >> original IBM PC-AT. >> That would be high on my list of suspicious sources. >> >> 73, >> Rich AC7MA > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
