-------- In message <ep0d0ctbrovmisvj43j57ns6smt606t...@4ax.com>, Gary Woods writes: >On Tue, 18 Oct 2016 16:53:15 +0200, you wrote: > >>14.317 MHz quartz. Such frequency is a relic of original PC design > >It's 4X the color subcarrier frequency in NTSC (originally U.S.) >television; rapidly becoming a dinosaur. I'm sure it was used in computers >to make color video easier. Newer boards doubtless use much faster clocks >and synthesize what the parts need.
It's 14.3181818 MHz and it has a most facinating history - if you care for that sort of thing: https://en.wikipedia.org/wiki/Colorburst#Rationale_for_NTSC_Color_burst_frequency -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.