-------- In message <[email protected]>, Bob Camp writes:
>It's most commonly done with things like a Soekris 45xx series board. You >don't need anything very exotic for the frequency conversion. The jitter in >the PC is way worse than what the external chips will be creating. Actually that is _not_ true anymore. Modern CPU's are very finicky about clock jitter because the PLL the frequency up to GHz range. Some of the clock-chips used now discipline a low-UHF range oscillator to the XTAL to cope with this, but most just PLL the frequency up there. >The real question is - what is the "magic frequency" on the particular >mother board you are going to modify? Once upon a time they all were a pretty >predictable 14.xxx MHz. These days, who knows what's going in where It's pretty much still 14.318 Mhz pretty universally. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | 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 -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
