PC speed was Re: 8' DSDD disk
ard at p850ug1.demon.co.uk
Mon Jun 6 17:38:32 CDT 2005
> Part of my original point about using 4.77Mhz is that all of the CGA cards I
> ever saw had their own crystals and ignored the MB clock.
Just checked the IBM CGA scheamtics, there is no crystal shown. I've also
just pulled a couple of genuine IBM CGA cards out of my spares box, I
can't see anything that I think is a crystal on them. Ditto for a close
clone of the CGA card that I've just looked at.
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