At 20:30 -0800 on 05/04/03, Alan O'Neil wrote:

>My friend wishes to OC one of his many Mac Classics. It has been stated
>somewhere that this is near impossible because ALL the I/O circuitry is
>tied to thr processor. I've heard that it's been done (and stable) up to
>and around 10MHz though. He has a 24MHz oscillator (to get 12MHz out of the
>68000) in his hand and wants to try this out. Will he break anything by
>testing it? BTW, his oscillator is the smaller, two-pin type, not the
>larger 4-pin or whatever type.

That osciallator is gonna cause problems, most likely.  Get a 4-pin one.  Steal
one from a IIsi or LC II; there are plenty of crystal oscillators in the proper
package with the right frequency range.

I don't expect the video signal to work particularly well, and I'd be surprised
if the floppy drive and serial ports still work, but everything else might be
all right.
-- 

the pickle

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