Re: ZIP 16Mhz?????

[dpfarrer@CAP.GWU.EDU (Daniel Pfarrer)]

Thanks for all who helped! I've already ordered a ZIP 9/64k from TMS.


                                                -Daniel Pfarrer
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On 12 Jan 1994, Jonathan Pratt wrote:

> fmlin@netcom.com (Frank M. Lin) writes:
> > >Money is no problem to me. Could you explain these "Crystals" a little more?
> > 
> > Just get a different speeds of crystal oscillators to play around with.
> > The Zip you get may or maybe not work at full 16 mHz...  Play around with
> > 15, 13.75, 12.5... etc.  They all do atleast 12 mHz.
> 
> hmmm...   Actually the zip requires a xcrystal oscillator which is four
> times the speed of the processor  (the extra cycles are used for the
> custom IC to determine whether the data is in cache or not).  So then you
> need a crystal of 60 MHz to run your zip at 15 MHz (and so on).
> 
> cheers
> ntt@cleese.apana.org.au