Subject: Re: New chip in TWGS (sources for oscillators)
From: supertimer@aol.com (Supertimer)
Newsgroups: comp.sys.apple2
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Date: 14 Sep 1999 02:15:30 GMT
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Message-ID: <19990913221530.16328.00004623@ng-fh1.aol.com>


Ok, I found my old DigiKey catalog.  Here are the
part numbers:

CTS Clock Oscillators, Half Size

40Mhz     CTX175-ND     $3.25
50Mhz     CTX176-ND     $3.25
64Mhz     CTX177-ND     $4.45

You can order them at the DigiKey web site at this
URL:  http://www.digikey.com/

An oscillator of a particular Mhz will clock the TWGS
CPU at 1/4 of the oscillator Mhz, so the 50Mhz
oscillator will make the CPU go at 12.5Mhz, for
example.

If price is not an issue, I suggest getting one of each
and experimenting to see what speed the TWGS
tops off at.

If not, I suggest getting the 50Mhz and 40Mhz units.
12.5Mhz TWGS (50Mhz oscillator) almost always
works, but with a 40Mhz unit, you can fall back on
10Mhz operation if necessary.

The 64Mhz oscillator (16Mhz operation) is a bit more
iffy, since cache RAM speeds come into play.  Grab
this oscillator too if you want to experiment, but it
may or may not work.

Good luck!

[Copies posted to email and csa2]