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From: grr@cbmvax.UUCP (George Robbins)
Newsgroups: comp.sys.amiga
Subject: Re: 14.31818 MHz 68010 Upgrade
Message-ID: <2201@cbmvax.UUCP>
Date: Mon, 10-Aug-87 23:35:55 EDT
Article-I.D.: cbmvax.2201
Posted: Mon Aug 10 23:35:55 1987
Date-Received: Wed, 12-Aug-87 05:22:37 EDT
References: <19965@ucbvax.BERKELEY.EDU> <2184@cbmvax.UUCP> <20005@ucbvax.BERKELEY.EDU>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Distribution: na
Organization: Commodore Technology, West Chester, PA
Lines: 26

In article <20005@ucbvax.BERKELEY.EDU> robinson@renoir.Berkeley.EDU.UUCP (Michael Robinson) writes:
>In article <2184@cbmvax.UUCP> George Robbins write:
>>In article <19965@ucbvax.BERKELEY.EDU> I write:
>>> I have located part numbers and suppliers for a circuit which will deliver
>>> an exactly doubled, crystal controlled, syncronized clock signal to a 
>>> 16MHz 68010 sitting on a daughter board in the processor socket.
>>	I am not familiar with a 68010 board of this description, however
>>	there are some common issues to consider.
>Sorry if I wasn't clear.  The circuit does not exist yet, but will if I 
>decide to make it.

Uh, minor technical issue:  where are you going to get these 16 MHz 68010
parts from?  The Motorola folks were by today an I asked them what the
status of fast 16 bit parts was at the present.  They indicated that 12 MHz
was the top speed for both the 68000 and 68010, although there was some chance
that they might offer a ~16 MHz version of the CMOS 68HC000 sometime in the
future.

Now of course there's a pretty good chance you can get some some of the
12 MHz parts to clock at 14 MHz with reasonable reliability, but the timing
margins won't be the best.

-- 
George Robbins - now working for,	uucp: {ihnp4|seismo|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)