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From: gene@cooper.UUCP
Newsgroups: comp.sys.m68k
Subject: Re: 25mhz 68020 price & performance?
Message-ID: <807@cooper.UUCP>
Date: Thu, 2-Apr-87 14:59:48 EST
Article-I.D.: cooper.807
Posted: Thu Apr  2 14:59:48 1987
Date-Received: Sun, 5-Apr-87 01:32:19 EST
References: <18116@ucbvax.BERKELEY.EDU>
Organization: The Cooper Union (NY, NY)
Lines: 24
Summary: 68020 price and performance

In article <18116@ucbvax.BERKELEY.EDU>, robinson@renoir.Berkeley.EDU (Michael Robinson) writes:
> What is the lowest price one might expect to pay for a 25mhz 68020,
> and what are the chances of being able to push one to 28.64mhz?

I'm not sure about the price, but I personally think that you can push the
68020 to at least 28MHz, if not 30MHz or more. I've found that most CPUs are
rated very conservatively to guarantee operation over all specified voltage
and temperature ranges. From my own personal experience, I've used a 2.5MHz
Z80 at 4MHz (something like 4.12...MHz) with no problems. A friend of mine
used an 8MHz 68000 at 12MHz (accidentally or purposely, I don't know) with
no problems either. Again, if you expect wide environmental changes and/or
shaky power supplies (like 4.8V instead of 5.0V because of line drops, etc.)
then only use it at the rated frequency.

					Gene

					...!ihnp4!philabs!phri!cooper!gene

	"Mourn for us, so pressed with fear.
	 Chained and shackled, we all found
	 Freedom choked, in dread we lived
	 Since Tyrant was enthroned."

				- RJAH