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From: earle@jplopto.uucp (Greg Earle)
Newsgroups: comp.sys.m68k
Subject: MC68030 & MC68882 now out and available; comparisons with MC68020?
Message-ID: <4733@elroy.Jpl.Nasa.Gov>
Date: Thu, 29-Oct-87 00:51:53 EST
Article-I.D.: elroy.4733
Posted: Thu Oct 29 00:51:53 1987
Date-Received: Tue, 3-Nov-87 04:39:34 EST
Sender: news@elroy.Jpl.Nasa.Gov
Reply-To: earle@jplopto.JPL.NASA.GOV (Greg Earle)
Organization: Rockwell International, Seal Beach  CA
Lines: 20
Keywords: 68030 68882  68020 68881

The new EDN shows a Motorola VME board with a 20 MHz 68030 and 68882 FPU on
it.  It has 256Kb on board and I believe 2 serial ports and PROM debugger.
Now that it's no longer vaporware, can someone (preferably from Motorola)
comment on the differences between the 68030 and 020, and also the 882 vs. 881?
I know the 68030 has some MMU circuitry on chip, but I heard this can be
disabled.

My initial thoughts were, `A Sun-3/60 uses a 20 MHz 68020, I wonder what it
would take to drop a 68030 in there at the same clock speed to turbo-ize it.'
Since Sun handles their own memory management, that part of the 68030 would
have to be turned off/disabled, but I'm sure there are many other factors
and/or incompatibilities (I don't even know how close the pinouts are), so
I'd like a Shell Answer Grape to enlighten me about them.

Thanx,

	Greg Earle		earle@jplopto.JPL.NASA.GOV
	S(*CENSORED*)t		earle%jplopto@jpl-elroy.ARPA	[aka:]
	Rockwell International	earle%jplopto@elroy.JPL.NASA.GOV
	Seal Beach, CA		...!cit-vax!elroy!smeagol!jplopto!earle