Path: utzoo!attcan!uunet!mcsun!hp4nl!philapd!ssp11!dolf
From: dolf@idca.tds.PHILIPS.nl (Dolf Grunbauer)
Newsgroups: comp.sys.m68k
Subject: Re: 68040 not object code compatible?
Message-ID: <668@ssp11.idca.tds.philips.nl>
Date: 2 Mar 90 10:45:21 GMT
References: <300003@hpclkms.HP.COM> <9816@cbmvax.commodore.com> <4999@scolex.sco.COM> <2446@motaus.UUCP>
Organization: Philips Information Systems, Apeldoorn, The Netherlands
Lines: 19


Another point is that the MC68040 doesn't support co-processors anymore.
The MMU & FP are on-chip but there is no external interface to another
(custom made and/or proprietary) co-processor. Isn't this a problem ?
Or was the co-processor interface only for one customer which decided
later on not to use it (as with the CALLM/RTM) ?
I do not know of any co-processor other than MC68851, MC68881/MC68882
but it could be possible they exist (like a complex co-processor,
graphics or X/Window co-processor).
On the other hand I once heard of a system which used more than one
MC68881 (so each process has its own MC68881, thus saving the context
saving on a process context switch).


-- 
Dolf Grunbauer          Tel: +31 55 433233  Internet dolf@idca.tds.philips.nl
Philips Telecommunication and Data Systems  UUCP ....!mcvax!philapd!dolf
Dept. SSP, P.O. Box 245, 7300 AE Apeldoorn, The Netherlands         n   n   n
It's a pity my .signature is too small to show you my solution of  a + b = c