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From: chi@tybalt.caltech.edu (Curt Hagenlocher)
Newsgroups: comp.sys.m68k
Subject: Math, memory chips for 68030
Message-ID: <3792@cit-vax.Caltech.Edu>
Date: Thu, 27-Aug-87 19:53:40 EDT
Article-I.D.: cit-vax.3792
Posted: Thu Aug 27 19:53:40 1987
Date-Received: Sat, 29-Aug-87 12:26:10 EDT
References: none
Sender: news@cit-vax.Caltech.Edu
Reply-To: chi@tybalt.caltech.edu (Curt Hagenlocher)
Followup-To: comp.sys.m68k
Organization: California Institute of Technology
Lines: 22
Keywords: 68030 68851 68881
Summary: New ones?

I  understand that the 68030 has a  subset of the 68851  instructions on
the chip.  Will the 68030 work with  the 68851?  Or is the subset enough
to implement all the necessary paging functions?   If not, will Motorola
be releasing an (updated) version of the 68851 to work with 68030?

I read the other day (I can't remember offhand in which journal) an item
concerning math chips, and it appears that, although the  68881 has more
functions than the 80387, it's takes 125 - 150% as long to complete some
tasks.  Will Motorola be releasing a new math chip with the '030?

I would appreciate it it someone could send me the answers to my queries
as it could affect a personal project I'm working on.  Or maybe it would
be worthwhile to post the replies: I'm sure that other people would like
to know the answers as much as I would.

Thank you.

++++++++++++++++++++++++++++++++++++++++++++
Curt Hagenlocher
chi@tybalt.caltech.edu
chi@citromeo.caltech.bitnet
seismo!cit-vax!tybalt.caltech.edu!chi