Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/17/84 chuqui version 1.7 9/23/84; site nsc.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!nsc!chuqui
From: chuqui@nsc.UUCP (Chuq Von Rospach)
Newsgroups: net.micro.mac,net.micro.68k
Subject: Re: Possible Mac Upgrade Questions
Message-ID: <2298@nsc.UUCP>
Date: Thu, 31-Jan-85 14:32:40 EST
Article-I.D.: nsc.2298
Posted: Thu Jan 31 14:32:40 1985
Date-Received: Sat, 2-Feb-85 01:03:17 EST
References: <227@eneevax.UUCP>
Reply-To: chuqui@nsc.UUCP (Chuq Von Rospach)
Distribution: net
Organization: The Village
Lines: 24
Xref: watmath net.micro.mac:516 net.micro.68k:550
Summary: 

In article <227@eneevax.UUCP> ravi@eneevax.UUCP (Ravi Kulkarni) writes:
>I was wondering how hard it would be to replace the 68k on the
>mac with a little board that would contain a 68020,fpu and mmu
>and plug into the 68k socket. I don't think interfacing the
>68020 would be that hard since it has dynamic bus sizing. Is
>there a chip set available for the 68k series equivalent to the
>3 chip set offered by national in it's 32000 series, namely the
>demand paged mmu, and floating point unit and cpu unit? I would
>be interested in knowing some of the technical issues involved
>in trying to put this in a mac both hardware and software wise.
>One other question is how much improvement can be expected by
>just replacing the 68000 with the 68020 at the same clock rate
>and maintaining the 16 bit bus?
>

The 68020 replacement question was handled by Lon Poole in this months
Macworld. Rather than type it in, I refer you to his column...

chuq
-- 
From the ministry of silly talks:               Chuq Von Rospach
{allegra,cbosgd,hplabs,ihnp4,seismo}!nsc!chuqui nsc!chuqui@decwrl.ARPA

Life, the Universe, and lots of other stuff  is a trademark of AT&T Bell Labs