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From: max@plus5.UUCP (R. Max Mutrux)
Newsgroups: net.micro.amiga,net.micro.68k
Subject: Re: Amiga shown with 68020
Message-ID: <930@plus5.UUCP>
Date: Wed, 27-Nov-85 11:12:09 EST
Article-I.D.: plus5.930
Posted: Wed Nov 27 11:12:09 1985
Date-Received: Thu, 28-Nov-85 08:02:14 EST
References: <310@amiga.amiga.UUCP> <238@mips.UUCP>
Organization: Plus Five Computer Services, St. Louis
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Xref: watmath net.micro.amiga:865 net.micro.68k:1370

> Sounds like it could make the Amiga into a SuperAmiga!  Now if we could
> just clock the thing at 16.7MHz (or even 12.5MHz).  I suspect that that
> is a bit too tough to do though, since the 7.159+MHz clock is so intimately
> tied to the video display, etc;  besides, who knows what the AmigaBus and
> the custom chips can handle?  Of course the lack of an MMU becomes more of
> a liability now, but it should still end up being quite a machine.

As long as Amiga didn't do anything wanky like counting on the AS-DS delays
or the DS-/AS delays you should be able to supply the 68020 with a "private"
clock source. And since the 680xx is an async design when it goes outside
of the private 256k ram it should slow down. When I get my tech specs
on the amiga I'll check this out. I want to put the 20MHz 68020 on my amiga
and then run Drystone 24 hours a day.

Also for general info. CSA is using BIG static rams on there 68020/w 256k
board so don't think you can just change those 64k chips to 256k chips
and have a meg.

-- 
		(char)Max_Mutrux	..!{ihnp4,cbosgd,seismo}!plus5!max