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From: cmcmanis@sun.uucp (Chuck McManis)
Newsgroups: comp.sys.atari.st
Subject: Re: a 68010 for your st?
Message-ID: <15188@sun.uucp>
Date: Tue, 17-Mar-87 15:22:30 EST
Article-I.D.: sun.15188
Posted: Tue Mar 17 15:22:30 1987
Date-Received: Thu, 19-Mar-87 01:34:41 EST
References: <8703062012.AA22292@ucbvax.Berkeley.EDU> <574@tc-fletch.tc.fluke.COM> <682@viper.UUCP>
Organization: Sun Microsystems, Inc. - Mtn View, CA
Lines: 41
Summary: John is mistaken, Amiga's work with '010s

In article <682@viper.UUCP>, john@viper.UUCP (John Stanley) writes:
> I've been discussing this with a small group of Amiga users.  They are having
> the same problems upgrading to 68010's as we are.  Aparently there
> is either an alternate "kick-start" disk for use with 68010 Amigas and/or
> there are some people experimenting with a method of detecting the different
> CPU's and booting the correct Amiga os based on what's in the machine.
> 
>   Either way, it means they have two different operating systems for the
> different cpus.  This is a major problem all users wanting to upgrade are
> going to have to face regardless of the machine (ST or Amiga) they're using.
> 
> --- 
> John Stanley (john@viper.UUCP)
> Software Consultant - DynaSoft Systems
> UUCP: ...{amdahl,ihnp4,rutgers}!{meccts,dayton}!viper!john

John is mistaken, the Amiga will boot with either a 68010 or a 68020
as the main processor. In the first case you simply replace the 68000
chip with an '010 and reboot. In the second you will need the CSA
adapter card since the '020 and '000 are not pin compatible. The
only problem you encounter arises from people using the dreaded
MOV  SR, EA instruction, which *none* of the C compilers generate.
(I understand TDI modula-2 may) There is an O/S function call to 
get the SR in a compatible way no matter what chip is installed.
Also there is a program to install an exception handler for misbehaving
programs but the OS totally and transparently supports the higher
level chips. DRI was exceptionally short sited in not providing that
support in GEM. 

Summary : The Amiga can run '000, '010, and '020 processors without a
change in the O/S or system software. All programs written in C work
also. 

			-- Inews filler.
			-- Inews filler.


-- 
--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.