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From: steve@thelake.mn.org (Steve Yelvington)
Newsgroups: comp.sys.atari.st,comp.sys.atari.st.tech
Subject: Re: how about an upgrade to 68010
Message-ID: <A1444681262@thelake.mn.org>
Date: 14 Jan 91 16:48:56 GMT
Followup-To: comp.sys.atari.st
Lines: 19

[tony@tacky.cs.olemiss.ed writes ... ]

> I looked through ST Internals and found some MOVE SR type instructions, in
> the boot-up sequence, which are privileged on the '010, and not on the '000.
> 
> Now, I want to know if its my silly TOS version, that is, 1.0, which causes
> this problem, and if it's been fixed for TOS 1.2 or 1.4.

The Jan/Feb issue of Atari Explorer says TT TOS includes an exception-handler
in the BIOS that traps this error and replaces it with a move from CCR.
Apparently TOS ROMs are not the only software with this instruction.

(I don't know whether TOS 1.4 and 1.6 have this error-handling, or whether
they include the offending instruction.)

----
  Steve Yelvington / P. O. Box 38 / Marine on St. Croix, MN 55047 USA
  Editor of the MAST (Minnesota Atari ST Users) newsletter - $15/year
  INTERNET: steve@thelake.mn.org    UUCP: plains!umn-cs!thelake!steve