Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcso!hplisa!hplvli!boyne
From: boyne@hplvli.HP.COM (Art Boyne)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Was - Re: Xerox sues Apple!!! Now processor wars.
Message-ID: <360025@hplvli.HP.COM>
Date: 3 Jan 90 16:21:49 GMT
References: <899@lzaz.ATT.COM>
Organization: Loveland Inst. Div
Lines: 15

bds@lzaz.ATT.COM (Bruce Szablak) writes:

>More importantly, will my 68000 software run on a 68020, 68030, 68040 etc?
>Sometimes yes, sometimes no...

It should, with one *important* exception: exception handling.  The length and
contents of the stack frame created by an exception (bus/address errors,
interrupts, traps, etc.) changed between the 68000 and the 68010.  Any code
that handles 68000-style exception stack frames has to be modified to run
on a 68010 or later.

This would mean that any code that handles raw interrupts will not run
unchanged.

Art Boyne, boyne@hplvla.hp.com