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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.arch
Subject: Re: except what, is Vax addressing sane today
Date: Sun, 22 Sep 2024 01:41:47 +0300
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On Sat, 21 Sep 2024 22:14:12 -0000 (UTC)
John Levine <johnl@taugh.com> wrote:

> According to MitchAlsup1 <mitchalsup@aol.com>:
> >In the days before <good> branch prediction having a conditional
> >branch after each instruction that could have an execution problem
> >was an extremely poor choice. Thus, exceptions were invented (circa
> >1958).  
> 
> Oh, it was worse than that.  There were instructions like "Divide or
> Halt" which stopped the computer with an error light on a zero divide.
> 
> >Many (most, nearly all) processor architectures have notoriously
> >bad exception delivery to a point of control that can deal with
> >the problem at hand.  
> 
> Some of us remember imprecise itnterrupts and the OS/360 S0C0
> completion code.
> 
> But you are in general right, it makes more sense to keep the computer
> running in the normal case and provide slow ways to recover from
> failures and do something else.
> 

Where is Nick to tell you that any attempt of recovery is a Bad Idea.