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From: hsgj@batcomputer.TN.CORNELL.EDU (Dan Green)
Newsgroups: net.micro.amiga
Subject: Re: How to prevent system death from errors in user code?
Message-ID: <393@batcomputer.TN.CORNELL.EDU>
Date: Fri, 6-Jun-86 00:17:59 EDT
Article-I.D.: batcompu.393
Posted: Fri Jun  6 00:17:59 1986
Date-Received: Sat, 7-Jun-86 13:58:25 EDT
References: <8605310909.AA00952@pavepaws> <1265@utcs.uucp>
Reply-To: hsgj@batcomputer.UUCP (Dan Green)
Organization: Theory Center, Cornell University, Ithaca NY
Lines: 30

In article <1265@utcs.uucp> wagner@utcs.UUCP (Michael Wagner) writes:
>In article <8605310909.AA00952@pavepaws> dillon@PAVEPAWS.BERKELEY.EDU (Matt Dillon) writes:
>>
>>	Unfortunetly, since the Amiga does not have an MMU, an error in
>>a user program is more likely to overwrite vital system storage (or other
>>user programs).  
>>					-Matt
>>

I was really impressed with the Amiga's software protection.  This 
evening I compiled a program, and ran it - it immediately gave a 
requester saying "Please finish all disk activity before I blow up
your machine(sic)" and when I pressed CANCEL it put up a Guru meditation
number and the Amiga rebooted.
HOWEVER - After the reboot, I did a newcli and then ran my horribly
buggy program from the newcli.  The result - Again the error requester
window popped up.  BUT, I clicked on the backwindow gadget, got to
my InitialCLI, and WAS ABLE TO DO ANY COMMAND FROM THE INITIAL CLI!
   In other words, the error had effected only the newcli process,
but I could still use my machine from the original CLI.
Avail, of course, reported much
less free memory, but things were still running.   This really impressed
me that with one process completely comatose the others could still
run.  Of course, there is the small problem that my g-d d-mn f-c-i-g
program is not running, but hey - what else is new?

-- 
Dan Green    ARPA: hsgj@vax2.ccs.cornell.edu
~~~~~~~~~    BITNET:  hsgj@cornella
             UUCP:    {decvax,ihnp4,allegra}!cornell!batcomputer!hsgj