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From: rav@goanna.cs.rmit.edu.au (Robin Vowels)
Subject: Re: Exception Handling
Date: 1996/09/23
Message-ID: <525m1s$jvh@goanna.cs.rmit.edu.au>#1/1
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references: <323750EA.167E@maths.usyd.edu.au>
 <51jtet$16qc@watnews1.watson.ibm.com>
organization: Comp Sci, RMIT, Melbourne, Australia
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 comp.object,comp.lang.java.tech,comp.lang.c++,comp.lang.ada,comp.lang.asm370,comp.lang.pl1
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Date: 1996-09-23T00:00:00+00:00
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	ncohen@watson.ibm.com (Norman H. Cohen) writes:

	>In article <323750EA.167E@maths.usyd.edu.au>, Robbie Gates
	><robbie@maths.usyd.edu.au> writes: 

	>|> Where did the concept of exception handling originate ? For example,
	>|> which languages were first to support this, or which papers first
	>|> proposed exception handling ?

The IBM System 360 (c. 1965) had an interrupt system that could
trap a range of computational conditions (division by
zero, floating-point overflow, fixed-point overflow,
floating-point underflow, loss of signficance, etc.
Such exceptions could be trapped by the OS, and a few
could be trapped by the user.  Such things
as protection exceptions were trapped by the OS.

Operating system service was initiated with an interrupt
generated by a user instruction SVC (SVC = SuperVisor Call).

THe S/360 probably extended the idea considerably over
what had appeared before.

Before that (c. 1961), the Burroughs B series would have
had protection and array subscript bound checking and whatever
else.  Perhaps someone can add something for that or other systems....