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From: baum@apple.UUCP
Newsgroups: comp.arch
Subject: Re: 64 Vs 32
Message-ID: <598@apple.UUCP>
Date: Mon, 6-Apr-87 16:07:16 EST
Article-I.D.: apple.598
Posted: Mon Apr  6 16:07:16 1987
Date-Received: Wed, 8-Apr-87 04:13:01 EST
Reply-To: baum@apple.UUCP (Allen Baum)
Organization: Apple Computer, Inc.
Lines: 16

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>> ...If you take an IBM 3090 and make it handle all the interrupts
>> itself I suspect it would run about as fast as a 32 micro.
>
>More like an 8-bit micro!  Unless IBM has smuggled in some improvements
>in their newer machines, the 360/370/... interrupt system is dreadful.
>("Vectors?  What are they?")

Interestingly enough, the channel processors on a 3090 are reputed to be the
infamous 801 processor. It would not be out of the question to see LARGE pieces
of the interrupt handling code to 'migrate' in that direction, making it yet
harder for the clones to follow suit.

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