Re: IBM 9020 FAA/ATC Systems from 1960's

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#210957

From: jcmo... Joe Morris
Date: Tue, 21 Aug 2001 15:12

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"Chris Bigos" <Chris...@COLDmail.com> writes:

>I've now checked and the standard and 9020 processors had the *same* ROS
>address space. Where did the room for the extra instructions come from?
>There must have been a lot of unused ROS addresses in the standard 360-65. I
>know there were a few in the 9020 (all zeroes with good parity).

Recall that the /65 had numerous extra-cost features such as 709x
emulation; since I doubt that the 9020 boxes needed to pretend to
be an old 709x machine that address space would have been available
for use.

Of course, the extra goodies in the 9020 would require additional ROS
planes, but it wouldn't necessarily have required expanding the
address space available to them.

Joe Morris

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<7HU77.9333$TM5.980906@typhoon.southeast.rr.com> <memo.20010727094436.36989A@mikekingston.compulink.co.uk> <vd2NzVOTNb7v-pn2-vdi55dTSr5Cy@dialup-63.208.164.65.Dial1.Washington2.Level3.net> <jwU87.26231$J37.6143999@typhoon.southeast.rr.com> <vd2NzVOTNb7v-pn2-S9FIPi2udxUW@dialup-63.208.164.94.Dial1.Washington2.Level3.net> <9k3oan$t35$1@top.mitre.org> <vd2NzVOTNb7v-pn2-kRuq3Z30rY3O@dialup-209.244.87.87.Dial1.Washington2.Level3.net> <9l0m6j$la3$1@top.mitre.org> <K2Tc7.108947$TM5.16755795@typhoon.so

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From: jcmo...@mitre.org (Joe Morris)
Newsgroups: alt.folklore.computers
Subject: Re: IBM 9020 FAA/ATC Systems from 1960's
Date: 21 Aug 2001 15:12:01 GMT
Organization: The MITRE Corporation
Lines: 17
Message-ID: <9ltto1$42m$1@top.mitre.org>
References: <7HU77.9333$TM5.980906@typhoon.southeast.rr.com> <memo.20010727094436.36989A@mikekingston.compulink.co.uk> <vd2NzVOTNb7v-pn2-vdi55dTSr5Cy@dialup-63.208.164.65.Dial1.Washington2.Level3.net> <jwU87.26231$J37.6143999@typhoon.southeast.rr.com> <vd2NzVOTNb7v-pn2-S9FIPi2udxUW@dialup-63.208.164.94.Dial1.Washington2.Level3.net> <9k3oan$t35$1@top.mitre.org> <vd2NzVOTNb7v-pn2-kRuq3Z30rY3O@dialup-209.244.87.87.Dial1.Washington2.Level3.net> <9l0m6j$la3$1@top.mitre.org> <K2Tc7.108947$TM5.16755795@typhoon.so
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