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Groups > alt.folklore.computers > #212510
| From | Dan Espen <dan1espen@gmail.com> |
|---|---|
| Newsgroups | alt.folklore.computers |
| Subject | Re: IBM models 91, 195 & CDC 7600 |
| Date | 2020-08-02 18:50 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <rg7fv7$u18$1@dont-email.me> (permalink) |
| References | (7 earlier) <922c973a-7fcb-4c6e-9691-7996ae938db5o@googlegroups.com> <317348782.617983032.989774.peter_flass-yahoo.com@news.eternal-september.org> <1e4a1301-dad0-445b-bc20-6c084cbc59c2o@googlegroups.com> <rg434c$pa2$1@dont-email.me> <rg7cug023qp@news2.newsguy.com> |
Charlie Gibbs <cgibbs@kltpzyxm.invalid> writes: > On 2020-08-01, Dan Espen <dan1espen@gmail.com> wrote: > >> robin.vowels@gmail.com writes: >> >>> On Sunday, August 2, 2020 at 12:00:54 AM UTC+10, Peter Flass wrote: >>> >>>> I don’t think I found much need to increment a word in memory. For >>>> indexing the value would be kept in a register, or would have to be >>>> loaded before use anyhow. >>> >>> There is a limited number of registers. >>> >>> When tallying a number of variables (including separate elements of an >>> array), incrementing a memory word would be very handy. >>> >>> Even if, for normal indexing, a variable need to be loaded for that >>> purpose, it would still be more economical to increment memory, then >>> load it to register for indexing (2 instructions instead of 3). > > Still, there are tricks for conserving registers. You can get away > with using registers 15, 0, and 1 in a BXLE loop, for instance. > >> Seems to me, I've seen more than 1 page counter declared as binary. >> Because every one knows binary arithmetic is more efficient. >> >> :) > > As opposed to the CS weenie who wrote a COBOL program full of > subscript handling, and declared all the subscripts as COMP-3. I was assigned to a project at an insurance company as a consultant. The client had a large COBOL program to do some heavy statistics calculations. They checked the IBM documentation on coding rules. Some of the rules: Name all constants. Keep all fields the same size. Keep everything the same usage, packed. So, they had some big numbers, so they made all fields S9(7)V9(5). They named constants like this: 01 ONE PIC S9(7)V9(5) COMP-3 VALUE 1. There were lots of calculations with reciprocals like this: DIVIDE ONE BY VAR-NAME GIVING RESULT-NAME. The programmer was pretty bright, just mislead.. I took a quick look at the generated assembler code and just about every calculation converted packed to float and back again. They didn't have the floating point feature installed, all the calculations were done in library routines. Full test runs took days. Even their tiny sample data test took hours. I got rid of all the crap and submitted a test. The operator wrote on the test results that the job didn't run. It ran fine, it only took a few seconds. Good times. -- Dan Espen
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DEC Iron Spring Software <Peter_Flass@Yahoo.com> - 2020-07-24 09:38 -0700
Re: DEC Mike Spencer <mds@bogus.nodomain.nowhere> - 2020-07-24 17:12 -0300
Re: DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-24 17:14 -0400
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-24 19:43 -0700
Re: DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-24 23:28 -0400
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 02:06 -0700
Re: DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-25 05:27 -0400
Re: DEC Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-25 10:58 +0100
Re: 360 PCs was DEC John Levine <johnl@taugh.com> - 2020-07-25 17:21 +0000
Re: 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-25 13:54 -0400
Re: 360 PCs was DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-25 14:43 -0700
Re: 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-25 18:05 -0400
Re: 360 PCs was DEC Dan Espen <dan1espen@gmail.com> - 2020-07-25 20:27 -0400
Re: 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-25 21:08 -0400
Re: 360 PCs was DEC Dan Espen <dan1espen@gmail.com> - 2020-07-25 23:29 -0400
Re: 360 PCs was DEC Dan Espen <dan1espen@gmail.com> - 2020-07-25 23:30 -0400
Re: 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-26 00:06 -0400
Re: 360 PCs was DEC Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-08-05 06:06 +0000
Re: 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-07 10:19 -0400
Re: 360 PCs was DEC Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-08-07 20:01 +0000
Re: wiki software, not 360 PCs was DEC John Levine <johnl@taugh.com> - 2020-08-07 22:45 +0000
Re: wiki software, not 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-08 13:35 -0400
Re: wiki software, not 360 PCs was DEC Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-08-09 15:33 +0000
Re: wiki software, not 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-09 13:16 -0400
Re: wiki software, not 360 PCs was DEC Dan Espen <dan1espen@gmail.com> - 2020-08-09 15:00 -0400
Re: wiki software, not 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-09 18:35 -0400
Re: wiki software, not 360 PCs was DEC maus <maus@dmaus.org> - 2020-08-10 23:10 +0000
Re: wiki software, not 360 PCs was DEC Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-08-09 19:18 +0000
Re: wiki software, not 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-09 18:40 -0400
Re: wiki software, not 360 PCs was DEC Peter Flass <peter_flass@yahoo.com> - 2020-08-09 15:30 -0700
Re: 360 PCs was DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-25 18:39 -0700
Re: 360 PCs was DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-25 18:43 -0700
Re: 360 PCs was DEC Dan Espen <dan1espen@gmail.com> - 2020-07-25 23:32 -0400
Re: 360 PCs was DEC John Levine <johnl@taugh.com> - 2020-07-26 21:45 +0000
Re: 360 PCs was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-26 18:01 -0400
Re: 360 PCs was DEC Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-27 06:38 +0100
Re: 360 PCs was DEC John Levine <johnl@taugh.com> - 2020-07-26 01:24 +0000
Re: 360 PCs was DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-25 18:39 -0700
Re: 360 PCs was DEC Bob Eager <news0073@eager.cx> - 2020-07-26 20:18 +0000
Re: 360 PCs was DEC Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-25 19:39 +0100
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 12:50 -0700
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 02:26 -0700
Re: DEC usenet@only.tnx (Questor) - 2020-07-26 19:23 +0000
Re: DEC Thomas Koenig <tkoenig@netcologne.de> - 2020-07-26 21:05 +0000
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-26 16:23 -0700
Re: DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-26 21:24 -0400
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-27 11:42 -0700
Re: DEC archaeology John Levine <johnl@taugh.com> - 2020-07-27 02:41 +0000
Re: DEC archaeology Andy Burns <usenet@andyburns.uk> - 2020-07-27 07:37 +0100
Re: DEC archaeology Thomas Koenig <tkoenig@netcologne.de> - 2020-07-27 07:10 +0000
Re: DEC archaeology Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-27 09:03 +0100
Re: DEC archaeology Michael LeVine <mlevinespmfltr@redshift.com> - 2020-07-27 02:09 -0700
Re: DEC archaeology Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-27 11:27 +0100
Origin of Niven/Pournelle quips (was: DEC archaeology) Thomas Koenig <tkoenig@netcologne.de> - 2020-07-27 12:22 +0000
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Rich Alderson <news@alderson.users.panix.com> - 2020-07-27 20:51 -0400
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-28 06:02 +0100
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Bob Eager <news0073@eager.cx> - 2020-07-28 08:29 +0000
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-07-28 17:30 +0000
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) djheydt@kithrup.com (Dorothy J Heydt) - 2020-07-28 18:18 +0000
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Bob Eager <news0073@eager.cx> - 2020-07-28 19:57 +0000
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-28 21:32 +0100
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) djheydt@kithrup.com (Dorothy J Heydt) - 2020-07-28 21:34 +0000
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) J. Clarke <jclarke.873638@gmail.com> - 2020-07-28 18:33 -0400
Re: Origin of Niven/Pournelle quips (was: DEC archaeology) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-28 20:55 +0100
Re: DEC archaeology John Levine <johnl@taugh.com> - 2020-07-27 14:53 +0000
Re: DEC archaeology drb@ihatespam.msu.edu (Dennis Boone) - 2020-07-27 11:30 -0500
Re: DEC archaeology scott@slp53.sl.home (Scott Lurndal) - 2020-07-27 16:37 +0000
Re: DEC archaeology drb@ihatespam.msu.edu (Dennis Boone) - 2020-07-28 10:24 -0500
Re: DEC archaeology scott@slp53.sl.home (Scott Lurndal) - 2020-07-28 15:59 +0000
Re: DEC archaeology Peter Flass <peter_flass@yahoo.com> - 2020-07-27 11:42 -0700
Re: DEC archaeology J. Clarke <jclarke.873638@gmail.com> - 2020-07-27 18:47 -0400
Re: DEC archaeology Quadibloc <jsavard@ecn.ab.ca> - 2020-07-27 17:43 -0700
Re: DEC usenet@only.tnx (Questor) - 2020-07-28 03:21 +0000
Re: DEC Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-07-28 17:30 +0000
Re: ou sont les ordinateurs d'antan, was DEC John Levine <johnl@taugh.com> - 2020-07-28 20:27 +0000
Re: ou sont les ordinateurs d'antan, was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-07-28 18:53 -0400
Re: ou sont les ordinateurs d'antan, was DEC Gareth Evans <headstone255@yahoo.com> - 2020-07-29 10:36 +0100
Re: ou sont les ordinateurs d'antan, was DEC Andreas Eder <a_eder_muc@web.de> - 2020-08-02 12:55 +0200
Re: ou sont les ordinateurs d'antan, was DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-02 12:49 -0400
Re: ou sont les ordinateurs d'antan, was DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-29 14:08 -0700
Re: ou sont les ordinateurs d'antan, was DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-29 14:04 -0700
Re: DEC Louis Krupp <lkrupp@invalid.pssw.com.invalid> - 2020-07-30 03:49 -0600
Re: DEC scott@slp53.sl.home (Scott Lurndal) - 2020-07-30 14:41 +0000
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-30 10:12 -0700
Re: DEC scott@slp53.sl.home (Scott Lurndal) - 2020-07-30 18:40 +0000
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-07-30 12:02 -0700
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-07-31 02:38 -0700
Re: DEC large computers John Levine <johnl@taugh.com> - 2020-07-31 20:21 +0000
Re: DEC large computers Thomas Koenig <tkoenig@netcologne.de> - 2020-07-31 23:23 +0000
Re: DEC large computers J. Clarke <jclarke.873638@gmail.com> - 2020-07-31 21:13 -0400
Re: DEC large computers Thomas Koenig <tkoenig@netcologne.de> - 2020-08-01 10:39 +0000
Re: vectors, was DEC large computers John Levine <johnl@taugh.com> - 2020-08-01 02:21 +0000
Re: vectors, was DEC large computers Bob Eager <news0073@eager.cx> - 2020-08-01 11:14 +0000
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-07-31 20:30 -0700
Re: IBM models 91, 195 & CDC 7600 Dan Espen <dan1espen@gmail.com> - 2020-08-01 00:00 -0400
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 02:20 -0700
Re: IBM models 91, 195 & CDC 7600 Peter Flass <peter_flass@yahoo.com> - 2020-08-01 07:00 -0700
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 08:18 -0700
Re: IBM models 91, 195 & CDC 7600 Dan Espen <dan1espen@gmail.com> - 2020-08-01 11:52 -0400
Re: IBM models 91, 195 & CDC 7600 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-08-02 21:58 +0000
Re: IBM models 91, 195 & CDC 7600 Dan Espen <dan1espen@gmail.com> - 2020-08-02 18:50 -0400
Re: IBM models 91, 195 & CDC 7600 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-08-03 18:23 +0000
Re: IBM models 91, 195 & CDC 7600 Peter Flass <peter_flass@yahoo.com> - 2020-08-03 13:34 -0700
Re: IBM models 91, 195 & CDC 7600 Quadibloc <jsavard@ecn.ab.ca> - 2020-08-01 00:55 -0700
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 02:27 -0700
Re: IBM models 91, 195 & CDC 7600 John Levine <johnl@taugh.com> - 2020-08-01 17:27 +0000
Re: IBM models 91, 195 & CDC 7600 Peter Flass <peter_flass@yahoo.com> - 2020-08-01 12:11 -0700
Re: IBM models 91, 195 & CDC 7600 Bob Eager <news0073@eager.cx> - 2020-08-01 19:56 +0000
Re: IBM models 91, 195 & CDC 7600 John Levine <johnl@taugh.com> - 2020-08-01 20:18 +0000
Re: IBM models 91, 195 & CDC 7600 Bob Eager <news0073@eager.cx> - 2020-08-01 23:42 +0000
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 20:32 -0700
Re: IBM models 91, 195 & CDC 7600 Gerard Schildberger <gerard46@rrt.net> - 2020-08-02 12:58 -0700
Re: IBM models 91, 195 & CDC 7600 J. Clarke <jclarke.873638@gmail.com> - 2020-08-01 16:28 -0400
Re: IBM models 91, 195 & CDC 7600 David Lesher <wb8foz@panix.com> - 2020-08-02 20:42 +0000
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 20:27 -0700
Re: IBM models 91, 195 & CDC 7600 Quadibloc <jsavard@ecn.ab.ca> - 2020-08-02 00:28 -0700
Re: IBM models 91, 195 & CDC 7600 Thomas Koenig <tkoenig@netcologne.de> - 2020-08-02 08:01 +0000
Re: IBM models 91, 195 & CDC 7600 Quadibloc <jsavard@ecn.ab.ca> - 2020-08-03 16:47 -0700
Re: IBM models 91, 195 & CDC 7600 Quadibloc <jsavard@ecn.ab.ca> - 2020-08-03 19:45 -0700
Re: IBM models 91, 195 & CDC 7600 Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2020-08-03 21:00 -0600
Re: IBM models 91, 195 & CDC 7600 scott@slp53.sl.home (Scott Lurndal) - 2020-08-02 22:45 +0000
Re: IBM models 91, 195 & CDC 7600 Peter Flass <peter_flass@yahoo.com> - 2020-08-03 07:45 -0700
Re: IBM models 91, 195 & CDC 7600 "Kerr-Mudd,John" <notsaying@127.0.0.1> - 2020-08-01 08:24 +0000
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 02:30 -0700
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 02:34 -0700
Re: DEC large computers Quadibloc <jsavard@ecn.ab.ca> - 2020-08-01 00:51 -0700
Re: DEC large computers robin.vowels@gmail.com - 2020-08-01 02:23 -0700
Jupiter alternatives [was Re: DEC] Rich Alderson <news@alderson.users.panix.com> - 2020-07-31 21:16 -0400
Re: Jupiter alternatives [was Re: DEC] Robert Swindells <rjs@fdy2.co.uk> - 2020-08-01 01:56 +0000
Re: Jupiter alternatives [was Re: DEC] Adam Sampson <ats@offog.org> - 2020-08-01 15:59 +0100
Re: Jupiter alternatives [was Re: DEC] Rich Alderson <news@alderson.users.panix.com> - 2020-08-01 22:09 -0400
Re: Jupiter alternatives [was Re: DEC] Rich Alderson <news@alderson.users.panix.com> - 2020-08-01 22:07 -0400
Re: DEC usenet@only.tnx (Questor) - 2020-08-03 00:32 +0000
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-02 23:54 -0700
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-08-03 07:45 -0700
Re: DEC robin.vowels@gmail.com - 2020-08-03 09:16 -0700
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-08-03 10:10 -0700
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-08-03 10:35 -0700
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-03 11:28 -0700
Re: DEC Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-08-03 21:26 +0000
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-08-03 16:38 -0700
Re: DEC Dan Espen <dan1espen@gmail.com> - 2020-08-03 21:44 -0400
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-03 23:55 -0700
Re: DEC Dan Espen <dan1espen@gmail.com> - 2020-08-04 08:05 -0400
Re: DEC J. Clarke <jclarke.873638@gmail.com> - 2020-08-04 08:59 -0400
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-04 06:29 -0700
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-08-04 07:48 -0700
Re: DEC Niklas Karlsson <anksil@yahoo.se> - 2020-08-05 04:13 +0000
Re: DEC robin.vowels@gmail.com - 2020-08-04 22:45 -0700
Re: DEC JimP <chucktheouch@gmail.com> - 2020-08-05 12:33 -0500
Re: DEC "Kerr-Mudd,John" <notsaying@127.0.0.1> - 2020-08-05 19:31 +0000
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-04 22:57 -0700
Re: DEC Bob Eager <news0073@eager.cx> - 2020-08-05 08:13 +0000
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-08-05 10:58 -0700
Re: DEC drb@ihatespam.msu.edu (Dennis Boone) - 2020-08-05 13:28 -0500
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-06 16:21 -0700
Re: DEC Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-08-03 18:23 +0000
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-03 11:31 -0700
Re: DEC danny burstein <dannyb@panix.com> - 2020-08-03 18:38 +0000
Re: DEC "m. thompson" <michael.99.thompson@gmail.com> - 2020-08-04 05:38 -0700
Re: DEC Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-08-04 18:54 +0000
Re: DEC usenet@only.tnx (Questor) - 2020-08-03 00:32 +0000
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-07-30 13:29 -0700
Re: DEC usenet@only.tnx (Questor) - 2020-07-30 20:27 +0000
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