From: glen herrmannsfeldt g...@ugcs.caltech.edu
Sent: Saturday, 3 September 2011 10:53 AM
As to programming, microcode is now usually considered
firmware, though the term is likely more recent than S/360.
The microcode of most S/360 models was actually hardware,
physical capacitors or
I am out of the office until Tuesday, September 6th 2011.
On Sep 6, 2011, at 05:39, robin wrote:
From: glen herrmannsfeldt g...@ugcs.caltech.edu
Sent: Saturday, 3 September 2011 10:53 AM
As to programming, microcode is now usually considered
firmware, though the term is likely more recent than S/360.
The microcode of most S/360 models was
We are a long way from the edit instruction; and I am not sure that CCROS---It
was in my experience used chiefly for device addresses, which of course
varied/vary from shop to shop---a µprogramming vehicle is not, I think, a good
or even defensible use of words.
CEs or sysprogs did indeed
From: Tony Harminc t...@harminc.com
Sent: Wednesday, 31 August 2011 3:08 PM
On 30 August 2011 21:40, robin robi...@dodo.com.au wrote:
From: Tony Harminc t...@harminc.com
Sent: Wednesday, 31 August 2011 1:46 AM
On 30 August 2011 07:45, robin robi...@dodo.com.au wrote:
No it isn't, because,
my facts seems to reveal that Amdahl, Blaauw
and Brooks led the design team.
I don't know the actual hierarchy, but yes it was those three.
My feeling was that Blaauw made the higher level decisions
(should we have an EDIT instruction) and Amdahl the lower
level decisions (can we really implement
various fighting about software programmer vs. hardware programmer
How about just programmer, then? Hardware programmer vs. software
programmer, to me, makes a false distinction. I suppose a software
programmer might make sense if you're writing assembler code for a
non-existent hardware
On Thu, 1 Sep 2011 09:49:20 -0400 Phil Smith III wrote:
Nowadays, of course, you can just say programmer and
nobody bats an eye. And so the language evolves.
Losing (completely) the etymology of computer - being those *people*
(all women ?) that did the computing of tables. Interesting that
IBM Mainframe Assembler List ASSEMBLER-LIST@LISTSERV.UGA.EDU wrote on
09/01/2011 10:09:50 AM:
From: Shane ibm-m...@tpg.com.au
On Thu, 1 Sep 2011 09:49:20 -0400 Phil Smith III wrote:
Nowadays, of course, you can just say programmer and
nobody bats an eye. And so the language evolves.
can live with the shame.
Bill Fairchild
-Original Message-
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On
Behalf Of Tony Harminc
Sent: Wednesday, August 31, 2011 12:09 AM
To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
Subject: Re: EDIT instruction
On 30 August 2011 21
On Aug 30, 2011, at 23:29, Fred van der Windt wrote:
The comfort or discomfort of the ASSEMBLER programmers is not significant in
this context, in my believe. Due to pipelining and cache issues,
clever compilers will sooner or later outperform hand-written ASSEMBLER
programs.
The z196 is
From: glen herrmannsfeldt g...@ugcs.caltech.edu
Sent: Tuesday, 30 August 2011 8:39 PM
(after Glen wrote)
The book Computer Architecture: Concepts and Evolution by
Blaauw and Brooks has many descriptions on how instructions got
to be the way they did.
The book covers a wide variety of
On Tue, 30 Aug 2011 01:14:45 -0700, glen herrmannsfeldt wrote:
The book Computer Architecture: Concepts and Evolution by
Blaauw and Brooks has many descriptions on how instructions got
to be the way they did.
(Blaauw was the main designer of S/360...
I thought that Gene Amdahl was the principle
On 30 August 2011 07:45, robin robi...@dodo.com.au wrote:
No it isn't, because, for the reason given,
namely, that IBM software programmers didn't want to use the instruction.
Don't you mean hardware programmers?
Tony H.
This is IMHO the old RISC - CISC discussion.
Should we have machine instructions to compute a polynome of grade n?
I don't think so (but there were machines in the 60s which did just that,
and - in that period - they were faster by using such instructions).
Should we have machine instructions
From: Tony Harminc t...@harminc.com
Sent: Wednesday, 31 August 2011 1:46 AM
On 30 August 2011 07:45, robin robi...@dodo.com.au wrote:
No it isn't, because, for the reason given,
namely, that IBM software programmers didn't want to use the instruction.
Don't you mean hardware programmers?
From: Bernd Oppolzer bernd.oppol...@t-online.de
Sent: Wednesday, 31 August 2011 5:34 AM
This is IMHO the old RISC - CISC discussion.
Should we have machine instructions to compute a polynome of grade n?
I don't think so (but there were machines in the 60s which did just that,
and - in that
On 30 August 2011 21:40, robin robi...@dodo.com.au wrote:
From: Tony Harminc t...@harminc.com
Sent: Wednesday, 31 August 2011 1:46 AM
On 30 August 2011 07:45, robin robi...@dodo.com.au wrote:
No it isn't, because, for the reason given,
namely, that IBM software programmers didn't want to
The comfort or discomfort of the ASSEMBLER programmers is not significant in
this context, in my believe. Due to pipelining and cache issues,
clever compilers will sooner or later outperform hand-written ASSEMBLER
programs.
The z196 is able to 'reorder' instructions for execution. Doesn't
Do any of you old-timers (e.g. Fairchild, Cole) know how the EDIT (ED)
instruction came to be the way it is? It's one of the original IBM 360
instructions. Has to be the most complicated of them. Did they have
microcode back then?
The main thing that bugs me about this instruction is that if you
From: Justin R. Bendich jbend...@austin.rr.com
Sent: Tuesday, 30 August 2011 1:29 PM
Do any of you old-timers (e.g. Fairchild, Cole) know how the EDIT (ED)
instruction came to be the way it is? It's one of the original IBM 360
instructions. Has to be the most complicated of them.
The EDMK
On 8/29/2011 11:29 PM, Justin R. Bendich wrote:
Do any of you old-timers (e.g. Fairchild, Cole) know how the EDIT (ED)
instruction came to be the way it is? It's one of the original IBM 360
instructions. Has to be the most complicated of them. Did they have
microcode back then?
My
From: Gerhard Postpischil gerh...@valley.net
Sent: Tuesday, 30 August 2011 2:57 PM
On 8/29/2011 11:29 PM, Justin R. Bendich wrote:
Do any of you old-timers (e.g. Fairchild, Cole) know how the EDIT (ED)
instruction came to be the way it is? It's one of the original IBM 360
instructions. Has to
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