Re: architecture, The Design of Design

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Sujet : Re: architecture, The Design of Design
De : tkoenig (at) *nospam* netcologne.de (Thomas Koenig)
Groupes : comp.arch
Date : 05. May 2024, 11:50:34
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v17o9q$1qgti$1@dont-email.me>
References : 1 2 3 4 5 6 7
User-Agent : slrn/1.0.3 (Linux)
EricP <ThatWouldBeTelling@thevillage.com> schrieb:

https://computermuseum.uwaterloo.ca/index.php/Detail/objects/13
>
and says the 704 tube logic circuits were designed by someone named
A. Halsey Dickinson, AND it seems he also designed the 604 tube circuits,
which were circa 1948, and those are documented.
This document is dated 1958 so contemporaneous with the 704
and details the 604 tube logic circuits:
>
http://www.bitsavers.org/pdf/ibm/604/227-7609-0_604_CE_man_1958.pdf
>
It is possible the 704's "T" gate stands for what 604 called TR or
Trigger units, which appears to be what we today call an SR Latch.

Quite interesting.

They had inverter, two-input NAND, two-input NOR, Pentagrid as a
two-input OR, and a cheap Diode Switch (DS) as two-input AND) as
logic gates.  The 704 seems to have used mostly AND and OR gates,
so the decision to AND the index register with the bit from the
instruction and then OR them together actually seems straightforward,
this also gives you zero if none of them is selected.

Having the possibility of more than one index register seems to
have been a consequence of design which allowed for zero or the
content of one register as the main purpose.  Even if no documents
survive to prove this, I'm fairly confident that this is why
they did it.

Programmers being programmers, they probably started using the
feature for some multi-dimensional arrays with sizes of powers
of two, and IBM was then stuck with the feature.

Date Sujet#  Auteur
21 Apr 24 * The Design of Design128Thomas Koenig
21 Apr 24 +* Re: The Design of Design67John Levine
25 Apr 24 i`* Re: The Design of Design66Thomas Koenig
25 Apr 24 i `* Re: The Design of Design65Stephen Fuld
26 Apr 24 i  +* Re: The Design of Design56John Levine
26 Apr 24 i  i+* Re: The Design of Design2MitchAlsup1
26 Apr 24 i  ii`- Re: The Design of Design1John Levine
26 Apr 24 i  i+* Re: The Design of Design50Thomas Koenig
26 Apr 24 i  ii+- Re: The Design of Design1Stephen Fuld
26 Apr 24 i  ii+* Re: The Design of Design47John Levine
27 Apr 24 i  iii+* Re: The Design of Design4Thomas Koenig
27 Apr 24 i  iiii`* Re: PDP-10 addressing, was The Design of Design3John Levine
27 Apr 24 i  iiii `* Re: PDP-10 addressing, was The Design of Design2MitchAlsup1
27 Apr 24 i  iiii  `- Re: PDP-10 addressing, was The Design of Design1John Levine
30 Apr 24 i  iii`* Re: The Design of Design42MitchAlsup1
30 Apr 24 i  iii +* Re: The Design of Design40John Levine
1 May 24 i  iii i`* Re: The Design of Design39Tim Rentsch
1 May 24 i  iii i `* Re: architecture, The Design of Design38John Levine
2 May 24 i  iii i  +- Re: index architecture, The Design of Design1John Levine
2 May 24 i  iii i  +* Re: architecture, The Design of Design4Thomas Koenig
3 May 24 i  iii i  i+- Re: architecture, The Design of Design1MitchAlsup1
5 May 24 i  iii i  i`* Re: architecture, The Design of Design2Thomas Koenig
5 May 24 i  iii i  i `- Re: ancient 704 architecture, The Design of Design1John Levine
7 May 24 i  iii i  `* Re: architecture, The Design of Design32Tim Rentsch
7 May 24 i  iii i   +- Re: architecture, The Design of Design1Thomas Koenig
7 May 24 i  iii i   +* Re: architecture, The Design of Design28Michael S
7 May 24 i  iii i   i+* Re: architecture, The Design of Design2John Levine
8 May 24 i  iii i   ii`- Re: architecture, The Design of Design1John Levine
8 May 24 i  iii i   i+* Re: architecture, The Design of Design2Tim Rentsch
9 May 24 i  iii i   ii`- Re: architecture, The Design of Design1John Levine
8 May 24 i  iii i   i`* Re: architecture, The Design of Design23Thomas Koenig
8 May 24 i  iii i   i `* Re: architecture, The Design of Design22Michael S
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9 May 24 i  iii i   i   +* Re: backward architecture, The Design of Design2Lynn Wheeler
10 May 24 i  iii i   i   i`- Re: backward architecture, The Design of Design1Lynn Wheeler
9 May 24 i  iii i   i   `* Re: backward architecture, The Design of Design18Michael S
9 May 24 i  iii i   i    +* Re: backward architecture, The Design of Design14Thomas Koenig
9 May 24 i  iii i   i    i`* Re: backward architecture, The Design of Design13Michael S
9 May 24 i  iii i   i    i +* Re: backward architecture, The Design of Design2Anton Ertl
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9 May 24 i  iii i   i    i +* Re: backward architecture, The Design of Design9Stephen Fuld
9 May 24 i  iii i   i    i i+* Re: backward architecture, The Design of Design2Michael S
9 May 24 i  iii i   i    i ii`- Re: backward architecture, The Design of Design1John Dallman
10 May 24 i  iii i   i    i i`* Re: backward architecture, The Design of Design6Tim Rentsch
10 May 24 i  iii i   i    i i `* Re: backward architecture, The Design of Design5Stephen Fuld
30 May 24 i  iii i   i    i i  `* Re: backward architecture, The Design of Design4Tim Rentsch
30 May 24 i  iii i   i    i i   `* Re: backward architecture, The Design of Design3Stephen Fuld
30 May 24 i  iii i   i    i i    `* Re: backward architecture, The Design of Design2Tim Rentsch
31 May 24 i  iii i   i    i i     `- Re: backward architecture, The Design of Design1John Levine
10 May 24 i  iii i   i    i `- Re: backward architecture, The Design of Design1Tim Rentsch
10 May 24 i  iii i   i    +- Re: backward architecture, The Design of Design1John Levine
10 May 24 i  iii i   i    `* Re: backward architecture, The Design of Design2Tim Rentsch
10 May 24 i  iii i   i     `- Re: backward architecture, The Design of Design1John Levine
7 May 24 i  iii i   `* Re: architecture, The Design of Design2Anton Ertl
8 May 24 i  iii i    `- Re: architecture, The Design of Design1Tim Rentsch
30 Apr 24 i  iii `- Re: The Design of Design1MitchAlsup1
30 Apr 24 i  ii`- Re: what's a register, The Design of Design1John Levine
26 Apr 24 i  i`* Re: The Design of Design3Stephen Fuld
26 Apr 24 i  i `* Re: The Design of Design2John Levine
26 Apr 24 i  i  `- Re: The Design of Design1Stephen Fuld
27 Apr 24 i  +* Re: The Design of Design7Thomas Koenig
27 Apr 24 i  i+- Re: The Design of Design1Stephen Fuld
27 Apr 24 i  i+* Re: The Design of Design2John Levine
27 Apr 24 i  ii`- Re: The Design of Design1Thomas Koenig
28 Apr 24 i  i`* Re: The Design of Design3Tim Rentsch
29 Apr 24 i  i `* Re: antitrust history, The Design of Design2John Levine
1 May 24 i  i  `- Re: antitrust history, The Design of Design1Tim Rentsch
29 Apr 24 i  `- Re: The Design of Design1Tim Rentsch
29 Apr 24 `* Re: The Design of Design60Tim Rentsch
1 May 24  `* Re: The Design of Design59Stephen Fuld
1 May 24   +* Re: JCL, The Design of Design3John Levine
1 May 24   i`* Re: JCL, The Design of Design2Stephen Fuld
1 May 24   i `- Re: JCL, The Design of Design1Stephen Fuld
1 May 24   +- Re: The Design of Design1MitchAlsup1
1 May 24   +- Re: The Design of Design1Thomas Koenig
7 May 24   `* Re: The Design of Design53Tim Rentsch
7 May 24    +* Re: The Design of Design45Stephen Fuld
7 May 24    i+- Re: The Design of Design1Thomas Koenig
7 May 24    i+* Re: The Design of Design33Stephen Fuld
7 May 24    ii+* Re: The Design of Design29Thomas Koenig
7 May 24    iii`* Re: The Design of Design28Stephen Fuld
7 May 24    iii +* Re: interative use, The Design of Design25John Levine
7 May 24    iii i+* Re: interative use, The Design of Design4MitchAlsup1
8 May 24    iii ii`* Re: third system syndrome, interactive use, The Design of Design3John Levine
8 May 24    iii ii `* Re: third system syndrome, interactive use, The Design of Design2Lynn Wheeler
9 May 24    iii ii  `- Re: third system syndrome, interactive use, The Design of Design1Lynn Wheeler
8 May 24    iii i`* Re: interative use, The Design of Design20Stephen Fuld
8 May 24    iii i `* Re: interative use, The Design of Design19John Levine
9 May 24    iii i  `* Re: interative use, The Design of Design18Stephen Fuld
10 May 24    iii i   `* Re: address architecture, not interactive use, The Design of Design17John Levine
10 May 24    iii i    +- Re: address architecture, not interactive use, The Design of Design1Stephen Fuld
11 May 24    iii i    `* Re: address architecture, not interactive use, The Design of Design15Thomas Koenig
11 May 24    iii i     +* Re: address architecture, not interactive use, The Design of Design3MitchAlsup1
12 May 24    iii i     i`* Re: address architecture, not interactive use, The Design of Design2Thomas Koenig
13 May 24    iii i     i `- Re: address architecture, not interactive use, The Design of Design1MitchAlsup1
11 May 24    iii i     `* Re: branch address architecture, not interactive use, The Design of Design11John Levine
12 May 24    iii i      `* Re: branch address architecture, not interactive use, The Design of Design10Thomas Koenig
13 May 24    iii i       `* Re: branch address architecture, not interactive use, The Design of Design9John Levine
13 May 24    iii i        `* Re: branch address architecture, not interactive use, The Design of Design8Thomas Koenig
13 May 24    iii i         `* Re: branch address architecture, not interactive use, The Design of Design7John Levine
13 May 24    iii i          +* Re: branch address architecture, not interactive use, The Design of Design4MitchAlsup1
14 May 24    iii i          +- Re: branch address architecture, not interactive use, The Design of Design1Thomas Koenig
25 May 24    iii i          `- Re: branch address architecture, not interactive use, The Design of Design1Anton Ertl
8 May 24    iii `* Re: The Design of Design2Thomas Koenig
10 May 24    ii`* Re: The Design of Design3Tim Rentsch
30 May 24    i`* Re: The Design of Design10Tim Rentsch
7 May 24    `* Re: The Design of Design7Thomas Koenig

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