All this discussion brings back long-ago memories. As a student, we had a 407
in the same room as a 1620 and a new 1410 was in the next room. I used a rather
minimal Fortran on the 1620, Autocoder on the 1410 (and basic machine
instructions on the 1410 when it was in 1401 mode). I had a student
: Tuesday, May 31, 2022 6:30 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
>From memory, the LEO (Lyons Electronic Office) computer of 1951/2 used
decimal (not octal or hexadecimal) digits. I cannot find a reference to
it, but this might help:
h
gt; Sent: Sunday, May 29, 2022 8:45 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: Tabulating Machines (was "... z114")
>
> On Sun, 29 May 2022 17:11:33 -0700, Charles Mills wrote:
>
>> I have never programmed a Tab machine but here is what I know.
>>
>&g
@LISTSERV.UA.EDU] on behalf of
Joel C. Ewing [jce.ebe...@cox.net]
Sent: Monday, May 30, 2022 5:16 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
Just from the online pictures, the IBM 403 control board was definitely smaller
(looks like maybe 66 vs. 80
z
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Joel C. Ewing [jce.ebe...@cox.net]
Sent: Monday, May 30, 2022 5:16 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
Just
Just stumbled upon this thread and can't resist a comment or two.
In 1971 I went from "correspondence" training to 3 months "intensive training"
at the College of Automation in Jacksonville FL... Yep, Now I know that was a
pure scam, but I did learn how to wire accounting machines, code in RPG
g [jce.ebe...@cox.net]
Sent: Monday, May 30, 2022 1:13 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
An IBM 407 control board was the largest of that on any of the plug
board machines I ever used, probably at least 24" x 24" (columns
numbered
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Paul Gilmartin [000433f07816-dmarc-requ...@listserv.ua.edu]
Sent: Sunday, May 29, 2022 8:45 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
On Sun, 29 May
On Mon, 30 May 2022 10:33:23 +, Seymour J Metz wrote:
>
>As a side note, Richard Feynman described using a room for of EAM equipment to
>do calculation for the Manhattan Project.
>
Imagine debugging.
Code Reviews.
Comments on sticky notes.
--
gil
] on behalf of
Paul Gilmartin [000433f07816-dmarc-requ...@listserv.ua.edu]
Sent: Sunday, May 29, 2022 8:45 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
On Sun, 29 May 2022 17:11:33 -0700, Charles Mills wrote:
>I have never programmed a Tab mac
On 2022-05-30 20:33, Seymour J Metz wrote:
I've only seen a 407; did the boards for the other 40x machines have
the same form factor?
You could open the door an wire the board without removing it; I can't
imagine wanting to do so.
When a minor change was required to the wiring,
the could be
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Joel C. Ewing [jce.ebe...@cox.net]
Sent: Monday, May 30, 2022 1:13 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
An IBM 407 control board was t
An IBM 407 control board was the largest of that on any of the plug
board machines I ever used, probably at least 24" x 24" (columns
numbered 1 -80 and rows numbered A - BL). A Google search for "407
plug board" will find several pictures (but not all for 407s). One
picture shows that the
BM-MAIN@LISTSERV.UA.EDU
Subject: Re: Tabulating Machines (was "... z114")
I've used a mechanical Marchant calculator, but the 407 used relays.
The boards for tabulators were a lot heavier than the boards for other EAMs,
e.g., interpreters.
--
Shmuel (Seymour J.)
On Sun, 29 May 2022 17:11:33 -0700, Charles Mills wrote:
>I have never programmed a Tab machine but here is what I know.
>
>The addition and so forth was purely mechanical. Anyone remember old-fashioned
>mechanical adding machines? Picture a wheel with ten cogs on it numbered 0
>through 9.
Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Charles Mills [charl...@mcn.org]
Sent: Sunday, May 29, 2022 8:11 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Tabulating Machines (was "... z114")
I have never programmed a Tab machine but here is what I know.
The addition and so forth
@LISTSERV.UA.EDU] On Behalf
Of Charles Mills
Sent: Sunday, May 29, 2022 5:12 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Tabulating Machines (was "... z114")
I have never programmed a Tab machine but here is what I know.
The addition and so forth was purely mechanical. Anyone remember old-fashioned
I have never programmed a Tab machine but here is what I know.
The addition and so forth was purely mechanical. Anyone remember old-fashioned
mechanical adding machines? Picture a wheel with ten cogs on it numbered 0
through 9. Let's say it is indicating 5. If you turn it three clicks it is now
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