Saturday, November 30, 2019

SEECHECK from REDIFON developed with Entrex

Equivalents: ENTREX 480 from ENTREX, DATENSAMMELSYSTEM 620 from NIXDORF.

https://pl.wikipedia.org/wiki/Rejestrator_danych

The connection comes from this page:

http://www.aldricharchive.com/technical-history-rocc.html


Seecheck (1972)
The technology for the Seecheck system was developed with the Entrex company in the US, Redifon having the rights to sell it in the UK, and also developed a market in Eastern Europe and the Middle East. It was based around the Nova 16-bit mini computer produced by Data General, and set the basic architecture of all the systems developed down to the 2885 in 1990.

Seecheck Basic Control Groups (BCG) used a ‘Lowboy’ rack containing a 17 slot ‘DCC’ mini, tape drive, disk drives and necessary power supplies. The DCC mini computer had a 1200ns processor and 64KB of core store, and was also the only Nova based system supplied with programmers switches built in to the front panel, all subsequent systems having a detachable one for engineers’ use only.

------------------------------------------------------------------

I think the interesting part is this:

In 1974 Redifon signed a licensing agreement with Metronex/Meramat in Poland whereby Seecheck would be manufactured in Poland using Soviet-bloc hardware for sale in Soviet-bloc countries. Although peripherals were available in the Soviet-bloc there was not a suitable CPU so Redifon designed and developed a DG Nova compatible mini, called the P.1, for manufacture in Poland. This CPU complied with the then CoCom strategic embargo. Later Redifon would up-grade this design for the E.17 mini made in the UK.

So that would be a clone of a clone of a clone perhaps

And then somehow we get to this image, which shows the newer Entrex keystation terminal?

Sunday, November 3, 2019

Recognition Equipment's Input 80 OCR

Computerworld - May 9, 1973 - page 9-10
A company (not very creatively called) Recognition Equipment...NOT Entrex, but they are certainly using Entrex Data/Scopes there.
But it looks like Recognition Equipment put a sticker over the "Entrex Data/Scope" on the plexiglass screen cover...

club-nixdorf.org archives & The last 620

Does anyone know the original author of this site?  Is he/she still out there?
(backup at archive.org/web)

José A. Margolles Rodríguez  or José Mesa

There are some fantastic promotional images of the Nixdorf 620 (Entrex 480) system and Data/Scope Keystations (terminals) on here...


Where did he get these?
 

And then there's 
The Last 620

http://www.club-nixdorf.org/cn/web/anecdotas/ultimo620.htm
(backup at archive.org/web)

Friday, November 1, 2019

Scanner Board/Terminal Multiplexer Board

Clearly this is a very important component of the system, unique to Entrex!  According to Barry King, who was a Area Field Engineering Manager for Entrex from 1977-1991 in Nashville, TN:
"The key to the Entrex system was the Scanner board and software developed by 2 or 3 guys at MIT as a project to complete their Master's.".  Read more here.

ComponentQty
899-5-R220/3301
SN740020
SN740418
SN74083
SN74109
SN741071
SN741212
SN741221
SN741771
SN741795
SN743816
SN74407
SN74421
SN747413
SN74763
SN74934
SN754517