I wonder if any old-timer here can help identify this chip, or the logo, or the board it is on - it's probably a front panel from a minicomputer, or something like it.

The board photo and rear side photo in this post [German].

Cheers
Ed

The middle IC in that link with the full pic has a slightly different manufacturer? marking than the other 2.

_________________
65Org16:https://github.com/ElEctric-EyE/verilog-6502

Ed:

I've looked around, but haven't been able to identify the logo. I don't think it is an Intersil logo as apparently suggested by one of the German posters.

I assumed that the unit is European in origin. Is that right?

I checked the logos for several defunct European minicomputer makers such as Regnecentralen (Denmark), Norsk Data (Norway), and ICL (England), but none of those appear to use anything close to the markings on the ICs and the back of the board; there appears to be the logo from the ICs embedded in the copper on the back as well.

To me the logo appears to be a stylized/script S followed by two Is. So I was thinking it might be Seiko Instruments, Inc., but their logo appears to be SII.

Any other clues?

_________________
Michael A.

I thought something along these lines, 'cept I saw 2 II's and a sylized 'S'.
Maybe you've gotten too used to reading english like binary/? from right to left?

_________________
65Org16:https://github.com/ElEctric-EyE/verilog-6502

Also... Look at the hole through the ceramic of the left side...

I see there's an update?
Intersil?

_________________
65Org16:https://github.com/ElEctric-EyE/verilog-6502

Thanks Michael, EEye. As far as I can tell, Intersil's logo was based on a lowercase 'i' and then changed to INTERSIL.
Here's some more background:

So, Michael having spotted the same logo on the back side, this must be a system from an outfit which could make its own chips. I would suppose European, or Eastern Bloc. But the back also carries the annotation "CSL CONT" and the front has an annotation "SPARE" and another "SERIAL" - so that seems to be English (and in a Latin alphabet) - might not be an English-speaking country but makes it perhaps a bit less likely to be Soviet.

Maybe the sloping line is a stylised integral sign? So it's II∫
On the back side, the first I looks faint or small - I wonder if that's intended.

Ed

An answer has been found: It's a ca 1970..1974 Four-Phase Systems IV/70 operators console.

The three bars are the stylized 'IV' logo. I've seen it many times and feel total stupid for not recognizing it for the better part of two decades.

Ref: https://retrocomputing.stackexchange.com/a/28370/6659

Hurrah! Thanks for bringing the update to this thread. Unfortunately the original post on G+ is lost (together with G+) and I can't find an archive. From my emails I can find that it was probably posted by the Computeum account.

And there is some suggestion that Four Phase produced their microprocessor before either the 4004 or the F-14 Flight Director...