[time-nuts] Re: TRAK Systems 8812 (marco bartoli)

[marco bartoli]

GPIB implemented.
The original manual doesn't talk more about GPIB..
________________________________
From: Peter Bell via time-nuts <time-nuts at lists.febo.com>
Sent: 19 September 2022 5:59 AM
To: Discussion of precise time and frequency measurement <time-nuts at lists.febo.com>
Cc: Peter Bell <bell.peter at gmail.com>
Subject: [time-nuts] Re: TRAK Systems 8812 (marco bartoli)

On Mon, Sep 19, 2022 at 10:31 AM John via time-nuts <
time-nuts at lists.febo.com> wrote:

> My guess is that the 40 pin chip will be the special-programming
> Motorola 68k-series GPIB interface processor. Not normally available,
> although probably recoverable from scrapped gear. Will the programming
> be identical? I don't know.
>

Looking at the wiring to the chips below it (which are most likely
SN75160/SN75161) I would
guess its a NEC uPD7210 -  at least the data lines seem to be in about the
right place for
that part (assuming the driver chip on the left is the 75160) - they look
pretty clearly wrong for
the TMS9914A, which would be the other obvious choice for the time period
in question.
_______________________________________________
time-nuts mailing list -- time-nuts at lists.febo.com
To unsubscribe send an email to time-nuts-leave at lists.febo.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20220920_231843.jpg
Type: image/jpeg
Size: 304399 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220921/5a753577/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20220920_231905.jpg
Type: image/jpeg
Size: 276363 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220921/5a753577/attachment-0001.jpg>