So, what's the problem? Is it not working?

I've got this one that is labeled 708-086. It is also known as a DTK-PII-129. It has an extra bank of chips and the layout is a little different, but there are a number of similarities.

https://theretroweb.com/expansioncards/s/dtk- … 9-640k-ram-card

Perhaps you have an early DTK ram card.

Hi, first of all thanks for the reply.
I still don't know if the card works or not, as soon as possible I will do a test and share the result.
My thought is turned to the row of empty sockets, I have a lot of ram and I could fill them all, the problem arises from the fact that I would not know how to set the jumpers.
I saw the close similarity with the PII-129, for sure the 3-position jumper of the card combined with the 6-position switch, will equal my 8-position switch, but the problem of the settings remains...
I will continue to search, maybe with a bit of luck something will pop up...

demyx wrote on 2024-12-12, 16:46:

Hi, first of all thanks for the reply. I still don't know if the card works or not, as soon as possible I will do a test and sha […]
Show full quote

Hi, first of all thanks for the reply.
I still don't know if the card works or not, as soon as possible I will do a test and share the result.
My thought is turned to the row of empty sockets, I have a lot of ram and I could fill them all, the problem arises from the fact that I would not know how to set the jumpers.
I saw the close similarity with the PII-129, for sure the 3-position jumper of the card combined with the 6-position switch, will equal my 8-position switch, but the problem of the settings remains...
I will continue to search, maybe with a bit of luck something will pop up...

The PCB looks < 1985 to me but it is possible that the "15 87" on the back of the card suggests that the card was made in the 15th week of 1987. Maybe?

Unfortunately the FCC ID's for DTK don't go back any earlier than 1988, so that date doesn't help us. I would have had a hard time identifying my card if that PII-129 sticker fell off.

The jumper settings for my card are here: https://theretroweb.com/expansioncard/documen … ee746365713.pdf

Maybe you can figure out what the jumpers do if you follow the traces. It's a pretty simple card.