Hi all,
I have some nice ram upgrade cards for the 808x and 286 computers and some of them are unclear to set up.
One is an Everex EV159 --> documented well
Three are unnamed 512k ram cards --> no ram chips so obviously not working now
One is a Persyst PC/SM card with some ram on it.
The last one is the one I'll try to get running.

As you can see this card has 4 ram banks of which 3 are populated with 4164 ram chips in the picture, total 192 kB. Also there are 2 parity chips installed. There is one jumper (yellow) and a 4 digit dip block. Bank 0 is on the left, bank 3 is on the right according to silk screen, just hidden in the photo.

Now I've got an IBM 8530 8086 and removed the ram, so the remaining 128kB onboard remains. The system boots fine to dos 3.30.
I've had the Persyst card with 2 ram banks and 2 parity chips installed and put it into the IBM and tried every single dip/jumper combo that is possible, but the IBM keeps reporting 128kB. Also had some switching around with the spare ram chips, no luck.
What could be wrong?

Also, if anybody knows jumper settings for the 512k ram card, it would be very nice as well, might just put the ram on one of these