Some of the traces are easily observed going to the headers on the top, bottom, and right side of the card.

Some of them are direct linkages to the chips on the card, so datasheets from those chips could tell us what those signals are supposed to be.
The BACK of the card has surface mount pads for 4 more chips, presumably of the same species. These also seem to have terminations at the IDC header strips at the top, right, and bottom.

Sadly, the routing is all kinds of spaghetti swirl in nature, and eye-crossing.

If you can get a better contrast image of one of the RAM chips so I can look it up, that would help. The existing images there are too low fidelity to read the chip markings.

Since there are 4 unsoldered pads, wouldn't be easier to find compatible memory chips and solder them on the back of the card, instead of looking for exotic expansion modules?
I have two permedia 2 cards, one pci and one agp, the pci card is 4mb while the agp is 8mb, I don't know if there are 8mb pci versions but the chip can address the 8mb without issues.

Ok, good idea. I’ll have to see if I can source some chips.

douglar wrote on 2025-10-11, 11:05:

Ok, good idea. I’ll have to see if I can source some chips.

It shouldn't be too difficult to find a donor card, buy a cheap card from ebay or r buy them from shady shops like utsource.

Looks like the cheapest donor is an 8MB Permedia card. Seems like there could be a shortcut here .....

douglar wrote on 2025-10-13, 15:07:

Looks like the cheapest donor is an 8MB Permedia card. Seems like there could be a shortcut here .....

But those are rare. Why not simply buy an 8 MB Permedia 2?

SGRAM chips should all be standardized, so any card with 1MB SGRAM chips should work provided the speed rating is good enough.

Putas wrote on 2025-10-13, 17:07:

douglar wrote on 2025-10-13, 15:07:

Looks like the cheapest donor is an 8MB Permedia card. Seems like there could be a shortcut here .....

But those are rare. Why not simply buy an 8 MB Permedia 2?

Sorry, I didn't give enough detail. Yes, I found a $10 8 MB Permedia 2

douglar wrote on 2025-10-13, 19:25:

Putas wrote on 2025-10-13, 17:07:

douglar wrote on 2025-10-13, 15:07:

Looks like the cheapest donor is an 8MB Permedia card. Seems like there could be a shortcut here .....

But those are rare. Why not simply buy an 8 MB Permedia 2?

Sorry, I didn't give enough detail. Yes, I found a $10 8 MB Permedia 2

Wow very nice price. I suppose it's agp right? Or were you able to find a 8mb pci?

Nemo1985 wrote on 2025-10-13, 20:28:

Wow very nice price. I suppose it's agp right? Or were you able to find a 8mb pci?

I'm lucky enough to have a PCI one that's been in my tool kit since 1999.

https://theretroweb.com/expansioncards/s/eon-lung-hwa-dp335

I think I played Warzone 2100 on it.

Edit -- Now that I think about it, I put mine in a build in the early 2000's for a family member, but I trash picked this one around 2010 because it looked like the one that I used to have.

wow permedia 2v... congrats!