Could this have something to do with the missing R70 and/or RP1?

That would be a pity... But could be soldered on if I knew what is needed here 😀

Any ideas? Would this be the issue, or would these be used for something else?

- R70
- R114
- RP1

I also noticed there are a lot of other components not places, so maybe this wouldn't be?

The RP1 seems to be a pull-up resistor array on memory address bus outputs.

I couldn't find a SE with RP1 installed.

Two of my Stealth SE PCI cards also doesn't have this RP1 installed and they work fine with 2MB.

My Stealth 64 VLB has them but PCI versions don't.

I guess it is optional.

I'd try a different RAM chips. Sometimes there are compatibility issues.

The ram chips I tried were not reported, neither the chips from the 5428 when I swapped them. I guess I could see if I've got some more chips the test... To be continued.

Ten PCI graphics cards... Six VLB... Fifteen isa. None with usable and removable chips (without desoldering).

Possible solution is on its hand: this week or next one I'll receive another bunch of S3 virge cards, just to harvest the ram chips from the sockets

😁

S3 Virge cards almost exclusively used EDO chips which might not work together with FPM you already have on your Trio 32 VLB.

In three mailbox appeared three virge cards: one 325 and two 375 DX ones.

The 375 did indeed prove not to have the correct ram: image shattered.

The 325 did in fact have the correct ram and now my Stealth SE has the full 2MB 😁

To be more precisely: the SE has two soldered chips: NEC 424260-70
The chips I got from the dead Cirrus were also 424260-70 but different brand.

The virge 375s have 424263-60 chips and didn't work for me.
The virge 325 has 424258 chips that do work.

Problem solved! 😁

I feel pleased that S3 card got that upgrade 😉

aaronkatrini wrote on 2021-03-08, 16:28:

I feel pleased that S3 card got that upgrade 😉

Just as it should have had off factory 😁
(And maybe did, long ago)