I have an HP 5SI laser printer. When I got it, it just had the base 4 megs. So, I stuck a couple of 8 meg sticks I had laying around, and everything was fine. Then I upgraded with the Postscript simm, and it was still fine.

Then I added a duplexer, and it works great, but the configuration shows no buffering or I/O resource sharing. I guess it figures I've got too much stuff for the memory I've got, so I tried to add some more.

Every other stick I put in it, (4M,16M, or 32M) has either been not recognized or else comes up with an error.

I struck me that maybe all my old stuff (except for the initial 8M sticks) is EDO memory and I just happened to use some old FPM stuff.

I know, this is a rather esoteric question, but given the range of experience and the depth of knowledge here on FT, maybe someone out there actually knows!