The first EDO were on SIMMS = Single Inline Memory Module = FPM (Fast Page
Mode) and EDO (Extended Data Out) that improved the speed of FPM. Most
earlier EDO SIMM boards you could run either FPM or EDO SIMMS, but you were
advised not to mix them. EDO SIMMS have to be run in pairs.
Next came EDO DIMMS and then SDRAM DIMMS
Sounds like you have EDO SIMMS. You can buy these on Ebay up to 128 X 2 =
256 but rare. Most were up to 64 X 2 = 128.
This makes me think back to the first time I ever ordered RAM for my PC, a
AST 486DX33 in 1993. 4 megs of Samsung FPM for about 160 dollars.
At 03:11 PM 10/26/2006, you wrote:
OK so I have a really old machine. I'd like to think that it might be
"PC66" but now I'm not
so sure. It is EDO ram. NOT SDRAM.
Got some new DIMMS today, but they do not fit. They were/are SDRAM. At
least they are
based on where the notches in the DIMM(s) are. Have RMA needs and is in
process (tomorrow).
They were EDO by chip specs, though.
Does anyone have pointers/links to when/what the JIDEC specs are for
DIMMS? Looking for
the spacing of the locating notches and/or socket specs for the 168-pin pwbas.
I've forgotten way too much. I apologize. Just want to get a very OLD
dinosaur to run
W2K/SP4 @512MB, which mpc.com tells me is possible.
I need to retire from this hobby...... One day maybe!
Thanks,
Duncan
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