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Can someone identify NEC's proprietary ISA slot?

raifield

Experienced Member
Joined
Aug 3, 2010
Messages
174
Location
NJ, USA
I've got a NEC Powermate SX board inside a NEC Powermate 1 case (works great!) and the Powermate SX has a curious "extended" ISA slot that I can't seem to find much information about. I gather it's for a proprietary memory card, but I can't seem to find any information as to what I might start looking for.

If anyone has any clue, I would certainly appreciate a heads-up.

20150419_141701.jpg
 

Chuck(G)

25k Member
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Jan 11, 2007
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Pacific Northwest, USA
I believe that's the slot for the memory expansion card. Very common in 386 systems and almost certainly unique to this particular machine. Good luck in finding one.
 

krebizfan

Veteran Member
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May 23, 2009
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5,462
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Connecticut
If you can find a manual, you may be able to gather part numbers that will allow you to find matching systems that used the same card. I know NEC shared these cards with a number of other companies. Finding a complete system which has the card will be difficult since few got a memory card. Ebay gets 32-bit memory cards occasionally but so poorly photographed and described that it is impossible to determine the correct system.

You might try looking at http://ps-2.kev009.com/ohlandl/PS2_MOST/ACROREAD/TSSFACT/TFSPC/NEC/2012008.PDF and see if that can give you part numbers that can lead you to a next step. If your model differs, there are a lot of other PDF files at that site.
 

raifield

Experienced Member
Joined
Aug 3, 2010
Messages
174
Location
NJ, USA
Thanks krebizfan, I found the PDF that corresponds to my system.

Apparently I need either:

2MB memory exp. board OEM 136-008302-855A IBM 67H9122
4MB memory exp. board OEM 136-008302-853A IBM 67H9120

Nothing to do now but simply keep looking for them. Thanks!
 
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