I can't really zoom in so it is hard for me to see clearly. If this is a SCSI card, it looks like these might be the sockets for the termination resistors.
The chip should probably have a foil sticker or something blocking the window from passing UV. Electrical tape would fix that. It generally takes really strong UV exposure for several seconds to wipe a BIOS, so I wouldn't be too worried about it being wiped if it has been sitting in a dark box somewhere.

It is a SCSI/floppy card.

It's been in a box for almost a year since I took it out of the 486 it was in, which in turn had been sitting in a closet for almost 20 years.

Here's a link to the full size photo I took. It's rather large, almost 3MB so heads up if you have a slow connection or something.

http://www.robertalpizar.com/vogons/in2000a.jpg

Yeah, I'm pretty sure that is where the terminators go. My SCSI card has little banks that also have RN1, RN2 & RN3 (assuming it stands for resistor network?)
I don't think not having those will be a problem if you have external devices and are running terminators on the end of the chain, but without the terminating resistors I don't know if you can run internal devices (or maybe I've got it the other way round). Any SCSI gurus out there?

snorg wrote:

Yeah, I'm pretty sure that is where the terminators go. My SCSI card has little banks that also have RN1, RN2 & RN3 (assuming it stands for resistor network?)
I don't think not having those will be a problem if you have external devices and are running terminators on the end of the chain, but without the terminating resistors I don't know if you can run internal devices (or maybe I've got it the other way round). Any SCSI gurus out there?

Aren't SCSI terminators supposed to be attached to the last SCSI device at the end of the chain and not to the interface? Every piece of external SCSI gear I have ever owned has been this way.

sliderider wrote:

Aren't SCSI terminators supposed to be attached to the last SCSI device at the end of the chain and not to the interface? Every piece of external SCSI gear I have ever owned has been this way.

SCSI buses need to be terminated at both ends, just like a 10Base2 co-ax network.

Better SCSI cards can detect if there are internal AND external devices connected, and enable or disable their internal termination as appropriate. Enabled if only internal, or only external devices are present, disabled if both exist.

http://museum.ttrk.ee/th99/c/A-B/20029.htm
and
https://groups.google.com/forum/#!topic/maus. … are/5B3F_JZOPA4