FYI, there are a couple of pictures of HP 98622 GPIO cards at
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2521082261&category=25400>.
The item there isn't a DataComm unit. It's a system expander chassis for an HP
9000 200 or 300 series computer! It has four GPIO cards, three Datacomm cards and one
HP-IB card in it. The empty slot at the bottom is supposed to house the interface card
that connects it back to a 9000 200 or 300 series computer.
Note that the interface cards cover TWO expansion slots even though they only use one
slot. It's very possible that there are other cards installed in this chassis but
they're covered up and can't be seen.
Joe