> I think you are looking at an HP-IB interface, not a true
> centronics. I
> could be wrong.  I do not think you can get an HP-IB i/f for a PC.

Au contraire--there is a ton of support, both hardware and software:
  http://www.labmaster.com
  http://www.inesinc.com/atinter.htm
  http://www.transera.com/htbasic/hm900.html
  http://www.ziatech.com/datasheet/1444.htm
  http://www.cec488.com/ieee488.htm

and many more, including at least one from HP (well, Agilent now):
  http://www.tm.agilent.com/tmo/datasheets/English/HP82335B.html


Steve Dirickson   WestWin Consulting
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