Determine HPIB address programatically

[Paul Berger (Canada)]

There are only 3 switches to set the select code for the the interface and it is not a standard binary progression. It would seem that the switch settings for the integrated HPIB are the same as for the 82937A card, and I know that the manual for that card is correct. One thing that occurs to me is that to get a binary 1 the switch is in the open position. Select code 7 is SC2-0 100 or open, closed, closed sect code 8 is SC2-0 101 or open, closed, open. It may be that the switch contact for SC0 has gone bad and is now being interpreted as a '1', I would suggest rocking that switch back and forth a few times leaving it solidly in the closed position and see if that clears the issue. Beyond that you would need some kind of continuity tester to check the state of the switches and / or connection from them. There is a service guide for the 87 that includes schematics available at http://www.hpmuseum.net