Norm,

     Unfortunately, I didn't call in to check my mail before
coming in this morning.  I shoulda stayed home!
     
     I tried the good interface board in im4 and got exactly
the same result as the second board (bad Bus Grant signal).
I also tried the second board in im3--the monitor halts
during bootup with the messages:

Watchdog reset
Window underflow

     I have not yet been able to find the source of this
problem.  Also, when I plugged the good interface back
into im3, I was unable to run rotate.exp, although the 
interface seemed to be talking to cam OK.  Sorry to
leave this in a worse state than I found it.

Doug