Hello Olaf,

at the moment I add a GPIB Interface to a digital rf-powermeter, which I have built last year. I also use the iGPIB 72010 IC in PLCC case.
About the Drivers: You can't get the SN75162 any longer from national, but texas instruments still sell and manufracture those chips (I asked them last friday..)
I remember someone was looking for those chips some weeks ago at 8052.com, maybe it was you ?
I've got 2 pieces of 75160 and 75161 here.

best regards
alex
www.amgx.de