I've got a bit of a write up on the IBM 3420/3803 tape drive subsystem
rescue I did this past week up finally. There's more info I hope to
post, but this is what I've got processed so far...
http://computer-refuge.org/compcollect/ibm/3420/
Pat
--
Purdue University ITAP/RCAC ---
http://www.rcac.purdue.edu/
The Computer Refuge ---
http://computer-refuge.org