David Bryan just scanned and sent me a copy of "HP's 5 1/4-Inch
Winchester Disc Drive Service Documentation" (HP
09134-90032, August 1983) for the old style HP 9133/9134 and 9135 disk
drives. Besides the always useful service information, it includes
explainations of which drives can be made to look like 4 1.15Mb floppy
drives for use on the HP-85 and other small systems that don't normally use
the HP hard drives. I've posted it at
"http://www.classiccmp.org/hp/HP%20Docs/".
Thanks David!
Joe