3 Apr
2005
3 Apr
'05
8:42 p.m.
I have found a
manaul called "HP's 3 1/2-Inch Flexible Disc Drive Service
Documentation". It's pretty content-free, the main useful part is the
appendix giving the Amigo command set, at least for floppies.
I also have that manual. I sent it to (someone) a couple of years ago to
be scanned/copied and they disseminated a lot of copies. Your copy may well
have come from me originally. FWIW it's part of a larger manual. Each I also have a section on the 9123. The 9123
operates the same as a 9122
but gets it's power from the HP 150-II. It may be the same as drive and
Yes, I have one. Somewhere I have the pinout of the PSU cable (it's just
+12V and +5V, of course).
logic board as a 9122 but I don't know. However I
have a couple of 9122s
and 9123s and I could open them up and compare them if necessary.
I don't have a 9122 to look at, but the 9123 that I have is very
different to other HP drive units that I've looked inside. For one thing
it uses an HP custom HPIB buffer chip -- the same one that's used in the
82169 (HPIL-HPIB translator, I have the service manual for that and it
_does_ contain schematics). All the other HP drives I've been inside have
used stnadard (Intel, Motorola, etc) buffers.
I also have a section on the 9114 but I think you have that as well.
I don't, but I have my own schematics for the 9114 (both versions, both
types of battery pack, etc). I also have my notes on how to set the darn
thing up (which is remarkably easy). I've seen a 9114 service manual, and
it was a waste of good tress!
I also have a separate manual, 'HP-82901 M/S & HP-82902 M/S Flexible
Disk Drive Service Manual", that covers the old style 5 1/4" floppy drives.
Does this manual contain any useful info? IIRC those drives used a 6802
processor, not the 6809 used in all later units.
BTW I just found a note that I missed earlier. It
says that the 9133D
uses the ST-225. I think the 9133H uses a ST-4(something) drive.
I am _sure_ my 9133H uses as ST225. Or at least the ST225 scheamtics I
have apply to the drive in that unit...
-tony