10 Dec
2009
10 Dec
'09
9:15 p.m.
The Xebec OEM controller for the 9134A uses a 9914. It
speaks Amigo.
IIRC, the later HP board used for the 9133A also uses a 9914. The 9121
Interesting...
I wonder why HP went away from the 9914 in the drive units (all later
drives seem to use either the 8291 or the Medusa) while keeping it in
the host computers.
also uses a 9914.
Every 9121 I;ve seen has an 8291 in it. I have the 'service manual' for
the 3.5" floppy drive units, and while the only schematics it contains
are for PSUs it does contain full parts lists for the controller board in
the 9121. It states it uses a 8291.
The floppy controller board set in the 9133V/XV is electrically much the
same as the 9121, BTW (and uses an 8291). I can't comment on the 9133A
_floppy_ controller board, I've never seen one, but I think it uses the
same firmware ROM as the 9121, so presumably it's another 8291. Of course
there may be other versions of these controllers that I've not seen and
that aren't mentioned in the manuals.
-tony