9 Dec
2009
9 Dec
'09
11:04 a.m.
On Tuesday, December 8, 2009 at 19:47, Tony Duell wrote:
Very interesting. I've never seen another HP drive unit (hard, floppy
or tape) that uses the 9914.
Are you sure?
Yes. There were several different controller cards used in
these, including
different ones for the same model, depending on the date code.
Tjhat does not suprise me...
Can you please check the 9134A uses a 9914.
See "HP's 5 1/4-Inch Winchester Disc Drive Service Documentation" (part
number 09134-90032, August 1983). Section II, page 1-4 says, in part:
"The HP-IB bus controller (9914 HP-IB chip) manages the data transfers
across the HP-IB channel."
This is from the section entitled, "Winchester Controller PCA Theory of
Operation (88134-69910, 09135-69515, and 09135-69501)." The last part
number is the one in my 9134A.
There's a photograph of the card on page 1-8, and you can see the 9914 chip
on the board.
The 9133V and XV used controller part number 09133-69508, according to
Section III, page 1-2 of the aforementioned manual. Section III, page 1-5
says that controller uses an 8291A.
Certainlyk my 9133V and 9133VX use an 8291 chip, on both the hard disk
and floppy controllers (these units appear as 2 HPIB devices, and have
totally separate hard and floppy contoller boards which link to the same
HPIB connector).
From what I rememebr, the following also use 8291 GPIB
chips : 9121
(Amigo), 9122 (SS/80), 8123 (SS/80), 9133H (SS/80 -- unlike the earier
9133s, this has one contoller board for both the floppy and hard disks,
it appears as one HPIB device), 82901 (Amigo). The HP7959 (CS/80) uses a
Medusa chip IIRC, as does the 9153/9154.
-tony