21 Aug
2011
21 Aug
'11
11:56 p.m.
Hi all --
Anyone have a service manual for the HP 9485A (not the B or C)? I
picked up three of these machines in fairly good physical condition just
a couple of days ago, but their operating condition leaves something to
be desired :).
I've looked in the usual places (hpmuseum.net, and hp9845.net) but I can
only find the manual for the B/C revisions. My understanding is that
the "A" version is different in some ways (not really sure what the
hardware differences are yet.)
The good news is that one of the three 9845s just required some careful
reseating of the cards and ROMs and it now appears to be working
correctly (I haven't yet tested the printer (no paper yet) and I'm
assuming the tape drives will require a bunch of work, assuming I ever
find any tapes to use). I'd love to get the other two running as well,
hence the need for the service manual. All three appear to be complete
(with I/O, Mass Storage, and Graphics option ROMs), now if I could just
get my hands on an HPIB interface...
Thanks,
Josh
22 Aug
22 Aug
2:16 a.m.
Josh,
The HP-IB interface shouldn't be a big problem, but you'll need a HP 98034B
or a revised A version.
The standard HP 98034A version doesn't support high-speed CS80 drives.
If you want to part from one of the machines I would love to give one a new
home.
If you want to replace the ROM's I've several romboard pcb's (Angars design)
so you can replace the system rom's by flash memory ( I'm not 100% sure they
work for the 9845A I'll check it)
You should ask Tony nice, if he reverse engineered the diagrams of the HP
9845A yet.. (he did the 9845B already)
-Rik
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Josh Dersch
Verzonden: maandag 22 augustus 2011 8:56
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: HP 9845A service/user manuals?
Hi all --
Anyone have a service manual for the HP 9485A (not the B or C)? I picked
up
three of these machines in fairly good physical
condition just a couple of
days
ago, but their operating condition leaves something to
be desired :).
I've looked in the usual places (hpmuseum.net, and hp9845.net) but I can
only
find the manual for the B/C revisions. My
understanding is that the "A"
version is
different in some ways (not really sure what the
hardware differences are
yet.)
The good news is that one of the three 9845s just required some careful
reseating of the cards and ROMs and it now appears to be working correctly
(I
haven't yet tested the printer (no paper yet) and
I'm assuming the tape
drives
will require a bunch of work, assuming I ever find any
tapes to use). I'd
love to
get the other two running as well, hence the need for
the service manual.
All
three appear to be complete (with I/O, Mass Storage,
and Graphics option
ROMs), now if I could just get my hands on an HPIB interface...
Thanks,
Josh
1:12 p.m.
The HP-IB interface shouldn't be a big problem,
but you'll need a HP 98034B
or a revised A version.
The standard HP 98034A version doesn't support high-speed CS80 drives.
Dos the 9845 support CS/80 drives at all? I thought that to use HPIB mass
storage you needed a 3rd party ROM (e.g. the one from SSI) which is not
easy to find.
If you want to part from one of the machines I would
love to give one a new
home.
If you want to replace the ROM's I've several romboard pcb's (Angars design)
so you can replace the system rom's by flash memory ( I'm not 100% sure they
work for the 9845A I'll check it)
You should ask Tony nice, if he reverse engineered the diagrams of the HP
9845A yet.. (he did the 9845B already)
Alsa I haven't, mainly because I don't have a 9845A. It's not high on my
list of things to look for, alas. If one is offered, I'll accept it with
geatful thanks and reverse-engineer it, but there are other things I
would rather own...
-tony
2:30 p.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Tony Duell
Verzonden: maandag 22 augustus 2011 22:13
Aan: cctalk at classiccmp.org
Onderwerp: Re: HP 9845A service/user manuals?
easy to
The HP-IB interface shouldn't be a big
problem, but you'll need a HP
98034B or a revised A version.
The standard HP 98034A version doesn't support high-speed CS80 drives.
Dos the 9845 support CS/80 drives at all? I thought that to use HPIB mass
storage you needed a 3rd party ROM (e.g. the one from SSI) which is not find.
Yes the HP 9845B does, the manual says it will support the HP 79XX
08/09/10/11/12 but you need the 98413C ROM.
And that makes it not very likely the HP 9845A would because it uses other
ROM's and is older.
-Rik
1:09 p.m.
Hi all --
Anyone have a service manual for the HP 9485A (not the B or C)? I
picked up three of these machines in fairly good physical condition just
a couple of days ago, but their operating condition leaves something to
be desired :).
I've looked in the usual places (hpmuseum.net, and hp9845.net) but I can
only find the manual for the B/C revisions. My understanding is that
the "A" version is different in some ways (not really sure what the
hardware differences are yet.)
I _believe_ the _A is quite diferent from the -B/-C. The last 2 machines
are quite similar (differing mainly in the monitor section, the video
circutiry being inside the monitor).
As I am sure you know, these machines have 2 procesosrs, originally HP
BPOC hybrid modules. One runs the user program (the 'Language Procssor
Unit'), the other handhels I/O (the 'Periperal Processor Unit'). There's
some arbitration logcic to connect these processors to the varios memory
devices.
In the -A, I beleive, the 2 processors are on one PCB, there's a separate
PCB with the arbitration logic on it. In the -B, Each processor anf it's
part of the arbirtration logic goes on a PCB (stlll 2 PCB,s but
differnetly arranged). One advantag of this is that the LPU board can be
replaced by a 'High Speed LPU Option' which is a set of 3 boards stffed
with MAD2900 chips.
Of course the backplane is differnt too.
The good news is that one of the three 9845s just required some careful
reseating of the cards and ROMs and it now appears to be working
correctly (I haven't yet tested the printer (no paper yet) and I'm
I think it'll use normal thermal fax paper.
assuming the tape drives will require a bunch of work,
assuming I ever
The tape drive mechansims are the same as those in the 9815 and 9825, and
suffer the smae problem of a decayed captsn. There are various web pages
giving repairs using things like heat-shrink sleeving or Citroen sleeve
seals.
find any tapes to use). I'd love to get the other
two running as well,
hence the need for the service manual. All three appear to be complete
I am not sure the service manual is a lot of use now. Certainly for the
-B it's a boardswapper guidewith little real inforamtion in it.
Alas the only 90845 I have is a 0945B with the high-speed LPU. And while
I've produced as shcmatic of that, I can't produce them of machines I
don't own :-)
-tony
2:32 p.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Tony Duell
Verzonden: maandag 22 augustus 2011 22:10
Aan: cctalk at classiccmp.org
Onderwerp: Re: HP 9845A service/user manuals?
are quite
Hi all --
Anyone have a service manual for the HP 9485A (not the B or C)? I
picked up three of these machines in fairly good physical condition
just a couple of days ago, but their operating condition leaves
something to be desired :).
I've looked in the usual places (hpmuseum.net, and hp9845.net) but I
can only find the manual for the B/C revisions. My understanding is
that the "A" version is different in some ways (not really sure what
the hardware differences are yet.)
I _believe_ the _A is quite diferent from the -B/-C. The last 2 machines similar (differing mainly in the monitor section, the
video circutiry
being inside
the monitor).
As I am sure you know, these machines have 2 procesosrs, originally HP
BPOC
hybrid modules. One runs the user program (the
'Language Procssor Unit'),
the
other handhels I/O (the 'Periperal Processor
Unit'). There's some
arbitration
logcic to connect these processors to the varios
memory devices.
In the -A, I beleive, the 2 processors are on one PCB, there's a separate
PCB
with
the arbitration logic on it. In the -B, Each processor
anf it's part of
the
arbirtration logic goes on a PCB (stlll 2 PCB,s but
differnetly arranged).
One
advantag of this is that the LPU board can be replaced
by a 'High Speed
LPU
Option' which is a set of 3 boards stffed with
MAD2900 chips.
Of course the backplane is differnt too.
seals.
The good news is that one of the three 9845s just required some
careful reseating of the cards and ROMs and it now appears to be
working correctly (I haven't yet tested the printer (no paper yet) and
I'm
I think it'll use normal thermal fax paper.
assuming the tape drives will require a bunch of
work, assuming I ever
The tape drive mechansims are the same as those in the 9815 and 9825, and
suffer the smae problem of a decayed captsn. There are various web pages
giving repairs using things like heat-shrink sleeving or Citroen sleeve find any tapes to use). I'd love to get the
other two running as
well, hence the need for the service manual. All three appear to be
complete
I am not sure the service manual is a lot of use now. Certainly for the -B boardswapper guidewith little real inforamtion in it.
Alas the only 90845 I have is a 0945B with the high-speed LPU. And while
I've
produced as shcmatic of that, I can't produce them
of machines I don't own
:-)
-tony
You can get the instructions and dimensions (and parts) from me.
-Rik
3:08 p.m.
Many years ago around a friends house we were messing with an HP
computer and the smoke got out
this is before I did any collecting but I did save:-
http://www.collection.archivist.info/archive/DJCPD/PD/2007/2007_04_23_compu…
Is this the cpu from one of those?
Dave Caroline
23 Aug
23 Aug
11:25 a.m.
Many years ago around a friends house we were messing with an HP
computer and the smoke got out
this is before I did any collecting but I did save:-
http://www.collection.archivist.info/archive/DJCPD/PD/2007/2007_04_23_compu…
Is this the cpu from one of those?
That certianly looks like an HP BPC processor module.
They were used in several computers (9825, 9831, 9835, 9845 at least), and
even in some instruments I think. I also think there were sceral
versions, AFAIK the 2 moduels ina 9845 are noit identical (I can't be
sure becasue my 9845B, having the high-speed LPU only has one suck CPU
module in it).
-tony
22 Aug
22 Aug
8:35 p.m.
On 8/22/2011 1:09 PM, Tony Duell wrote:
I _believe_ the _A is quite diferent from the -B/-C.
The last 2 machines
are quite similar (differing mainly in the monitor section, the video
circutiry being inside the monitor).
As I am sure you know, these machines have 2 procesosrs, originally HP
BPOC hybrid modules. One runs the user program (the 'Language Procssor
Unit'), the other handhels I/O (the 'Periperal Processor Unit'). There's
some arbitration logcic to connect these processors to the varios memory
devices.
In the -A, I beleive, the 2 processors are on one PCB, there's a separate
PCB with the arbitration logic on it.
This does appear to be the case, at least from a simple visual
inspection. There is one PCB containing two large heatsinked units,
which I assume are the CPUs.
In the -B, Each processor anf it's
part of the arbirtration logic goes on a PCB (stlll 2 PCB,s but
differnetly arranged). One advantag of this is that the LPU board can be
replaced by a 'High Speed LPU Option' which is a set of 3 boards stffed
with MAD2900 chips.
Of course the backplane is differnt too.
Thanks, I'll drop by an office supply store this week and grab a couple
of rolls.
The good news is that one of the three 9845s just
required some careful
reseating of the cards and ROMs and it now appears to be working
correctly (I haven't yet tested the printer (no paper yet) and I'm
I think
it'll use normal thermal fax paper. The tape drive mechansims are the same as those in the
9815 and 9825, and
suffer the smae problem of a decayed captsn. There are various web pages
giving repairs using things like heat-shrink sleeving or Citroen sleeve
seals.
Yeah, that's about what I figured. Am I correct in guessing that tapes
for these are pretty hard to find, or is there an easy to find equivalent?
I am not sure the service manual is a lot of use now.
Certainly for the
-B it's a boardswapper guidewith little real inforamtion in it.
Well, at least since I have three of these machines to play with,
boardswapping is at least an option (though I know it's not your
favorite :)). I've done some basic testing of the power supplies and
they all appear to be working nominally, so at least those're good --
any preventative maintenance you'd recommend for the supplies in these?
Alas the only 90845 I have is a 0945B with the high-speed LPU. And while
I've produced as shcmatic of that, I can't produce them of machines I
don't own :-)
Well, I'd be happy to send you one of mine, but I'm guessing the
shipping across the pond would be prohibitive :).
Thanks as always,
- Josh
-tony
23 Aug
23 Aug
12:16 p.m.
In the -A, I
beleive, the 2 processors are on one PCB, there's a separate
PCB with the arbitration logic on it.
This does appear to be the case, at least from a simple visual
inspection. There is one PCB containing two large heatsinked units,
which I assume are the CPUs. The tape drive
mechansims are the same as those in the 9815 and 9825, and
suffer the smae problem of a decayed captsn. There are various web pages
giving repairs using things like heat-shrink sleeving or Citroen sleeve
seals.
Yeah, that's about what I figured. Am I correct in guessing that tapes
for these are pretty hard to find, or is there an easy to find equivalent? From what I remammeber the tape are not pre-formatted.
They;re the same
tapes as are used in the 9825, 9815, 85, etc. Not common but not
hard to
find eitehr. You cna use TU58 tapes, but this destroyes the clock trakcs
on said tapes makingthem useless for the original applciation in the DEC
drive. TU58s are not that common either.
Somewhere I read of a failry simple hardware mod (change a resistor o
nthe tape drive PCB I think to iuclrease the write current to use a
higher coercivity tape in the same type of cartridge. I've never tried it.
I am not sure the service manual is a lot of use
now. Certainly for the
-B it's a boardswapper guidewith little real inforamtion in it.
Well, at least since I have three of these machines to play with,
boardswapping is at least an option (though I know it's not your
favorite :)). I've done some basic testing of the power supplies and
they all appear to be working nominally, so at least those're good -- any preventative maintenance you'd recommend for
the supplies in these?
Alas I think you're right. The -B at least is a large and hevy machine,
and I asusem the -A is similar. Maybe one will turn up over here
(although a -C would be more interesting to me, I'd love tolook at that
colour video boardwith the 2903s on it).
-tony
Alas the only 90845 I have is a 0945B with the high-speed LPU. And while
I've produced as shcmatic of that, I can't produce them of machines I
don't own :-)
Well, I'd be happy to send you one of mine, but I'm guessing the
shipping across the pond would be prohibitive :).
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