Any one know anything about a Xerox 6060. I've got a free one to pickup
tomorrow and I'm wondering what it is and is it worth the effort. It's
set up with a 10/10 Bernoulli box too. There doesn't seem to be much on
Google about it as Xerox also uses 6060 as the model number of a large
digital printing press.
James
--
www.blackcube.org The Texas State Home for Wayward and Orphaned Computers
>1) This machines has a large board on top of the mainboard - this board plugs
> into the Z80 socket (the Z80 moves to the top board), as well as a ROM
> socket and the monitor connector - there is also a bunch of "flying leads"
> which connect to various points on the mainboard and attach to a socket/header
> on the top board...
>
> Can anyone tell me what this board is? Is it "normal" on an Osborne-1?
> Neither of my 1A's have this board, and the mainboard appears to be the same...
> Is it perhaps an upgrade of some kind?
>
>2) Has anyone disassembled or otherwise obtained source code to the Osborne
> boot ROM - I would like to try and figure out how far the machine is getting,
> and what it is doing when it restarts.
>
>3) Has anyone seen this behaviour in an Osborne before?
Ok - I've figured just about everything out! ...
The board on top is an 80 column adapter.
The Boot rom listings are in the technical manual (duh!)
The problem with this Osborne is the keyboard! - It is apparently sending a
false key, which is causing the O1 to clear/redraw the screen.
Unfortunately, the keyboard does not look very servicable ... anyone successfully
fixed one of these things? (membrane matrix).
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
After the 1A monitor started working, I turned my attention to another
Osborne in need of attention. This is an Osborne-1 - the older one in a
"tan" colored case - not a 1A.
This machine "sort of" works - it powers up, beeps, and displays the
"box" on the screen, along with the "Insert disk in drive A and press
RETURN" message.
At this point however, it seems to keep restarting - the screen continually
clears and redraws the box/message, which creates a flickering effect.
It does not beep as it restarts - experimentation shows that the beep is
enabled at power-up and gets turned OFF by the firmware as part of the init
sequence - it appears the the firmware does not actually turn the beeper ON
at startup, just OFF, so it only beeps after the first power-on (?)
Took it apart and checked all contacts/connections/sockets for corrosion,
reseated everything and still the same operation.
A couple of questions:
1) This machines has a large board on top of the mainboard - this board plugs
into the Z80 socket (the Z80 moves to the top board), as well as a ROM
socket and the monitor connector - there is also a bunch of "flying leads"
which connect to various points on the mainboard and attach to a socket/header
on the top board...
Can anyone tell me what this board is? Is it "normal" on an Osborne-1?
Neither of my 1A's have this board, and the mainboard appears to be the same...
Is it perhaps an upgrade of some kind?
2) Has anyone disassembled or otherwise obtained source code to the Osborne
boot ROM - I would like to try and figure out how far the machine is getting,
and what it is doing when it restarts.
3) Has anyone seen this behaviour in an Osborne before?
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Hi Tony,
>I would start by tracing the horizontal drive signal. My guess (without
>seeing it) is that the 555 is part of the vertical circuit and can be
>ignored for the moment. You may find the horizontal drive signal goes to
>the base of the drive transsitor, transformer coupled to the base of the
>horizontal output transistor, thence to the flyback.
Thats pretty much exactly the circuit --- This monitor is not designed to
be very easy to work on - there's a metal plate right under the circuit
board, and the other side of the board is right up against the neck of
the CRT - makes it pretty hard to take measurements in circuit.
This afternoon, I pulled it all apart, checked continuity through the
flyback, and pulled the horizontal drive transistor and checked it - it
appeared to still be a transistor (correct "diode" junctions from both
B-C and B-E).
So - I put it back together, planning to leave it for another day - on
a whim I tried it, and it worked! - And I used it for a couple of hours
as I checked out the rest of the machine with no further problems.
I still have no idea what the problem was - perhaps a bad contact in one
of the connectors, although I wiggled and jiggled everthing and was unable
to deter the monitor for working perfectly after I put it back together.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Hi Guys,
I have an Osborne-1 with a bad monitor - I have the technical
manual, which gives schematics for the main logic board and
the disk board, but NOT the monitor.
The monitor is a: Zenith model DS5NF3
Symptoms are:
Its Powered through a single +12v line on the connector,
filiment lights, which suggests power is present.
Horizontal drive, vertical drive and video signals are all
present on the monitor connector.
No light at all, no "buzz" typical of flyback transformer.
Looks like horizontal/high-voltage circuit is dead.
Unfortunately I have no schematic - At least the only IC on
the board is a 555 - hopefully no unobtainium used in this
one (unless it's the flyback :-(
anyone got diagrams or other service information on a
"Zenith DS5NF3" monitor.
Suggestions/debug hints welcome - I'm guessing horizontal
output transistor or flyback ...
[and before anyone asks - yes, this is the one which was
missing it's monitor plug, however I have borrowed the plug
from a working machine and verified that the signals are
getting to the monitor]
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Greetings.
I have a PDP-11 H960 rack (empty BA23's) and some Fujitsu Eagles in
storage, which must be removed Monday. There are also some Pets, I
think, which are 2nd generation models, i.e. 8032's.
It is time for most of this gear to find new homes. I could use a
helping hand on Monday to load the truck. First on scene gets first
dibs on goodies, and I'll drive the truck reasonable distances from
LAX.
If you are interested, please contact me immediately with a phone
number.
Regards,
Eliot
----------------------------------------------
Mailblocks - A Better Way to Do Email
http://about.mailblocks.com/info
Anybody interested in a Gould Biomation model 1650-D logic recorder?
I comes with 11 probes, but no manual.
On top of the unit is a model 116 display AY control mounted.
Picture of this device at 'www.groenenberg.net/pic/MSC/biomation.jpg'
I prefer to swap it for some PDP related stuff btw.
Ed
--
edward(a)groenenberg.net | Collector of PDP-11's.
http://www.groenenberg.net | Politici zijn vieze oplichters.
Unix Lives! M$ Windows is crap.
'97 TL1000S
Recently picked up an Osborne-1 which is missing it's video jumper
plug - this is the small block to the right of the keyboard connector
which enables the internal monitor, and is removed to connect an
external monitor.
I know I can make one - but I thought I'd check here to see if anyone
has a "parts" or beyond-repair Osborne that might have a spare of the
original jumper block.
This is an Osborne-1A - the second edition, however I believe the jumper
block is the same on both versions.
Thanks,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Al pointed me to some information about the Flexowriter on Herb Johnson's
website. It seems that the Flexowriters have been around since at least WW
II and was orignally made by Commercial Controls. CC was bought out by
Frieden sometime doing the 1960s. The original Flexowriter only had a PT
reader and punch and no external I/O and was used for generating form
letters. Notable, It was used by the US government to write letters to
relatives who lost family members in WW-II. Later new models were created
by adding interfaces and a 2nd punch and 2nd reader. The two machines that
I have appear to be original Commercial Controls FL models without the
external I/O interfaces. Oh, I'll throw in a bit more history about these
two particular machines. These two originally came from the US Air Force
Missile Test Range. Anybody remember what that was? It was the original
name for what is now called Kennedy Space Center. Originally just called
Cape Canaveral after the geographical feature, it was used as a missile
test range starting in the late 1940s and was called US Air Force Missile
Test Range. The name was changed to the US Air Force Eastern Test Range
about 1959 when NASA choose it to be the site and their manned launches and
it was renamed to Cape Kennedy after the death of President Kennedy in
1963. Footnote: Not many people realize it but the Cape Kennedy name was
not officially recognized so the land is still Cape Canaveral but the
facility was officially named Cape Kennedy in 1963 and is currently named
the Kennedy Space Center. Another footnote: For many years I worked for
Martin Marietta in Orlando Florida. The Orlando facility was originaly
built in 1958. MMC chose Orlando due to it's location close to to the
Missile Test Range at Cape Canaveral since they originally planned to buid
the Pershing missiles here and test fire them from Cape Canaveral.
Herb has a short interview with an X-Flexowriter repair/salesman posted
on his site at <http://njcc.com/~hjohnson/s_flex.html>. For anyone that's
interested.
Joe
