At 11:01 24/06/2004 -0700, you wrote:
>Hi
> Check the termination. Make sure that only one
>of the drives has a terminator and that it is
>the correct type for that kind of drive. It
>is prefered that the terminator is on the last drive
>in the string but I've never seen problems when
>the drives are side by side.
>Dwight
The Morrows use a very odd termination scheme - both
drives have terminatore, and both drive have separate
drive cables, going to two different (and spaced fairly
far apart) connectors on the mainboard.
I've tried all combinations (both in, one or the other in,
both out) - always fails on the TEC drives, always works
with the Panasonic.
I would really like to keep the TEC's in it, as they are
original equipment, and the serial #'s match the assembly
manifest sticker inside the unit.
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
Dear Pierre.
We are interested to have your Unisys System80, specially base unit and HDD.
Can you tell me the model type and the HDD models that you have ?
Thanks
Pierluigi Spina
Makers - System Division
Italy
mailto:p.spina@makers.it
At 12:10 AM 6/20/04 -0700, you wrote:
>
>the other fun companion to this set is the yearbook that came out at the
>end ..... it is like they turned the time life photo journalists loose and
>lots of building plans lots of text.... really fun!
Ed,
Can you tel lme more about the year book including it's exact title. I'd
like to try and track one down. Getting the Rad Lab books has been easier
than expected. I've got over half of them already on their way here
including several with original dust jackets and all of them are from the
original McGraw Hill series. I'd still like to see a list of the extras
that you have and what you want for them.
Joe
Hello Wayne --
I am contacting you to see if you still have these (2) cartridges available?
If so, I'm interested in acquiring them.
Looking forward to hearing from you,
Paul @ MBC
Paul H. Brown
Monterey Bay Communications
1010 Fair Avenue
Santa Cruz, CA 95060
(831)429-6144
(831)429-1918 fax
www.montbay.com
paul(a)montbay.com
>From: "Gerold Pauler" <gerold.pauler(a)gmx.net>
>
>Dwight K. Elvey schrieb:
>> Hi
>> You need to reset the keyboard first by twisting it to
>> match up to the same angle. Once that is done, you jam
>> a screwdriver blade into the slot of the H to push against
>> the spring and get it reinstalled.
>> Hope this makes sense.
>> Dwight
>>
>
>Sometimes (depending on the position of the distributor)
>you can get a better fit by pressing a key on the keybord.
>Thus giving the universal lever more space to move.
>
>- Gerold
>
>
Hi
He should try both and also rotate the motor to
try to match with the keyboard.
Dwight
Hi tony,
>> I thought that perhaps they were 80 track drives or some such,
>
>Are there any letters after the FD-503 part of the number? In general
>Teac suffixes tell you the number of heads and cylinders.
Is TEC (Tokyo Electric Company) TEAC?
No extra letters - I'm pretty sure they are standard 40 track drives,
but I have not been able to dig up any hard info so far.
>> Does anyone know anything about these drives? Are they 80 track
>> or otherwise "odd"? Are they known to have a high failure rate
>> (especially with age)? Any info would be appreciated.
>
>Does the disk rotate? Does the head seek to cylinder 0 at power on? Have
>you tried looking at the ReadData line on the interface connector with a
>'scope or logic analyser?
Drives spin and seek - everything looks normal except that they reseek
a couple of times and then report an error - haven't scoped the read data
yet (this weekend).
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
The MIT Swapfest, also known as "Flea@MIT" is a great event. I lived in Boston
for four years, until last month when I moved, but I went to the swapfest many
times and always found interesting things. There is a small-ish outdoors area
and a huge indoors area. There are even people selling snacks (usually
doughnuts and barbeque food, coffee and Coke) by one of the entrances. LOL,
just don't do what I did the first time, and think the small outdoors part was
the whole thing!
Hi
You need to reset the keyboard first by twisting it to
match up to the same angle. Once that is done, you jam
a screwdriver blade into the slot of the H to push against
the spring and get it reinstalled.
Hope this makes sense.
Dwight
>From: "David V. Corbin" <dvcorbin(a)optonline.net>
>
> Aargh.....
>
>In the continuing quest to get my ASR-33 operational, it was discovered that
>the typing unit had shifted at some point and the h-plate connecting the
>typing unit back to the keyboard had popped out [I actually "found" it
>laying in the bottom of the case under the typing unit.
>
>Although the lever from the typing unit is spring loaded, I can not get the
>h-plate in. The connection levers are at different angles, preventing the
>h-plate from properly being inserted. Although I can move the levers a bit
>manually, I can not get them to rotate such that they are in the same plane.
>
>If anyone has any ideas, please contact me ASAP.
>
>I am pulling my hair out.
>
>David
>
>Ps: To all attending the RI Picnic or VC Feast. Beware the tall, thin, bald
>guy with a mustache. [unless of course he gets is ASR-33 running before
>then]....
>
>
Hi
Check the termination. Make sure that only one
of the drives has a terminator and that it is
the correct type for that kind of drive. It
is prefered that the terminator is on the last drive
in the string but I've never seen problems when
the drives are side by side.
Dwight
>From: "Dave Dunfield" <dave04a(a)dunfield.com>
>
>Picked up 6 Morrow MD computers this past weekend.
>
>All appear to work, however I have one with floppy drive
>trouble ...
>
>The drives in question are TEC FB-503 1/2 height 5.25"
>drives. Only one of the machines has these drives.
>
>What is odd is that both drives in the one machine will
>not read diskettes (report disk error - won't even boot).
>
>Only one machine has these drives - when it failed to boot,
>I first tried cleaning it - no improvement - then tried
>swapping for 'B' drive - still no improvement - now thinking
>that diskette controller is faulty.
>
>Then I swapped in a Panasonic drive from my parts shelf, and
>voila - boot & access disk no problem.
>
>Seems really odd that two identical drives would fail so
>completely in the same way when all of the other 10 drives
>appear to be OK.
>
>I thought that perhaps they were 80 track drives or some such,
>however Issue #1 of the "Morrow Owners Review" has an artical
>about the floppy drives used in the MD's, and it lists the
>TEC/NSA 5503, which looks like these drives - Can't say for
>sure if they are the same ones, as the model number stated does
>differ slightly from what is on the drive plate, but if they are
>the same, the artical makes no mention of anything special about
>them...
>
>Does anyone know anything about these drives? Are they 80 track
>or otherwise "odd"? Are they known to have a high failure rate
>(especially with age)? Any info would be appreciated.
>
>Regards,
>
>--
>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!
Would anyone happen to have documentation on this
drive that they could share with me? In particular, I am looking
for a description of each of the DIP switch settings on the rear
of the unit (Google was not helpful -- perhaps I have the only
one of these ever *built*? :< ) Drive works, I would just like
to see what *else* it can do (e.g., the laundry, balance my checkbook,
mow the lawn...)
Thanks!
--don
