-------------- Original message from David Griffith <dgriffi at cs.csubak.edu>: --------------
>
> Someone some time ago said that he has some AT&T Unix PC mice. Who was
> that? I'd like one.
>
> --
> David Griffith
> dgriffi at cs.csubak.edu
I second that. Ihave need one for a while
- Jerry
Jerry wright
g-wright at att.net
>But given what you said, it could be that all the packs, including the
>DEC ones have been bluk-erased :-(
I wish you hadn't said that :P
Only way to find out is to try it when the replacement arrives.
Meanwhile I also looked at the platter hub. The DEC cartridge has
40 slots evenly spaced around its circumference, whereas this
Memorex pack has only 8, one of which is a "double", presumably
for indexing. As the RL drive uses a reluctor pickup on this area
to sense disk rotational speed (among other things), there is no
way the Memorex would have ever worked in an RL...
>There is no way to rewrite the servo information using a normal RL drive.
Is there anyone out there who has hardware capable of reformatting
these packs i.e. rewriting servo tracks?
-Charles
Question
I have a CS3 with a PerSci dual 8" internal drive that does not
recognize/respond when a disk is inserted in drive A, but drive B does
respond when a disk is inserted. Drives C and D are empty. The PerSci
dual 8" drive is the model with the one belt/on-board controller shared by
the two drives. When working correctly, the drive has a mechanical lock
that detects the insertion of the disk, engages the read head, and holds
the diskette in place. No latch arm needed. There are 4 buttons on the
front, one for each drive (A,B,C,D) - If you push the corresponding button
and there's a disk in the drive a motor ejects the diskette
automatically. Pretty cool for a 1979 micro.
Do the diskette detect sensors go bad on these?
Next I tried and failed to get a RDOS monitor prompt, although I followed
the dip switch settings as instructed in the manual. The drive controller
has the RDOS ROM.
I did all of the standard things, re-press the IC's, re-seat the cards,
etc. The system is in very nice shape, no corrosion or scratches.
I feel that I have nailed down the problem to being either the drive, the
drive controller, or the terminal. Through a process of elimination I will
attempt to replace each component in question (except the dual drive, I
will probably put in Tandons instead if I can. I have a head start, the
entire system came together in one donation so I was able to record how it
was all cabled together, and I can assume it worked once as-was. Also
included in the lot was Fortran IV and CDOS software. The printer is a
Texas Instruments Omni 800 / 810 RO Terminal. I was told the system cost
$15,000 new in 1979. A pretty sweet personal computer.
PICS: http://www.vintagecomputer.net/cromemco/system_three/
> manuals from a PDP-4. Yes I said "4". How rare are these ... Al K.?
Paper copies aren't common. Most of the material has been scanned.
The 4 is the first of the 18 bit series that ended with the 15. It was
the first DEC computer to ship after the 1.
Anyone know where to find a copy of the manual for a CMD CQD-200 QBus
SCSI controller?
Bitsavers has a manual for the CQD-220, which looks fairly similar, but
I'd like to find the exact manual if possible...
Thanks!
Josh
Hi all,
can anybody point me to a "working" pdf-version of the IPB-document for a HSC50 called EK-HSC50-IP-00x ?
There are pdf-copies from the DEC MDS online on the Manx-website, but unfortunately, most of the diagrams are missing there. Same for the mirrored copies...
The reason for asking this that I saved such a unit before the scrappers could get it, and I need to figure
out how to take apart the locked front door of the chassis. The key is missing...
Any help is apprechiated!
Kind regards,
Pierre
______________________________________________________________________________
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I remember a discussion a long time ago but not much of it.
Would there be anyway to hook up a 5-1/4" diskette drive to a modern
day computer running any version of Windows?
Have a number of things that I would love to convert to 3-1/2" or put on CD.
The two machines that I have up and running are Windows 98 and Vista
Ultimate. I also have an older Thinkpad 500 running Windows 3.1
So, I'm going to be spending a few days out in the San Francisco area
before VCF (I'll be there Weds afternoon through early Monday).
Can anyone suggest other (non-computer) related things to do while I'm
out there? Or if anyone wants to show off their collection of big
iron, that might be interesting too. :)
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
I'm looking for an S100 chassis in which to mount my WAMECO system.
I have power supply, mother board and component cards but I'm looking
for a chassis with a front bulkhead for attaching the WAMECO front
panel. The WAMECO components are drop-in replacements for the IMSAI
bits. The distinguishing characteristic of the chassis is that the
motherboard actually extends thorough the front bulkhead to receive the
front panel. Slot one is offset by an extra 1/4" to accommodate the
front panel.
In addition to IMSAI, boxes of this type were manufactured by TEI and
Integrand and maybe a few others.
I don't need the top or any electronics - just a bare chassis with card
guides.
Any help is greatly appreciated.
Thanks,
Jack
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