I have found that a modernish Dell PC (win 7 era) when attached to a m4
9914 tape drive has issues when attempting to read 800dpi 9track tapes.
I/O errors that seem to be centered around variable block size microcode of
the modern scsi controller (?)
I've spent a number of hours on it and I could not even pull raw data off
an 800dpi tape. 1600 no problem. works fine.
is there a tweener box or scsi controller that will work in this situation?
what do other people do?
Bill
On 6/20/2026, ben <bfranchuk(a)jetnet.ab.ca> wrote:
> PL/1 and C are the only two high level languages a operating system is
> written in, that I can think of that are well documented, and easily
> found on the WEB.
Additional examples:
Pilot (the embedded operating system for the Xerox Star office
automation system) was written in Xerox's proprietary Mesa language.
History and documentation of Mesa (and some Pilot documentation and
early source code) are available here:
https://softwarepreservation.computerhistory.org/mesa/
Taos, the operating system for the DEC Systems Research Center Firefly
multiprocessor workstation, was written in Modula-2+, which added
threads, garbage collection, and runtime type dispatch to Modula-2.
History and documentation of Modula-2+ (and Taos) are available here:
https://softwarepreservation.computerhistory.org/modula2+/
SPIN, an extensible operating system written at the University of
Washington, was written in Modula-3 (with small extensions). History and
documentation for Modula-3 are available here:
https://softwarepreservation.computerhistory.org/modula3/ and
information on SPIN is available here:
https://softwarepreservation.computerhistory.org/modula3/#SPIN_M3 .
Anyone here have an interest or need for a HP13394A removable disk
pack? I stumbled across it in a garage cabinet at an estate sale.
According to google, it was used in a HP7920 disk drive system with
early HP mini processors. Before I post it on THAT website, figured I'd
check to see if anyone here could use it. Unit seems in fairly good
shape - at least physically. Please respond off-list if interested.
Steve Shumaker
UNCOL failed because of many reasons, none that I know of.
I put the blame on hardware design,throw some logic and memory together
CHEAP,QUICK and DIRTY and call it a computer if you can sell one.
Call it a computer standard if it for a PHD.
Today's memory is loosely based on 8 bit byte addressing, yet there
is no Mathematical abstract model to base the computing side of the
picture. What are the problems that need to be solved? What are the real
world hardware problems like I/O? Are things defined recursivity, in
that a simple version, can expand to a complex, and really complex
version. Register addressing,base register addressing, array, base
register addressing ... Algol 9000.
UNCOL is from the era, that it was thought lower cost hardware as gates
and memory it would possible have general purpose computer of 32K words
or more. 36 bits or bigger word length for single precision floating
point. A character set of LATIN upper and lower case letters,and a
limited ALGOL 60 character set, like '10' and 'BEGIN' keys.
The RLV12 (RL02 drive controller) in my PDP-11/23+ has decided to quit
working when it gets hot in the room.
RT-11 won't boot, with an ERR 15 Controller Error.
The defect may have become permanent, will have to check in the morning
when everything's cool.
The drives themselves are not indicating any faults, and both of them
exhibit the same behavior on boot.
Trying to rig up an emulator (or boot XXDP from the Teac 3.5" floppy)
introduces a whole new set of hair-pullers.
Since the RLV12 is so complex, I am tempted just to replace it, if one
can be had... so does anyone have one they don't need? :)
thanks
Charles
Anyone do any real work with either the Icon or Unicon language family? I recall fondly sending off for a 1/2" tape with an early Icon distribution from the University of Arizona. I played around with it personally, but never got to use either professionally.
Darn - my beloved Planar ELT320 terminal has died. I was just sitting
there using it and suddenly the screen went blank. The keyboard still works
and the power LED lights, so not a simply power supply failure.
Does anybody have a schematic or service manual for these guys? It's one
of my favorite terminals - not only does it have a beautiful orange/amber EL
display, but it's also way smaller and lighter than any VTxxx terminal of
the era.
Thanks
Bob
Hello!
Last year I rescued a HP 2116B that was going to be scrapped. It has been
in storage for quite many years but now the storage building was going to
be demolished and a quite urgent rescue operation took place.
The machine is now sitting and waiting to be restored to operational
condition.
When examining the machine it was quickly discovered that it was lacking a
few boards.
Notably the Memory Module Decoder board which goes into slot 2 and the
Power fail board in slot 1 were missing.
When I pulled out the card cage to examine the PSU it turned out that also
the two regulator modules for the PSU were missing.
Since I received the machine I have been able to find a Power Fail board on
Ebay, but three boards are still missing:
Memory Module Decoder (02116-6274 or 02116-6300)
Logic Supply Regulator (02116-6014)
Memory Supply Regulator (02116-6015 or 02116-63214)
Is there anyone here on the list that happens to have these spare boards or
a HP 2116 that is beyond repair? I have been thinking of replicating these
boards but it would be nice to find the original and spend the time on
something else than tedious replicating work.
Reading a 12 year old cctalk thread I saw that Tim Riker had an HP 2116 in
not so good condition once upon a time. I wonder if there is anything left
from that one?
/Mattis
I bought one of Vince Slyngstad's PDP-8 Omnibus 32Kword board kits
(battery backed-up RAM) a few years ago. I assembled it and it worked as
designed.
(I had an 8/A with 32K of actual core so I didn't use it other than a test).
Having sold my PDP-8/A system and not contemplating owning another, I'd
like to sell this board to someone who could use it.
But I have no idea what it's worth... make me an offer, or at least
recommend a price?
thanks
Charles
