This is a classic HP currently on Ebay, a decent 2116C model. Item is
290099957210
What is so special about it, besides the obvious? Seller updated the auction
listing with a card list. It appears to have two of the (rare) 12920/21 mux
sets (32 ports), something that is required for all versions of TSB. I'd be
willing to trade a nice mux panel for them in exchange for one of the two
mux sets ;)
Jay
I've been converting some of the .TD0 image files that various people
have sent to me into .IMD format using the tried and true "write it
to a disk with Teledisk, and read it back in with Imagedisk" technique.
This works, but gets tedious as you need to keep starting/exiting
Teledisk and ImageDisk, remember which file you are working on over
the time it takes to read/write the disk, and worst of all, write
down the comment record from the Teledisk screen and manually enter
it into ImageDisk when creating the disk.
Got tiring rather quickly... So I wrote a new utility which might
be handy to anyone else wishing to convert images:
TD2IMD automates much of the process of converting Teledisk .TD0
images into Imagedisk .IMD format. It builds a list of all .TD0
files specified (you can use '*' so "TD2IMD *" does all .TD0 files
in the current directory), then launches Teledisk and Imagedisk
in turn allowng you to write/read the disk. With a single keystroke
TD2IMD will enter the filename into Teledisk, then capture the
comment record displayed on the screen and place it in an empty
.IMD file of the same name. After you finish with Teledisk, it
automatically launches Imagedisk, and also with a single-keystroke
enters the filename. Imagedisk reads the comment from the empty
.IMD file, lets you edit it if you wish, then reads the disk into
the file.
Goes MUCH faster!
TD2IMD is available on my site, go to the software page, then
pick "Teledisk", and look for TD2IMD on the subpage.
Regards,
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html
Jay,
----- Original Message ----
I distinctly remember two of the projects. One was on the
working of the heart. It was a board that tilted front to back on a
triangular wedge. Routed into the board was a logical diagram of the human
heart. The valves were one way metal flaps that opened by rotating on a thin
metal shaft or wire. The blood was a set of marbles. When you tilted the
board to the back, the marbles rolled through the valves in one direction,
then when you tilted it back the other way the flaps only let the marbles go
into the correct chambers.
---
I remember that!!! I wanted to build it, but for any number of reasons didn't. For a long time now I remember associating the marbly heart with my ESR Dr. Nim toy, which used marbles to play the game of Nim.
What I don't remember is which I came across first- Dr. Nim or the Marbly article.
The idea of using marbles, tilt boards, gates, has been tucked away in my brain to some day emulate **something**.
Scott
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I hope you don't mind me asking as this is not a tech quiestion per
se, but if anyone in the world will know the answer it will be this
group.
I'm looking for a book that I rented from a library in 1973 or 1974
on computers. In the back of the book it has plans for building a
computer out of basic components, including a telephone dial for
input. The output is shown on lights and I remember there being more
than a few bulbs. The "computer" probably does nothing more than add
numbers. I use the book to research and write my 8th grade science
paper and then I tried to build the computer for my 8th grade project
but could not complete it at the time. Now that I'm older and wiser I
figured I'd try again.... (mid life crisis?)
I don't remember any ICs. It was pretty simple electrical components.
Anyone know the title or author of this book?
Thanks.
Paul
Anyone know if NeXT monochrome slabs have dual SCSI buses (one internal and
one external) or not? I've got one here that resolutely refuses to talk to any
internal SCSI device [1], but will happily talk to (and boot from, if
necessary) external devices. In fact, if anything is plugged into the internal
bus at all then the system won't even boot from an external device.
I've ruled out internal cabling, internal power connector, something shorting
the PCB underneath, and an actual device fault - which means it's possibly a
bad solder joint somewhere or a cracked PCB track. However, *if* the slabs
have two separate SCSI buses then it's possible that there's a fault with the
actual controller too which is knocking out the internal bus.
[1] Actually it "talks" in that there seems to be some device activity, but
always falls over with a (useful!) "SCSI error" message whenever there's an
internal device present.
I'm not too fussed as the colour slab works and this one works too (albeit
hanging the drive off the external connector), plus we've already got a good
mono slab at the museum. It'd just be nice to get to the bottom of what's
actually broken!
cheers
Jules
On 22 Jan 2007 at 16:49, Fred Cisin wrote:
> The AT started in 1984. Some areas (both geographic, and social)
> immediately went for it, and some put it off as long as they could, since
> the IBM/MICROS~1 software didn't provide any real incentive to upgrade
> other than high density drives and a little faster;
> until Windoze 3.1 and OS/2.
More than a little faster, at least to my recollection. Something
like 3 times as fast. 16 bit disk I/O and a CPU with nearly 4 times
the transistor count of the 8088. A lot of folks who bought the
original 6 MHz PC AT discovered overclocking.
While you could find 8 and 9 MHz 8088/8086 systems, neither came
close to a 6 MHz AT in terms of performance. And if you were
adventuresome and clocked that PC AT at 12 or (I've heard it was
done) 20 MHz, the gains were breathtaking--and you had a convenient
place to cook lunch.
One thing that IBM did that really toasted me back then was messing
up on the 8237 DMA controller hookup such that memory-to-memory DMA
didn't work. It could have made the whole business of extended
memory use a lot simpler.
Cheers,
Chuck
Today I started stripping out good parts from a Convex C240
minisupercomputer - a machine I had purchased from a scrap dealer
almost ten years ago. It was a disaster of a deal - one of the rare
times I feel I was screwed my a junkman. The machine turned out to be
missing many parts, including processors and power units, cables were
chopped, memory was swiped, plus there was mouse crap evident - yuck.
For years I have been threatening the part it out, and now is the
time.
A few parts will end up on Ebay, the metal will go to the scrapyard,
and I am keeping the boards that I have for now. I know Convex
machines are not very common, but if there are others that need spares
for 200 series machines*, please let me know, as the boards and
(hopefully) backplane will be for sale.
* A guy I know that worked at Convex said the processors should mostly
interchange - although a rev level problem might pop up.
--
Will
I'm looking for old Honeywell ads running from 1964 to 1978 showing the
various animals made from computer parts/chips. I was just given a set of
pewter animals that Honeywell had made to give away showing some not all of
the 100 animals made for the ads. I would like to have copy the ad that goes
with each of the animals that I got today. I got one good ad from this site
today http://www.dvq.com/oldcomp/oldads.htm , so if anyone can point me to
other it would great.
John
> If you can avoid two analog generational losses
There is NO "analog generational loss" in what he is doing,
since the transfer is using saturation recording.
big box of 5 (1 missing). Black on 2 sides, I-B-M in
green, magenta, and blue. Box is blue on other 2
sides. One blue side has a "flap" torn back. Sorry,
camera batteries were discharged.
Individual ribbons are wrapped in cellophane I guess.
For shipping :)
Part No.: 1010730 C
Inking: 50 "Clean Clip"
Color: Black Record
Grade: Superior Life Nylon
There were 2 responders, and I'll honor their desires
in the order they came in. I simply post the
information publicly in case someone loses interest,
and someone's interest in suddenly piqued!
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