I'm new to the list and missed the original posting about the Friden delay
line. Can somebody forward to me the messages that have been crossed in
regards to the Friden calculator or tell me where can I search for old
postings?
Thanks!
James Redin
----------
> From: Allison J Parent <allisonp(a)world.std.com>
> To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
> Subject: Re: Delay lines
> Date: Friday, March 20, 1998 11:27 PM
>
>
> <Exactly. In the particular case of the Friden it was called a supersonic
> <delay line, although I've never been sure why.
>
> acoustic delay lines, they propagate bits translated to mechanical
> impulses at the speed of sound in a solid. The resulting delay is
> long enough to use ans a shift register to store bits.
>
> Allison
>
Hmmm,
The Goodwill pickings were bad. I only found one C128 and two
1571 drives, plus a 1084 composite monitor. The store manager wanted
$25 for _each_ item ($100 total?? BAH!). The C128 had several broken
keys, the Disk drives looked in pretty bad shape, so the only thing of
interest was the monitor. I took it. I also got some cables: a TTL
RGB cablefor the 128, A standard "monitor" cable and what looks to be
a drive cable (hey, they were willing to bundle it in for me).
So, the question is: can I use the 'split' composite cable for a
C64 with an Atari 800? By 'split' I refer to split chroma and
intensity signals... I know that the 1084 monitor can handle this, and
I know that the Atari outputs this format just like a C=64, but I
_don't_ know if the pinouts are the same between the two. Can anyone
help?
Thanks!
J. Maynard Gelinas
Sorry to go on and on about PC stuff, but I do need help.
I got a copy of Harvard Graphics 2.01 for DOS. I'm not sure if it
was my fault or not, but I damaged Program Disk 1. Scandisk reports
that cluster 0 is damaged and the disk cannot be fixed. I can view
the directory of the disk (5.25"), but the files are inaccessible.
Could someone either tell me how to fix this disk or send me another
one? (diskimages would do_)
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
<Let me think... The 286 chip was available in 10MHz and 12MHz IIRC, mayb
<another speed too. I can't remember which speed the 50/50Z was.
The installed chips are 10mhz but that does not mean it ran that fast.
<Don't you love the way the case comes apart, and that little tool
<underneath the speaker to help take the rest of it apart? Defintley my
They do come apart nice.
But everything is oddball compared to the rest of my systems (s100, CPM
and DEC based).
Allison
Hello Frank,
> maybe the definitions of computer/calculator are not exact; the Mk8 is
> stated as "first electronic desktop calculator" in
> "Bueromaschinen-Kompass", an annual handbook giving an overview on the
> market.
> I guess, what quilifies the Anita is the fact that it used Nixie-tubes
for
> displaying the results. A book, written 1960, titled "Electronic
> number-calculators" describes the display of results as the largest
> problem, the author had no idea of a practical solution (but describes
> every other technology used these days: core-Memory, delay-lines, tubes,
> even diodes and transistors).
> Regards,
> Frank Boehm
Yesterday I subscribed to a new list (Discussion re-collecting of classic
computers) hoping to get more info on the Nixdorf machines. The first
messages that came across were an ongoing discussion on the boundaries
between calculators and computers. It was very interesting for me. One of
the entries stated:
"Granted, these points are primarily moot, for the definition of a computer
as to be used on this list would need to be defined by Mr. Bill Whitson,
the (still) owner of this list.
>* must be programmable
>* must be general purpose
>* must have alphanumeric input capabilities
>* must have alphanumeric display capabilities."
Of course many current calculators would be considered computers under
these terms, however, we need to consider the context or frame of reference
for this definition. The list is oriented to "Classic computers" and
therefore the boundaries are relevant to the early computer/calculator
technology.
On the other hand, the fact that the ANITA would qualify for the first
electronic calculator because it was the first one with Nixie-tubes display
is not very clear either. Remember that the first pocket calculator, the
"Cal-Tech" from TI and its off-spring the Canon "Pocketronic" used a
thermal printer to display the results.
I would say that the terms above stated leads to a clear cut between
Computers/Calculators.
Now the real question should be:
Does anybody know if the ES 12 and ES 24 electronic calculators developed
by Nixdorf in 1953, were programmable and/or had alphanumeric input/display
capabilities?
Regards,
James Redin
http://www.dotpoint.com/xnumber
Pictures are worth 1000 words - my earlier text post didn't elicit any
responses... maybe one of you can ID this board (or more particularly, the
type of system) from the pictures. Two pics available; large and small.
The connector shows the single "pin" on this side, and multiple separate
pins on
the reverse.
http://www.comcen.com.au/~adavie/weird/boardbig.jpg [250K]
http://www.comcen.com.au/~adavie/weird/boardsmall.jpg [95K]
Betcha can't!
A
Apologies for the earlier post with the incorrect URL - don't you wish,
sometimes, that you could send a chase-up email to kill your earlier one?!!
Someone was throwing away a box of five shrinkwrapped ones like this.
I grabbed one and opened it, the rest I gently obsucred but they
might be gone. As I understand, this is an emulator for a 3270
terminal. Is it of any use to me without a System/370? Also, there
was a box with four or five shrinkwrapped apckages of IBM DOS 3.30.
Assuming anything is still there, does anyone want any of this?
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Personally, I dislike PS/2s because they are almost impossible to
upgrade due to the weird specs. But, there was a time when I would do
almost anything for one. By the way, I found two weird systems at my
school. One is the "Writing System" which looks like a PS/2, and we
have a bunch of "Eduquest" systems, which are now all in the supply
room.
>they can serve as spares for the rest of my systems. That and I'm not
>really into collecting PCs.
>
>Allison
>
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
