>
>I have the H-17. What is the H-37 as I don't recognize it by that number?
>I have other two cases, one with dual full height 5 1/4" drives and the
>other with dual 8" drives, but I don't know the model number at the moment.
The one with the 8" are the H27, I think...
- Mike: dogas(a)leading.net
While out junking at lunch I met a gent who said he has a Grid Laptop
with a metal case (he said this model went to the moon) and uses
bubble memory. He said he'd entertain selling it but I've no idea what
to offer. Any ideas on what to offer or any info on this laptop? I'd
appreciate and info.
Thanks,
Marty
marty(a)itgonline.com
Hi all,
I have seen several plastic DIP IC's from the 1970's have a white ink stamp
on them that
say something like "ETC 4" on them. (Your number may vary) Most are Intel
RAM's, but some are Signetics or National TTL. Before I have seen them on
chips on boards, but have now bought a bunch of IC's new in tubes which also
have this stamp.
Has anyone else seen this and know what it means?
-Dave
Hello, all:
Does anyone have a schematic for the Altair front panel? In my document
collection, I have the CPU, power supply, clock, and RAM schematics, but not
the FP schematic.
Thanks.
[ Rich Cini/WUGNET
[ ClubWin!/CW7
[ MCP Windows 95/Windows Networking
[ Collector of "classic" computers
[ http://highgate.comm.sfu.ca/~rcini/classiccmp/
[ http://highgate.comm.sfu.ca/~rcini/pdp11/
<================ reply separator =================>
On Jan 21, 16:58, Sam Ismail wrote:
> Subject: Re: Reiability of wrong media (was: is out of 5-1/4" diskettes
> On Fri, 22 Jan 1999, Pete Turnbull wrote:
>
> > "OK, so that's a flippy", I said to myself. A little later, I re-read
the
> > catalogue -- and got a different listing! I had inadvertantly
catalogued
> > side two, with the disk right-side-up -- and realised that the tracks
must
> > not line up, so side two had two sets of data, going in opposite
rotations,
> > with the tracks interleaved!
>
> This can't be possible! Otherwise, why didn't someone exploit this to
> make 4-sided diskettes??
It was an 80-track drive, but the disk was formatted to 40 tracks
originally -- there just happened to be two sets of 40 on one of the sides.
The second set was probably recorded on a double-stepped 80-track drive,
so the track width was only half as wide as a real 40-track would have
written, and becuse of the offset between upper and lower heads, just
happened to fall in the right place.
It would be an awfully complicated way to get 80 tracks out of an 80 track
drive :-)
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
At 02:41 PM 1/21/99 -0800, you wrote:
>> For $5 and shipping, I got (on eBay!) a Sharp PC-5000 laptop. No biggie
>Are you sure this isn't just a re-branded Gavilan? Sounds an awful lot
>alike.
Very sure. Though I suppose the Gavilan could have copied the Sharp's
design. 8^)
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
At 03:05 PM 1/21/99 -0500, you wrote:
>I might be willing to unload mine. When I hear one went for $400 on E-Bay.
I've not heard of a Zorba going for $400 on eBay. The only one I've ever
seen on there went for a little over $125. It was the weekend around
11/9/1997 and I was on a weekend get-away with my GF when it closed. I had
also blown a significant bit of cash on the weekend, so I couldn't just bid
higher.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
Hello, all:
Tonight, I finished posting the MOS Technologies Hardware Guide. It
appears to be a complete guide to designing and using MOS microprocessor and
peripheral products.
[ Rich Cini/WUGNET
[ ClubWin!/CW7
[ MCP Windows 95/Windows Networking
[ Collector of "classic" computers
[ http://highgate.comm.sfu.ca/~rcini/classiccmp/
[ http://highgate.comm.sfu.ca/~rcini/pdp11/
<================ reply separator =================>
Hello Hans,
you are certainly welcome to it - after all its only bits and not a single
atom,
so it can be copied easily. However, there is no documentation apart from
source code comments - it's a (hopefully) portable C program plus some
ASCII data files, so it should run on anything that has a C-compiler.
Since your address makes me believe that you are affiliated with Siemens
Munich,
and since I live in Munich too, maybe we just get together and discuss this ?
I will send you my coordinates in private email.
The simulator maps core and drum to RAM arrays, papertape input and output
to File I/O, and the console to keyboard/screen. It would be neat to interface
to
a real S2002 console - there are at least two in Munich, one at the Siemens
museum and one at the Deutsche Museum; maybe that would be a fun project
to try one of these to agree to that proposal ?????
The compiler I have is in fact the Alcor Triplex Main S2002, the result of a
thesis
(not mine) done at Mainz University in 1968, extending Algol by the data type
TRIPLEX which is an interval representation of a floating-point number:
[lower-bound, standard-f.p., upper-bound]
Any operation on triplex numbers will produce the min/max values resulting
>from possible roundoff, so that the error propagation of roundoff may be
studied. This is theoretically nice, but in practice you can invert a 10x10
matrix only if you are lucky and it is conditioned extremely well, otherwise
some pivot interval will include 0 resulting in a divide error. In those days
there were fears that one could not do any calculation involving millions
of f.p. operations because of roundoff - that turned out to be really
academic.
John G. Zabolitzky