Here are my thoughts on your need:
-----Original Message-----
From: jpero(a)pop.cgocable.net <jpero(a)pop.cgocable.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, May 21, 1999 9:51 PM
Subject: TCPIP via ethernet under DOS? (I know that is possible...but!)
>What s/w is needed to do the ip polling to gather in ip numbers on
>outset of connecting to cablemodem?
The s/w should consist of an interrupt driven device driver for the NIC,
with any interrupts providing for input servicing. Now, this device
driver should also provide the transfer of processor control to the IP
layer. So, my suggestion is that you start with the NIC software. Under
DOS you should also be able to implement the IP stack by extraction
>from LINIX, or some other UNIX variant. Sure, there is bound to be
a lot of modification work that you will have to supply to the code you
"steal" from LINIX but, since DOS is a pseudo-lookalike for UNIX, it
should work easily.
William R. Buckley
Whew. I'm done (for now) with my new Heathkit site, version 3.0!!!
http://millennial-concepts.com/dogas/heath.html
25 pictures and 7 documents in 9 pages and a few days. Please check it out
and let me know what you think or can add.
;)
- Mike: dogas(a)leading.net
Hi there, just thought I would pass this on. As of late last night, this
person still had no takers. He has for free - if you pick up - the following:
25+ Apple II+ or IIe CPUs, 2 green screens, 3 color monitors, at least 10
5.25 drives, a couple of 3.5 drives, many A2 I/O cards, 2 or 3 IIc CPUs,
monitors, and various accessories, a half-dozen Mac Plus/SE CPUs, 4 Mac II
CPUs, a Mac IIci CPU, a B&W Mac monitor, 6 various modems, 4 or 5 Imagewriter
printers, a couple of boxes of assorted cables, and several boxes of assorted
Apple II and early Mac software.
Location: Plainwell, MI 49080.
Write: leblasmith(a)aol.com
Best,
David Greelish
Classic Computing Press
www.classiccomputing.com
<Note: BTW, I found a reference in the N* newsletters I have to the A2
<16k ram board being susceptible to noise on the bus. The A3 board,
<which was available also as an upgrade to the A2, has alot better noise
<immunity.
That too! ;)
I found the NS* I have was real cranky with a compupro Ram16, so for an
experiment I pull the bus terminator from my CCS crate and all of a sudden
all the crankyness is gone. This is something I never saw in my other NS*
and the are identical save for mine was hand assembled by me and the one
I'm working on is definately factory assembled.
Allison
> The judges can deduct points for any part of the computer that is
> not original as built by the manufacturer, or as constructed at
> assembly time for kits. Replacement parts must be indicated to
> the judges by the competitor. New old stock parts will be
> considered to be replacement parts with a lesser point
> deduction. A reproduction can not receive full points in this
> category.
Interesting set of rules, with an interesting sense of "purity". In
the real world, of course, someone who bought an IMSAI and populated
it with only IMSAI peripherals was a fool. And it also leaves out
the richness of computing that is (was) possible - take a look in the
back of a late 70's BYTE and you'll see hundreds of manufacturers making
a huge variety of S-100 boards. Yet any computers demonstrating
this richness, so important in the early personal computing industry before
the dominance of the PC-clone and the subsequent dull monotony of
compatibles, lose points in this proposed judging scheme. Oh well,
different strokes for different folks.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
> Finally, it occured to me that I had flipped the chassis over to put
> some new rubber feet on the bottom and wondered if I could have shifted
> something, like a loose screw or nut. So I removed the motherboard and
> looked underneath. LO and BEHOLD! A previous owner had replaced an
> LS series chip and its socket and had not CUT OFF the excess leads on
> the bottom of the board!!! When I shifted the machine, it pushed the
> leads against the bottom of the chassis effectively grounding them!
>
> Once those were clipped and a piece of anti-static foam inserted beneath
> the motherboard, the machine now talks to the terminal FAR more reliably
> than before.
Um... I thought that anti-static foam was conductive? Wouldn't that
be bad? Maybe I'm wrong.
Bill Sudbrink
At 01:14 AM 5/22/99 -0700, Sam wrote,
> The judges can deduct points for any part of the computer that is
> not original as built by the manufacturer, or as constructed at
> assembly time for kits. Replacement parts must be indicated to
> the judges by the competitor. New old stock parts will be
> considered to be replacement parts with a lesser point
> deduction. A reproduction can not receive full points in this
> category. Any consumables do not have to be authentic. Any item
> that has questionable authenticity or originalty needs to have
> supporting documentation.
>
>
So I would be penalized for getting my SWTPC CT-1024 video terminal to work
and enter it? First I changed the number of characters/ line from 32 to 64.
Then I added a cassette "bit bopper" to it. I found the 60Hz line sync
didn't work right, so took it out. Lastly, I added some graphics display in
parallel to the characters. Now 20 or so years later, it doesn't seem to
work, and the "original" ic's are all soldered in.
-Dave
Seems to me like last time I took one of the classes leading to "ESD
Certification" the standard resistance for "primary packaging," which is
what encloses and otherwise directly contacts the packaged items, was 1
MegOhm per inch. That is high enough resistance that you can't hurt
yourself with inadvertent contact with the AC mains, yet low enough to
dissipate static from the usual sources with little risk to the components.
Dick
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Saturday, May 22, 1999 4:31 PM
Subject: Re: Northstar Horizon Update
>> > Um... I thought that anti-static foam was conductive? Wouldn't that
>> > be bad? Maybe I'm wrong.
>
>[...]
>
>> yeah, I thought anti-static foam was made from carbon specifically so it
would
>> conduct static charges away.
>
>I've just taken a piece of such foam and stuck my ohmmeter probes in it,
>about 0.1" apart. The resistance was about 5-10M. I don't think there's
>much chance of that shorting out a TTL signal.
>
>-tony
>
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Does anyone (Philip?) have any general information on the Tektronix 31
programmable calculator?
Sellam Alternate e-mail: dastar(a)siconic.com
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