<1) There are lots of resources out there featuring VAX information; you mig
<look at the NetBSD/vax port website (http://www.netbsd.org/Ports), the VAXa
<(http://vaxarchive.org), and Hamster's Digital Resources site, which can be
<http://www.telnet.hu/hamster/dr.
Yes many of them are excellent!
<2) I don't believe there is any sort of hobbyist distribution of Ultrix, ho
Ultrix was never released and I suspect never will. My guess is it has a
lot of the ATT/BSD code that was encumbered.
<3) All microVAX systems use some variety of serial terminal for a system co
<(although I believe it has to be VT100 compatible, so I'm not sure how usef
<ADM terminal will be). VAXstation systems are the ones that use monitors a
<consoles, however it is possible to get them to run over a serial console a
<using a few different methods depending on which model you have.
For those that don't have a video console the terminal only has to be
serial 9600/8/n/1 and supports Xon/Xoff meaning most anything works though
some aren't pretty. The terminal can be hard copy such as the LA100KSR.
Allison
I wrote:
> > sites for the small computers I collect. Unfortunately there are groups
in
> > the US which oppose this activity -- not because any of the program
> authors
> > are objecting at this late date -- but because these groups propose that
> > *any* form of emulation, or use of *alien* hardware, to run, store, or
> > transfer these programs is illegal and should be stopped.
Derek Peschel inquired:
> That's a broad claim. Do you have any details about who those groups are?
Yes. Some retrogamers I know have a group called CLEAR, which favors
emulation. You can find them at:
http://dialspace.dial.pipex.com/town/estate/dh69/clear/
For a look at the IDSA -- who oppose emulation -- check out:
http://www.idsa.com/piracy.html
Glen Goodwin
0/0
Dear list members:
I know you are going to hate me for this but circumstances force me to
maximize my income.
I have listed my last Processor Technologies Saul 20 on ebay. I know many of
you were interested. I have also listed a Morrow Micro Decision and a Quantum
2080 8 inch MFM hard drive that can be used with many older systems.
My last Quantum sold for $20. Not everything goes for big bucks.
My ebay name is innfosale. Please note the two Ns in the name.
This URL should bring up my list:
http://cgi3.ebay.com/aw-cgi/eBayISAPI.dll?MfcISAPICommand=ViewListedItems&u…
id=innfosale&include=0&since=-1&sort=2&rows=25
For those that are interested, you might bookmark the list. I will be selling
more classic computers, S100 and DEC cards, drives, HP, in the future. If you
notice I rarely use reserve bids, preferring to let the market set the price.
I am good at finding equipment.
Many thanks to all for the stories and help on the list. I love reading it
even when I've been gone two weeks and come back to 1000 messages.
Paxton
IT IS ALIVE!!!!
I confess, I cheated, BUT MY PDP-8/M LIVES!!!! AND it has 8K of Core!
On the down side I now have two 4K core stacks that need repaired.
It's so cool, I now have it running the initial operating checks on pg. 2-7
of the Processor Maintenance Manual. Blinken lights are so cool!
IT IS ALIVE!!!!
Now excuse me while I go find some rope to tie myself to my chair so I'll
quit bouncing!
IT IS ALIVE!!!!
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh(a)aracnet.com (primary) | Linux Enthusiast |
| healyzh(a)holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
I don't like tubes. My experience with tubes is *very limited*. I have had a
few crash courses over the past few years......
Okay, I bought the Tek RM503 for my PDP-8/S. When I turned it on I heard
some terrible noises and found the power supply voltages were all over the
place (way off , like 10V was 500 etc..).
This scope uses a primary transformer to supply the 6.3V to most of the
tubes and has a separate winding for 6.3V for the CRT heater. Off this
transformer another winding fed to a voltage doubler and then to an
oscillator with another transformer to create a wide range of voltages. (12V
to -3000).
Picture this... the -3000 volts is fed right into the CRT heater (which
happens to be directly coupled with the primary transformer). I have been
able to locate the problem somewhat. If I remove the -3000 volt line between
the HV rectifier tube and the CRT itself then the scope works fine! All
waveforms are proper and the power supply works great (no picture of
course).
It can be a few things... I am hoping someone here who use to work on tube
units might be able to tell me which problem below it most likely is:
#1) A bad HV rectifier tube causing the HV to come back to the second
transformer which would put a few thousand volts back into the secondary
winding taps causing high voltage everywhere.
#2) Bad insulation on the primary transformer secondary "crt heater" winding
which jumps over to the other winding that happens to be the main
powersupply winding (125V X 2)
#3) The -3000 volt wire is closely tied to the other low voltage wires. Is
insulation breakdown possible due to a crack?
My next step will be to take a reading on the primary transformer (first
transformer, secondary winding [doubled winding]) and see if thousands of
volts are there... That might help determine if there is an insulation
breakdown but from what I can tell when the -3000V is hooked up every
voltage goes crazy.
I am going to bed.. Hopefully I wake up to a great answer ;-)
john
PDP-8 and other rare mini computers
http://www.pdp8.com
Q1: Can anyone tell me the two tone that make up dial tone?
Q2: What's the ring voltage (p-p) and frequency? 90Vpp? 10cyc?
Q3: What's the off hook and on hook line Voltage? 9VDC and 45VDC?
----------------------------------------
Tired of Micro$oft???
Move up to a REAL OS...
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##/____/ /_/ /_/ /_/ /_____/ /_/|_|####
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("LINUX" for those of you
without fixed-width fonts)
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Be a Slacker! http://www.slackware.com
Slackware Mailing List:
http://www.digitalslackers.net/linux/list.html
Please reply directly to <sellam(a)siconic.com>.
Hello.
I'm trying to fix an Atari 130XE that has a memory problem. It
automatically boots into the self test and shows bad RAM after block 17
(ie. blocks 1-17 are indicated to be good by the self test).
Is there a web site somewhere that has a repair FAQ available for the
Atari XE series?
Please reply directly to <sellam(a)siconic.com> if you can help. Thanks!
Sellam International Man of Intrigue and Danger
-------------------------------------------------------------------------------
Looking for a six in a pile of nines...
VCF East? VCF Europe!? YOU BETCHA!!
Stay tuned for more information
or contact me to find out how you can participate
http://www.vintage.org
Well, to respond to a few of those VAX-related questions as best I can... :)
1) There are lots of resources out there featuring VAX information; you might want to
look at the NetBSD/vax port website (http://www.netbsd.org/Ports), the VAXarchive
(http://vaxarchive.org), and Hamster's Digital Resources site, which can be found at
http://www.telnet.hu/hamster/dr.
2) I don't believe there is any sort of hobbyist distribution of Ultrix, however you
can run the hobbyist distribution of OpenVMS (http://www.montagar.com/hobbyist), or
if you're interested in a UNIX, NetBSD is available for a number of VAXen.
3) All microVAX systems use some variety of serial terminal for a system console
(although I believe it has to be VT100 compatible, so I'm not sure how useful that
ADM terminal will be). VAXstation systems are the ones that use monitors as
consoles, however it is possible to get them to run over a serial console as well
using a few different methods depending on which model you have.
Hope this is helpful :)
-Sean Caron (root(a)diablonet.net)
Decided to make a thrift run today and in addition to getting an IBM L40SX
last week, got this stuff today:
complete amstrad pc6400hd even got the owners manual. good shape too
C128 in box plus 1024 monitor and the 1530 tape unit in box as well as a 1571
drive in box and about 400 disks of software as well as all cables.
an atari 400 box filled with about 350 never used 5.25 floppies.
total price not including the L40 was $7.
whilst rooting around in the junk for sale, i met a guy who was a
(presumably) IBM CE back in the old days and spoke of servicing plugboards
and paper tape and such. he also worked on IBM selectrics. from what he was
saying, he has some old Freiden calculators or some sort. he didnt know much
of current pc stuff, but told some fascinating stories of the old technology
in the short time we spoke.
DB Young coming in 2000: www.nothingtodo.org !
--> this message printed on recycled disk space
view the computers of yesteryear at
http://members.aol.com/suprdave/classiccmp/museum.htm
(now accepting donations!)
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
>I believe it might me a development system for the 8008 or the 8080
>(Intallec 8i IIRC).
I think so too. The Intellec 4 is featured in the back of the MCS-4 4004
manual and states that it is "ideal for prototyping MCS 4 Systems". The
MCS-8 manual dosent however mention the Intellec 8.
- Mike: dogas(a)leading.net
