Hi,
I used to be a field service engineer for VDM in Europe. Did you get the
620L100 working?
Was the Tektronix a 611? If so it could have been an early nuclear
medicine system.
Regards,
Keith
--
Keith
I've got what I believe to be a drive with a Vxworks HRFS filesystem
on it. Anyone know of a quick way to verify this (by peering at the
raw data)? Are there any third-party utilities that might let me
mount this under Linux or (shudder) Windows?
TIA,
Chuck
If you follow the SIMH list at all, you may have heard that the
preliminary version of a VAXstation 2000 emulator has been released
upon the world. Judging from what I've heard on the VMS newsgroup, a
system like that really works best with an older (4.x-era) version of
VMS along with the VWS workstation software. I've been able to find
DECtape II images of an upgrade only version of VMS 4.7 for use with
an 11/750, but can't seem to find anything that has the whole hog?
Does anybody know of a place where TK50 images of VMS/MicroVMS 4.7 as
well as a few other basics like VWS and maybe Pascal or Fortran or
BASIC might be found? Ideally, I'd like to get the setup process
written up and a few screenshots made for the curious, so any help
that can get me started would be most apprectiated.
Mike
This is sort of addressed to Al but if anybody else has a scanned copy or
knows where to find one that would be great.
Al, do you have a copy of the Borland Turbo Assembler doc for v5? I check
bitsavers once in a while and have not found it. Do you have any Borland
doc you have not put up on the site and if so do you have a list and any
ETA?
Thank you.
--
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As an idea to get RT-11 onto your RL01; why not try using a TU58
emulator, with oversized tape images? There's a modified driver file
out there - very easy to find too - that'll let you have RT-11 think
the DECtape II tapes are the size of an RL02, which will let you boot
the RT-11 V5.3 installation pack on the emulator. From there, just
install RT-11 to the real RL01 as you would normally install RT-11.
It's simple to setup (and if you don't want to fiddle around with disk
images, asking will get you one from me or whoever else has done it
this way), and all you need on the PDP-11 side of things is a second
serial line. Also, it's relatively painless, as the RT-11 install
isn't all that difficult.
(Honestly, the entire installation of RT-11 via the emulated,
oversized, TU58 would be:
INITIALIZE/BACKBLOCK DL0:
COPY/SYSTEM SY:*.* DL0:*.*
COPY/BOOT:DL DL0:RT11SJ.SYS DL0:
BOOT DL0:
And that's it, you're in RT-11 SJ on your real RL01, SYSGEN it if you
wish to tailor your RT-11 install.)
Cheers.
So I finally got my hands on a pdp8/a at the University auction. It's the
omnibus model that's built into a desk and called the Classic, short for
CLASSroom Interactive Computer. I had no idea it was so heavy as it was
loaded for me into the back of my pickup. I discovered it must be real heavy
as the my F-150 groaned when loaded and when I came home and unloaded I
almost herniated myself. There it sits, almost complete (without the VT52)
but has an extra RL01/RL02 board. Is it the desk that gives it the weight. I
know the dual RX01 are heavy, but the are the cage, power supply and boards
real heavy in these things or is the DESK to blame. Until I put it on
something that I can move around, it will sit in my driveway. I can run a
terminal cable and an extension cord out to it to maybe boot it up after I
do some more research on it to see if all the boards are there.
One thing is not clear.n looking at the board numbers, it seems it doesn't
have a memory board, but it might have memory aboard the CPU card. Is this
right? It uses the newer cmos memory. It has the three board set that also
was used in the KIT-1, but it also has a variety of other boards that I'll
write down as soon as I can.
Cheers
Tom
> From:?h.j.stegeman at hccnet.nl
> Date:?Tue, 24 May 2011 17:08:31 +0200
>
> I am restoring an old IBM terminal with a ferro resonance transformer.
> I slowly increase the prim voltage with a variac.
> At the same time I measure the sec voltages.
> The normal voltage at the prim site is 240V
>
> At +/- 130V (prim) I have already normal voltage at the sec site.
> (+5V , -18V etc)
> The sec side is loaded and contains no regulators.
>
> Anyone any idea why at 130v everything is normal.
> I don't dear to go to 220V
>
> Thanks for all your replies.
>
> Henk--
I just repaired two DEC ferroresonant power supplies that are 115VAC
input. From 45VAC to 115VAC input the +10/-15VDC output is at the
normal voltage. What you are seeing is the ferroresonant circuit at
work.
Our power supplies lasted just a few hours before the AC capacitor
failed. I was able to find replacement "run" capacitors on eBay. You
can't use "start" capacitors because they are not designed for a 100%
duty cycle.
Michael Thompson
I was looking around for pictures of PDP11 front panels and stumbled
across this page. I think mass quantities of alcohol were involved.
Have your eyebleach at the ready.
http://www.schlabonski.de/zwiebeltuete.html
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
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