> From: Mattis Lind
> Thanks Noel for sorting this out.
Eh, de nada. But thank you.
>> I wonder if the ucode in the two versions is identical? The uROM chip
>> numbers should give it, (if they are the same on both versions, albeit
>> in different locations on the board), but I have yet to check. Does
>> anyone happen to know?
OK, so the situation here is pretty complicated. To start with / make things
worse, that CPU uses lots of PROMs. Lots and lots and lots and lots of PROMs.
For the data paths board (M7260), both major versions appear to contain the
same PROMs (going by the DEC part numbers), but the chip location (Exx)
numbers are all different.
For the control board (M7261), the C, E ('early' version) and F ('late'
version) etch revisions each contain mostly the same PROMs, but apparently
with slight differences between the sets of PROMs in each (as reflected in
different DEC part numbers). For details see:
to which I have just added all the gory details.
As to getting the contents of all of them dumped in machine-readable form -
>> on the earlier version (prints for that version are in the GT40 prints
It turns out that I have hard-copy prints for the "C" etch revision of the
M7261, which do not yet appear to be online; the GT40 prints have the "E"
I will scan the pages for that revision of the board, and put them up 'soon'.
(I'm not doing the whole print set, it's about 1" thick, and most of them are
for other things anyway, like MM11-L memory, etc.)
The famous Brigham Young University 3D graphics program, by Dr. Hank Christensen.
I am looking for the fortran source, it should be 7 files:
Any docs related too.
Thanks for letting me beg.
Hi all --
I picked this DPS-6 up over the summer and it's just taking up space
(quite a bit of space) in the corner of my basement. This is a custom
16-bit, bitsliced, microcoded CPU from the early 80s with (I believe)
8mb of memory, and ethernet. It would originally have run a version of
GCOS. It's about the size of a large-ish minifridge, but a bit deeper.
It's also quite heavy!
It's a neat machine, but it's very obscure and unfortunately incomplete
(it is missing both mass storage and storage controllers). Otherwise,
it is complete and in good condition (albeit a bit dirty). So you can
see why you'd really want to have it in your collection .
If anyone's up for a project, drop me a line. Local pick up in Seattle, WA.
This is listed under the informative title "vintage computer":
which leads me to post it here under a more informative title, hoping that
someone here has a soft spot for Primes!
Mainframes and other stuff
Recycle center in NC is willing to save out "stuff" for people.
No, no one can go in the back and scrounge.
No, he does not want a lot of emails from people.
Yes, he gets big blue and orange and beige 6 foot tall OLD mainframes in all
the time. They squash them at the moment.
Yes, he will package small orders, and will properly palletize larger
Local pick up will be available after the new year.
So, if u can send me a picture with description and some part numbers, along
with what you want to pay, I will consolidate things and make arrangements.
Please don't ask for specific boards from DEC; they don't want to go into
that much detail.
QBUS will mean nothing to him.
Big orange cabinet that says xxxxx is much more likely to get saved.
They are moving to new warehouse 1st of the month, so all this will start
happening after the 1st of the year.
1613 Water Street
Kerrville, TX 78028
sales at elecplus.com
AOL IM elcpls
About six months ago I struck a deal with a place down in California for
four Documation M1000's that I've been able to tell so far they all work but
I really don't have space for more than one. I've been trying to sell them
at a loss for months now over on the Vintage Computer Forums and Nekochan
(if you got here you'll find pictures) but no bites. I swear there were
people out there that were looking. Where did you folks go? Might anyone
here be interested? I absolutely refuse to put them on the curb.
I have a VAX730 with both TU58 drives destroyed (capstan melted, need
I also have a bunch of cassettes, but unfortunately all seem to have
problems with the bend and/or bad spots on the tape.
Possibly I would try to replace the broken bands (if I find a source)
and/or replace the magnetic tape when damaged (I was thinking to try
with audio cassette tape, don' t know if metal oxide high density tape
could be good for it).
Anybody has some information about the coercivity of original DEC TU58 tape?
One problem indeed is the need of reformatting the tape, but: if I can
emulate the TU58 drive using a serial, would it be possible to send
raw commands to the drive using the serial and a PC?
PS-If possible, some good-condition cassette would be very useful to
me too. I'm located in Italy.
> From: Eric Smith
> which would respond to ARP requests for non-local addresses and reply
> with the router's MAC address (on that interface), specifically in
> order to make classful-only hosts work on a CIDR network.
Yeah, Proxy ARP (an early RFC here:
but IIRC it was people at CMU who first came up with the idea; this RFC is
>from people at UT-Austin, documenting it) was originally done to support
for more) when it was first introduced - for hosts for which people didn't
have the source, but needed to attach it to a subnetted network.
Subnetting was a stage before CIDR (which took subnetting and Carl-Herbert
Rokitansky's 'supernetting' and mushed them together).
On 10/4/2017 3:33 PM, Dominique Carlier via cctech wrote:
> Hi all
> I start here another topic concerning my research about a new Operating
> System for my freshly restored DCC-116 E.
> I originally intended to install RDOS on my machine but it seems very
> difficult to find the files needed to make a system installation tape.
FIRST: If you have drawings for the DCC, please let me know. I have
two of them (long in storage in the house, but they ran when I pulled
them from their Unitote/Regitel rack a couple of *decades* ago.
There is an RDOS - disk images, available at:
(Top entry in the list) It is about a 2.5MB disk image.
I suggest that you might download SimH and that image, configure SimH as
a straight Nova (rather than a /3 or /4) and see if it runs that image
OK. If so, there you go!
Beyond that, I *might* be able to help, but it will depend on what the
status of copyright is on what I have, and whether your system can even
run what I do have. I am looking into the copyright part of it - that
may take a week or two. (This is something I needed to to anyway).
In the meantime:
Do you have a way to *write* a tape image? I have an AWS format image
of an RDOS starter system. Note, however, that the label on the RDOS
starter image I have suggests it may only be appropriate for a NOVA 3
or NOVA 4, so it might not run on your system. So, I'd have to take
some time to boot it and try and set up a system for a straight Nova.
As this would take several hours, I'm not keen on doing that unless you
know that one from SimH will not work for you.
I also have some OS and compiler DG floppy images, if you have a
DG-compatible floppy setup. Several different operating systems there.
Same issue: one would have to see how many are compatible with a
straight Nova. I have images of the floppies.
Diagnostics for DG systems are notoriously difficult to find. I have a
few, in listing format.