Josh Dersch wrote:
On 10/12/2013 12:22 AM, Holm Tiffe wrote:
Josh Dersch wrote:
Thanks for the confirmations. The step-up from
110->220 should be pretty
easy to deal with, but I'm wondering how tolerant this supply would be of
60Hz A/C. I suppose if it's a direct clone of the Dec Pro's supply it
might be OK, I'll have to compare :).
- Josh
Better forget the Idea about a "direct clone".
The computers are looking like ther american originals but if you are
looking deeper, they don't have much in common.
Most of the software is compatible, ok.
Well, this particular machine certainly has a lot more in common than
the exterior appearance and software compatibility. I don't have my Pro
350 handy at the moment (it's in storage) but here's a link to a picture
of the disk controller from the Pro:
http://www.pdp11gy.com/PC350/DEC350_5.jpg
And here's a picture of the same board from the Elektronika:
http://yahozna.dyndns.org/scratch/elektronika/disk%20controller.jpg
Yes, in this case I think it is clear what happened, but look at this for
example:
http://www.tiffe.de/Robotron/PDP-VAX/E60/E60-01.jpg
http://www.tiffe.de/Robotron/PDP-VAX/E60/E60-02.jpg
This is the CPU of my E60, a LSI11/03 with 4KW of DRAM on it (2107 likes on
the TOP).
Look at the original DEC CPU, it looks totatally different.
The connectors are QBUS but Metric.
I'm sure there are some differences here, but even at a component layout
level they're very similar.
Yes.
That's my experience for years. Please don't think russians are idiots
that are only able to copy something.
I have never said such a thing.
There are performat PDP11 Processors
with no "Original" from DEC. They alo build an VAX Micro that was acting
like a VAX 750, something like this was never made by DEC.
Certainly. I have an Elektronika MK-85 (no direct relation to the
straight-85):
http://gregescov.tripod.com/calc.htm
Yes that thing is REALLY nice.
Which is by far the most interesting use of a PDP-11 CPU clone I can
think of, though the battery life suffers for it :). (And it's a
behavioral clone of the Casio PB-100 with some enhancements and
interesting bugs...)
I don't know why they copied the look of their boxes 1:1 but I'll bet you
will be not able to put a DEC card into the slots of that Machine, mostly
they copied the singals and ther order, but the pin distance is metric and
not imperial.
I'll have to check that, as I said, I don't have the 350 on hand. But I
don't doubt that you're right.
Boxes like the PSU will be totally different inside, but take a look into
the PSU, possibly you will find a Jumper oder soldering bridge that will
change the supply voltage to 110V.
About the 50 vs. 60Hz: that will be no problem but you will have for sure
Daytime Clock that will run away...
Thanks. I did a cursory inspection of it but I'll give it another go
over just in case.
- Josh
>
>Regards,
>
>Holm
I'll look if I can find the schematics of the PSU from your computer,
have to find out which Kind of CBK-Something it is.
I think this is a switchmode PSU possibly you can rewrire the input to use
something like a "Greinacher" voltage doubler to get it up with 110V.
Regards,
Holm
--
Technik Service u. Handel Tiffe,
www.tsht.de, Holm Tiffe,
Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583
www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741