25 Jul
2025
25 Jul
'25
2:47 p.m.
cz via cctalk wrote:
Oh is this public now? I remember this, it was
hilarious. Imagine what
happens when all your valves go to "open" or "closed" at once.
I wonder if this led to the downfall of the Soviet Union. Just think about
how you would feel if you suddenly realized that all the infrastructure
based on chips and designs that you stole was now 100% suspect and could
blow up at any time.
VAX, PDP11, etc.... And remember when the Pentium "bug" came out? Wasn't
that just weird....
Ah fun stuff no doubt.
For most ppl here it seems impossible to realize that nothing of this
stuff could bei "copied" w/o to understand what's going on on the chip
and modify the layous etc. to fit the local foundry technology.
For Example.. there is the J11 ..this is a two chip IC, the Russians
have made an K1801VM1, VM2 and VM3 ..all single chip designs.
They made the N1806VM2 ..an CMOS chip, the K1801VM2 is the NMOS
Eqiuvalent.
The first "cloned" VAX was an chip that was an 11/730 in original..a
bunch of pcbs. They cloned a chip, that never existed. They build their
own hardware regarding the processor manual.
Yes, there are clones of the J11, DECs fastest PDP11..but this chip made
by Harris wasn't truly a success..it never reached the clock rates they
have planned. but russians build thier own chips also, this for example:
https://www.rouming.cz/roumingShow.php?file=elektronika-mk-90.jpg
I've worked some time on a east german VAX11/780: Robotron RVS K1840,
An real clone, besides of the fact that it had an K1620 MOS Bit Slice
PDP11 made in the GDR in it as console computer and there where 2 5,25"
Floppies instead of an 8"...
And the MVAXII was cloned in the GDR and in the Soviet Union
independently. After the fall of the iron curtain DEC employed all the
People working in Dresden at Robotron that build the VAX clones.
So Please: Don't think Russians are evil, nor they are stupid. Think
more about US Delta rockets using RD180 Engines from Rossia since
the USA couldn't build such efficient Engines itself..
https://www.youtube.com/watch?v=TMbl_ofF3AM
And next..there is not only an CIA and an NSA ..there are other
"intelligence" services on the world and they doing ther job..
russian PDP11:
https://www.tiffe.de/images/oleg/
.. the PCBs and it's connectors are all metric..
Russians built home computers with ther PDP11 CPUs (K1801VM1)
https://www.tiffe.de/Robotron/PDP-VAX/BK/
Schematics of the K1801VM2 CPU (big!)
https://www.tiffe.de/Robotron/PDP-VAX/russisch/K1801VM2/
Nice Jet on this:
https://www.tiffe.de/Robotron/PDP-VAX/russisch/K1801VM2/p010.jpg
That's the K1801VM3 chip, with integrated MMU:
https://www.tiffe.de/images/K1801BM3.jpg
VM3's on the left, H1806VM2 on the right, K1801VM2 at bottom:
https://www.tiffe.de/images/K1801-1.jpg
...which one is a "clone"??
Some sort of an LSI11: (M2 CPU)
https://www.tiffe.de/Robotron/PDP-VAX/E60/CPU-oben.jpg
Magnet Tape Controller from that thing above:
https://www.tiffe.de/Robotron/PDP-VAX/E60/I17.jpg
Yes, that are russian AM2901s..
Thats an Elektronika DBK, with the M2 CPU from above:
https://www.tiffe.de/Robotron/PDP-VAX/E60/DSCF0065.JPG
That's DEC..simply nice to look at:
https://www.tiffe.de/Robotron/PDP-VAX/Kernspeicher/
Regards,
Holm
..and no, I'n not a russian, but I have russian and ukrainian Friends.
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