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The Soviet 1801VM2 LSI-11 Processor (2021)

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Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#41

Post by ruslan »

orbital-decay wrote: post #28
ruslan wrote: post #12

Arh.. nostalgia. I learnt to programme in PDP-11 assembly on ДВК-1 and БК-0010 somewhere in 89-90. That was my second assembly though. The first one was MOS 6502 on Atari 800s, they were quite popular in USSR in late 80th.Funny thing is that you still can purchase КМ1801ВМ3 chips in Russia for less than a $1 in bulk. I once considered building a ДВК clone to play with and to teach my kids some proper assembly, but th…

> I once considered building a ДВК clone to play with and to teach my kids some proper assembly I actually built a custom board with a K1801VM1 a while back to teach my son programming basics from the ground up. It's slow as molasses, but great at this purpose. The PDP-11 ISA is simple and comprehensible, as well as the 1801 microarchitecture. Underclocking and a few LEDs in the key points of the board can easily ill…

This sounds interesting. Are your schematics available ?

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#42

Post by kragen »

ogurechny wrote: post #39
mrweasel wrote: post #32

Earlier quoted context omitted.

The Elbrus 2000 is rather fascinating, but they can't even make them anymore. Perhaps the older models, but the newer ones where all manufactured by TSMC, and Russia doesn't have the ability to create anything below 90nm. There was an article about some Russian bank testing out the e2k, but they reported that the Elbrus-8C, was not acceptable. The 8C is 28nm, so made by TSMC, so even if it could perform it would be a…

Sberbank testing seems to be blown out of proportion by Wikipedia-studying analysts. Or someone else, for some other reason. It's easy to guess that certain “patriotic” circles had decided to make Sberbank support the production by signing some big long term contract, and they decided to NOPE out of it, and quickly made a critical assessment in comparison with top of the line commercial offers. Effective performance…

thanks for all this great information!

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#43

Post by kjs3 »

jhallenworld wrote: post #25
dmitrygr wrote: post #23

Earlier quoted context omitted.

https://gid.pdp-11.ru/a/mpss/mpss86-04.html https://gid.pdp-11.ru/a/mpss/mpss84-04.html

I don't understand the reset sequence of the KM1801VM1 and VM2, but it's clear for the VM3 (it starts at 0173000 or 026 depending on WO pin). It looks like it has status signals so that program and data memory spaces can be split, the English translation has this funny comment: "When working with weapons of mass destruction, system memory is “hidden”, i.e. its addresses in program mode do not occupy RAM address space…

Many PDP-11s had "split I&D" (Instruction & Data) capability built into the MMU so you could address 128k memory instead of only 64k. See: https://gunkies.org/wiki/PDP-11_Memory_Management

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#44

Post by kjs3 »

kragen wrote: post #35
mrweasel wrote: post #32

Earlier quoted context omitted.

The Elbrus 2000 is rather fascinating, but they can't even make them anymore. Perhaps the older models, but the newer ones where all manufactured by TSMC, and Russia doesn't have the ability to create anything below 90nm. There was an article about some Russian bank testing out the e2k, but they reported that the Elbrus-8C, was not acceptable. The 8C is 28nm, so made by TSMC, so even if it could perform it would be a…

the slow death of elbrus is a very sad story, similar to the usa's efforts to revive its interplanetary space travel program

Or Russia's efforts to revive it's expansionist military. Yes, very sad indeed.

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#45

Post by dekhn »

cyberax wrote: post #15
ggm wrote: post #13

Earlier quoted context omitted.

Systime, a UK based DEC var and terminal maker was busted copying VAX boards to on-sell to the SU when DEC couldn't under ITAR restrictions. They sold clones with DEC boards and decided to up the profit by cloning the DEC boards. Systime was doing fine selling VT100 compatible terminals but went seeking bigger bucks. I think the VAX was a sweetspot for them while it lasted. They went bust in the end. Their headquarte…

It interesting, because VAX had never been used much in the USSR. The main architectures were PDP-derived or IBM-derived.

well, except one of the most famous vaxen of all time, kremvax

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#46

Post by cyberax »

petrohi wrote: post #24
cyberax wrote: post #15

Earlier quoted context omitted.

It interesting, because VAX had never been used much in the USSR. The main architectures were PDP-derived or IBM-derived.

I remember using Soviet-made VAX clone from СМ ЭВМ series: https://en.m.wikipedia.org/wiki/SM_EVM

Your list misses SM-1700 ("СМ-1700"), a full clone of VAX-11/730. But all the VAX-compatible computers were produced only during the last several years of the USSR, so just a few thousand had been built in total.

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#47

Post by kragen »

kjs3 wrote: post #44
kragen wrote: post #35

Earlier quoted context omitted.

the slow death of elbrus is a very sad story, similar to the usa's efforts to revive its interplanetary space travel program

Or Russia's efforts to revive it's expansionist military. Yes, very sad indeed.

the only way this makes sense is if you hate both elbrus and the us space program, since someone who wasn't being sarcastic about russia's military wouldn't term it 'expansionist'

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#48

Post by kjs3 »

kragen wrote: post #47
kjs3 wrote: post #44

Earlier quoted context omitted.

Or Russia's efforts to revive it's expansionist military. Yes, very sad indeed.

the only way this makes sense is if you hate both elbrus and the us space program, since someone who wasn't being sarcastic about russia's military wouldn't term it 'expansionist'

Keep trying.

Re: The Soviet 1801VM2 LSI-11 Processor (2021)

#49

Post by kragen »

kjs3 wrote: post #48
kragen wrote: post #47

Earlier quoted context omitted.

the only way this makes sense is if you hate both elbrus and the us space program, since someone who wasn't being sarcastic about russia's military wouldn't term it 'expansionist'

Keep trying.

you're just posting hate in order to troll
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