wanted - ZS Scorpion 256/1024 Turbo PCB

[Shockwav3]

Hey there,
where would be the best place to find such a PCB? As of now a Scorpion is the only "main" clone I'm still missing.
Is this board still available for sale anywhere? https://c.radikal.ru/c03/1806/2d/09d17c8f5114.jpg

[Advertiser]

[krotan]

Is this board still available for sale anywhere? https://c.radikal.ru/c03/1806/2d/09d17c8f5114.jpg

This board is made by Pavel Ryabtsov. https://vk.com/id18110958
There was a one-time release of it.
It contains many errors and is not recommended to be repeated.
Because errors are not eliminated until now.

[Shockwav3]

Ah, he sells under the name "pcbsale-ru" on eBay, doesn't he? I got my Pentagon48 board from him ... had a few errors as well, but it's working nicely nowadays after fixing it.
Which version would be recommended these days?

[krotan]

Ah, he sells under the name "pcbsale-ru" on eBay, doesn't he?

I think it's not him, and reseller.
I recently produced a small batch of PCBs that are a copy of the original Scorpion ZS 256 turbo (green scorpion). But they are over. There were a few small mistakes. This summer I plan to release another small batch of such bug fixes. Did you know that to build this board you need to have several deficient components?

[Shockwav3]

What do you mean by "deficient components"? If you mean domestic, russian parts like the VG93 and KT361/KT315 I have a stock of those.
Will your version use GAL chips instead of PROMs?

[krotan]

What do you mean by "deficient components"?

K565RT11 (or GAL instead of it), ep220pc (or GAL instead of it), soviet edge connectors (can be replaced by SL-62), K561LN1...

Will your version use GAL chips instead of PROMs?

This is possible to the same extent as with the original Scorpion PCB.

scorpion built by tigr101274 using my PCB

[свернуть]

[Shockwav3]

Board looks great
But yeah, I should have all those parts. There are also 60 pin edge connectors available on eBay and a friend of mine has a few for spares.
K561LN1 I had some issues with on my Pentagon48, but it turned out that they can be replaced with 74HC04 and work as intended (I should also have some K561LN1 just in case).

[krotan]

But yeah, I should have all those parts.

Thank you. The problem is that modern edge connectors have a pitch of 2.54 mm and Soviet ones are 2.5 mm.
In case I will supply the PCB, I can attach some rare components. In another case, I can put a plate assembly or the computer assembly.

[Shockwav3]

Ah yeah, that slot measurement could actually be an issue (I've previously noticed that those would still fit when you use some light force), since the pitch would also apply to the cards being used (I do intend to use a SMUC + GS on a Scorpion).
Personally I don't mind assembling computers myself, but i'll double check in case there are any ICs which are hard to get (1533 are virtually impossible to get here and the 74ALS counterparts are sometimes quite expensive) - thanks for the offer
Any timeplan yet, when you'll have the PCBs ready?

[krotan]

OK

Any timeplan yet, when you'll have the PCBs ready?

Now I have to do some work on fixing the board drawings. Then order the manufacture of PCBs. Then check. I think all this will take two months.
In addition, I have a SMUC and a PS/2-keyboard controller in my work.