What old software is used?

[001]

What software is used to draw this 'pixelised' schematic? Is it vintage (1990th probably)?

[ataradov]

Ha. I played with a program that did something like that on BK-0010. It had no notion of electrical connection, you just place things graphically and that's it. It was more than 20 years ago, so I don't remember the name, obviously.

[Ian.M]

Its almost certainly created post 1996.  This is indicated by the use of the high and low directional curly double quotes below the connector legend 'X1'[.

Any schematic capture package will pixelize if its coopy/pasted from a screenshot or rendered to a bitmapped graphics format.

The most distinctive thing about that schematic is the LED symbols.

[ataradov]

This is indicated by the use of the high and low directional curly double quotes below the connector legend 'X1'[.

I don't follow. Quote marks like this are a requirement of Soviet standards (GOST), so software supported them.

[001]

Thanx for all
This is ORCAD for DOS, v3.11 mid 1990th

marks like this are a requirement of Soviet standards (GOST), so software supported them

No anyway. Soviet and nowday Russian schematics looks like:

[ataradov]

This schematic has no labeled connectors. Here are a few samples from the same BK-0010 schematics with labeled connectors. This schematic was drawn in 1989.

[free_electron]

What software is used to draw this 'pixelised' schematic? Is it vintage (1990th probably)?

OrCad SDT under DOS. this pixelised effect is due to the libraries not being vector but raster based. a symbol was made from * and . and then 'compiled' into a symbol.

example :

....*******......
P**..........*.....
....*.........***p
P**..........*.....
....*******......

[ataradov]

OrCad SDT under DOS.

Support for Cyrillic letters threw me off.  P-CAD 4.5 from the same era had major problems with Russian language.