I don't think it was illegal to assemble computers at that time there. I did something like this in USSR at that time and don't think that it was too different

I don't think it was illegal to assemble computers at that time there. I did something like this in USSR at that time and don't think that it was too different in Romania. And actually from the same parts - I see couple of chips there marked "сделано в СССР" (made in USSR). USSR produced clone of i8080. Z80 clones were produced GDR (East Germany) and USSR too. The only problem was to buy those chips. You could buy them only on black market realistically speaking. Only that was kind of illegal. Interesting that schematics of such hobby computers was published in state magazine "Radio", like this one: https://en.wikipedia.org/wiki/Radio-86RK https://en.wikipedia.org/wiki/Radio-86RK