[jsn]

Huh, what a blast from the past. About 30 years ago, in Russia, I hacked up cyrillics keyboard support for Coherent by extending the line discipline layer in its kernel. It was probably still Coherent 3.0 though (which IIRC was based on Unix V6?), and the one on github seems to be 4.2.x.

[nigel_bree]

It's not based on V6, although it was basically created as a clone of it (and on the PDP-11, no less - the x86 versions of Coherent until 4.x were basically just minimal ports that kept the PDP-11's classic 16-bit flavour). It was a very very good clone, enough that a lawsuit was threatened and Dennis Ritchie himself got pulled into checking that it wasn't derived from any UNIX source - see dmr's comment at https://groups.google.com/g/alt.folklore.computers/c/_ZaYeY4...

[mike_ivanov]

Cool! I had my hands on it, too. For some reason it got traction in late USSR.