It works fine on the previous version too, just that the implementation to update the display was a bit awkward.
You can still copy the reverse input_r, makes it easier for the plugin too with the keys at the same place as im01.

Unemulated Soviet/Russian chesscomputers:
- Debut (older version of Debut-M?)
- a clone of Mattel Computer Chess, I assume identical ROM: http://chesscomputeruk.com/html/elektronika_im-29.html

I think there are some other clones, Mephisto Frans Morsch chip in one of them for example: https://commons.wikimedia.org/wiki/F...on_the_ICs.jpg