it was probably region-specific, haven't seen BKs here at home use.
people mostly had ZX clones, some Vector 06C (btw, ~1/3 of it's current MAME softlist made by my old RL friends), a bit of Lviv PK-01, and very few MSX clones.

Last edited by MetalliC; 09/10/16 03:23 PM.