It's working in dvk_ksm and dvk_kcgd -- it wants 4960 baud clock, not 4800. EDIT: Actually, 4960*64, not 4960*16 ...and it's working for me (this is lynx showing https://koi8.pp.ru):
The "keyboard port error 7" goes away if I replace ms7004 with lk201, and then this logo shows up:
It's supposed to look like this:
Not sure yet if emulation of ms7004 is inaccurate, or there was a different firmware for it.