AW: DEBYUT-M
Thank you solwac, a good clue! KR1810GF84 nearby cpu and quartz is a clone of Intel 8284 and contains the clock generator. Datasheet tells us that clock is one third (!) of crystal frequency?! That means, clock is 2 MHz only...
Accessing ROM... one of the eproms on leningrad website show access time of 200 ns, very slow... Pictures in our wiki show russian eproms, I can not identify speed rating.
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