Arh.. nostalgia. I learnt to programme in PDP-11 assembly on ДВК-1 and БК-0010 somewhere in 89-90. That was my second assembly though. The first one was MOS 6502 on Atari 800s, they were quite popular in USSR in late 80th.Funny thing is that you still can purchase КМ1801ВМ3 chips in Russia for less than a $1 in bulk. I once considered building a ДВК clone to play with and to teach my kids some proper assembly, but then found this DVK-FPGA project on Github: https://github.com/forth32/dvk-fpga