[VladRussian2]

nostalgia :) The simple logical simplicity of this

http://pastraiser.com/cpu/i8080/i8080_opcodes.html

allowed, after some short time without even looking at the table, to type the binary code directly in (our preferred way of the Forth words implementation back then, on Russian 8080 clone of course :).

[tluyben2]

When I got my MSX from the attic after almost 30 years I still remembered almost all the opcodes. Took me few days to relearn the rest; I was 8 when I memorised them...