Finally I completely built and tested NEDONAND-16 board that is MPROM (Manually Programmable Read Only Memory ;)

It's programmable by inserting diodes into holes in proper places:

In order to do that diode's terminals must be specifically formed:

I connected it to my Analog Discovery 2 and tested its limits in terms of frequency:

So this is 100 kHz:

And this is 1 MHz - should be good enough for TTL:

P.S. But I redo this board anyway, because couple wires still may short on some copies of the board...