I note that there are NC relays there but for some reason you can only connect the relay contacts to one thing, so I gave up.
(, Tue 23 Jun 2026, 22:52, Reply)
(, Wed 24 Jun 2026, 6:50, Reply)
Have got to ALUs so far. It's surprising how much of this I can remember from a degree course over 25 years ago...
(, Wed 24 Jun 2026, 21:40, Reply)