I can't believe I just touched my nose to every key on a public library computer 😡 If I catch something you are responsible! (I'm now licking the mouse in case that is the antidote.)
PBG4 built-in: all keys work. With my old eMac keyboard:
ABCDFGHJKLMNSVXZ
Missing: E I OPQR TU W Y
Also, every non-alpha key works, except:
{ does not
And on the numpad: 456+ don't work. (The others do, but Shift of course changes nothing.)
Interesting. I remember the old "parallelogram problem" on Amiga, where it could register any 4 keys at once, UNLESS they were in parallelogram formation, in which case one would be missing.