As it seems important to verify the program after programming at different
voltages in the allowed range, does anybody know a production programmer
for the low voltage types, which ideally can be programmed as to which
voltages to use for under-/overvoltage verify (like down to 3V or even
less, for e.g. 16LF84 and other "L" devices)? Or which at least would use
something useful for the L devices?

Gerhard