HP 42s annunciators

[Thomas Okken]

I don't have the HP-42S manual handy right now, but I remember that somewhere it (*) states that when you have a multi-row programmable menu, that is, one where you use KEY 7/8 GTO/XEQ to program the ▲ or ▼ keys, the ▼▲ annunciator will turn on.

This would be a logical and useful way for KEYG and KEYX to behave, but unfortunately, it's not true. Somehow the HP-42S firmware developers and documentation writers got out of sync.

There is no way that I know of to turn on the ▼▲ annunciator manually. (**)

(*) Could also have been the HP-42S Programming Examples & Techniques book.
(**) On the real HP-42S, anyway. In Free42, KEY 7/8 GTO/XEQ does turn on the ▼▲ annunciator; it's one of a very small number of deliberate differences between the original calculator and the app.