HP16C logical operations (g shift + the keys in the "lower right corner")

[Hsilop]

Are the g-shifted logical operations in the "lower right corner" of the keyboard (the 0-3 digits, + and -, decimal point (.) and CHS keys) supposed to produce any result when used outside of a program?

I was expecting them to work on values entered on the stack, but nothing seems to happen in the display. One might expect some value(s) to be popped off the stack, and some new value to be pushed onto it - but that would change the stack which might not be desirable if some later operation (in a program) needs the value(s) in the x (and y) registers.

PS: I should mention that I tried this on a Swiss Micros DM16L, not a HP 16C, but then they should work the same - shouldn't they?