Hi, Peter, thank you very much for your comments. I am glad to hear
someone willing to help me in solving the questions.

I contemplated at the B: way sometimes, but have never used it,
just A: stamp. It will be implemented now, thanks for pointing
me at the more effective code.

01. Now it's clearly, thanks.

02. Here, I did not stand the question clearly, probably.
I understend that the switch() routines are implemented
by defferent ways from switch to switch. But, in case of
switch of 11 ceses it's impossible to execute the program
step by step, the program jumps to some unexpected address,
and runs away of the switch(). Stack is not overflowed at
this momement.

Best regards,
Oleg