Hi.

ANSWERS :
1) if you use the ports for input, you dont have to init
them, if you use the ports for output, usualy
you will init them to other value than 0xffh
2) the MCU has a power-on values, those values are always
the same, as far as i know, the default bank is
bank0
3) I guess you mean to end the program while running
I dont know if there such a command, but the way
I do it, is to make lable the "END" command
and whenever I need, I jump to there.
4) If you use the C51, it is possible, with ASM51 I donnow.

Goodluck
OK