> The position of the stack
> pointer within the stack is completely unknown at power up

It is easier to regard the pic stack as not having a stack pointer but as a
chain of registers. Maybe it is even implemented that way. Consider a shelve
of 8 books. You can add one at the right side, and the leftmost book will
fall of the shelve and is lost forever. You can take off the rightmost and a
magic copying machine duplicates the leftmost book. There are ALWAYS exactly
8 books on the shelve. The pic starts with 8 'random' books. A wise man does
not return to one of these books.

Wouter van Ooijen
--
Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler, Wisp programmer, WLoader bootloader, PICs kopen

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu