> Ok so all this PCLATH setting bits are required if you call or goto
accross
> a page boundry. What happens when normal program flow carries you over a
> boundry? Does PCLATH get updated automatically? or is it still up to you
to
> set it.
>
> Say my program has a massive init sequence and the starting code runs
> halfway into page 1. When i then issue a call to a procedure ( also
located
> in page 1 ) will pclath be set to page 1 or must i set it myself? In other
> words did it update itself when program execution flowed from page 0 to
page
> 1?

This has been beat to death many times.  Check the archives (or better yet,
read the manual).

The short answers:

1  -  Nothing happes to PCLATH automatically.

2  -  It is best to avoid having code within a routine or module cross a
page boundary.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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