Hi everyone,

I am writing a program for the PIC16F877.  Suddenly, I get the following
message "Crossing page boundary -- ensure page bits are set".  I read the
specs and it say that I can switch to different programming page by
manipulate PCLATH <4:3>

Please correct me if I am wrong (I can't find this info in the spec, so I am
just guessing)

PCLATH<4> | PCLATH<3> | GOTO PAGE
--------------------------------
   0           0        Page 0
   0           1        Page 1
   1           0        Page 2
   1           1        Page 3

Right?

And I also have some questions:

1.  What address do page 1, page 2, and page 3 start with?

2.  If I place a subroutine in Page 1, and I want to call it from page 0, do
I have to go to page 1 first before I can do a call (then switch back to
page 0 to continue)?

3.  Is there any trick to automatically switch the page?  Is there any trick
the treat the entire 8K of program memory as ONE page?

Thank you very much!
Thomas

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