Hi everyone,

I have some questions for the PIC16F877:

If I have DATA1 stored in BANK0, and I want to copy the content of DATA1 to
DATA2 in BANK1.  Do I have to:

1. Go to BANK0
2. Get DATA1 in W
3. Go to BANK1
4. Store W in DATA2.

Please let me know if I got the correct sequence.  OR can I access the
memory on BANK0 directly while I am on Bank1, 2 or 3?


Is it better to execute all codes in BANK0, and only switch to BANK1, 2, or
3 when needed to access something, then switch back to BANK0 right away?

Looking at the memory map of the PIC16F877, on BANK1, 2, and 3.  There is a
section labelled "accesses 70h-7Fh".  What does it mean?  I am guessing that
if I put data on BANK0 from location 70 to 7F, I can access the data from
any bank (without having to switch back to bank0).  Am I right?

Sorry for so many questions.
Best regards,
Thomas




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