Hello,

I just started to learn Pic programming.  Can someone comment on my coments
about this program?

org     0

clrf    PORTB                   ; Clear all the bits in PortB
This line clears PORTB to all 0's right?

bsf     STATUS, RP0             ; Goto bank 1 to set port direction
This switches to bank 1

bcf     TRISB & 0x07f, 0        ; Set bit 0 to output
Here is where I have trouble.  If I understand this correctly,  this should
take 00000000 and (and) it
with 01111111.  Am I right?

bcf     STATUS, RP0             ; Go back to bank 0
It then switches back to bank 0.
Finished
Goto    $

end

Another thing I want to know is how can you clear PortB if you don't switch
banks first?  I mean according to Mykes book,  which is where I copied this
program from, the above code says it is ok to clear PortB, but to set the
I/O direction, you need to switch banks first.

TIA,
Brian
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