Andre Abelian <engelec@earthlink.net> wrote:

> I need to know the function of nop in this sourse code.
> I know nop means no operation and  saves one cycle
> but still I do not imagine the purpose of nop in this code.
>
> port_setup
>         movlw   h'3e'
>         movwf   gpio
>         nop             ; what does nop do in this line?
>         movlw   h'3e'
>         tris    gpio

Andre:

I'd guess that the NOP was placed there by an overly-cautious
programmer who believed that a small delay might ensure the
reliability of his port-setup code.  It's probably unnecessary.

-Andy

=== Andrew Warren - fastfwd@ix.netcom.com
=== Fast Forward Engineering - Vista, California
=== http://www.geocities.com/SiliconValley/2499