Hi,
The _A-CDS gives the offset of A from CDS. It's used to add
the offset of _A onto the PC to get the correct place to return the
data. Used in a routine to output data to an lcd here by the looks
of it.
Martin
{Quote hidden}> Hi to all,
>
> I see this example code in some body else's design and I
> do not clearly understand the meaning of " movlw _A-CDS "
> or movlw _B-CDS. Since _A, _B and CDS are labels what is the purpose of
> subtracting from
> each other . can some body explain more about this.
>
>
>
> CDS
> _A
> retlw H'80'
> dt "A"
> retlw 0
>
> _B
> retlw H'81'
> dt "B"
> retlw 0
>
>
> movlw _A-CDS
> call output
>
>
> Andre
