In message  <199703251959.NAA23125@dfw-ix5.ix.netcom.com> PICLIST@MITVMA.MIT.EDU
 writes:
> Mayes uk <mike@d-m-g.demon.co.uk> wrote:
>
> > If I declare a constant with more than 2 bytes, is it possible
> > to access the middle bytes?
> >
> > Example:
> >
> > MyConst  equ  h'01020304'
> >
> >    movlw   ???? (MyConst)    ;how do I access the 3rd byte???
>
> Mike:
>
>     MOVLW ((MYCONST) >> 8) & 0xFF
>
> It's probably easiest if you use parameterized #DEFINEs to define
> the shift-and-AND operations for each byte-position... Then you can
> just say:
>
>     MOVLW LSB2(MYCONT)
>
> or whatever.
>
> By the way, it's best to use shift-and-AND macros instead of LOW and
> HIGH... In at least some versions of M
>

Thanks for the reply, Andy.

One phrase I didn't understand was "parameterized #DEFINEs". Can
you give me an example?

Regards,


Mike