just when i understood what was going on, i read this rebuttal.  interesting,
but as a novice i think i'm even more confused now than i was before!
can't wait to here from both sides.

-Fernando

In a message dated 97-11-26 15:57:13 EST, you write:

> On Wed, 26 Nov 1997 09:50:33 -0500 myke predko <myke@PASSPORT.CA> writes:
>
>  >>movlw 0x0F8
>  >>andwf STATUS
>
>  >The purpose of this was to clear the Zero, Half Carry and Carry >Flags
>  in the Status Register so changes caused by different >instrutions could
>  be easily seen.
>
>  It doesn't work this way though.  Since the andwf instruction inherently
>  affects the Z flag, the PIC logic will 'lock out' the write to the other
>  2 flags.  The result:
>
>  Z - Set if high 5 bits of STATUS = 00000, clear otherwise.
>  C - Unchanged.
>  DC - Unchanged.
>
>  I suggest using either 3 bcf instructions or movlw 0 / movwf STATUS to
>  clear the flags.  This also clears the page select bits of course.
>  Notice that clrf STATUS will not work for the same reason andwf STATUS
>  doesn't.  However, movwf doesn't inherently affect any status bits so it
>  will write to the bits properly.
>
>