Keith Dowsett wrote:
>
> At 22:28 12/05/97 +0200, you wrote:
> >Hello everybody !
> >
> >I'm learning PIC16C84 and I've got a simple problem (I think !).
> >
> >I'd like to make a small program which just count down from FFh to 00h by
> >example !
> >(to wait for the flashing of a led by example...)
> >I think that I will have to use the RAM to do that but I don't know how to
> >do that !
> >Is there a way to decrement or increment a variable (not a register) ?
> >
> >Thanks.
> >
> >              )|(
> >            (o o)
> > -----ooO--(_)--Ooo----
> > Jerome Avot  "YOYO"
> >    aavot@nordnet.fr
>
> How about decfsz?  It's in the data sheet. Here's an example:
>
> Short_delay     clrf    Your_variable
>                 decfsz  Your_variable
>                 goto    $-1
>                 return
>
> Keith.
>
> ==========================================================
> Keith Dowsett         "Variables won't; constants aren't."
>
> E-mail: kdowsett@rpms.ac.uk
>    WWW: http://kd.rpms.ac.uk/index.htm


This example is good apart from the fact it failes to say where
"Your_variable" is.

        If I understand the orignal question the writer asks how to decriment a
"Memory" variable. "Memory" variables have to be assigned first like
this :-

Your_variable       equ    0Ch

Where 0Ch is a "Memory" location in usable RAM

I hope this clears it up a little more

Cheers Peter ..........

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