KPL wrote:
>       code   ;Address determined
>              ;by the linker.
> Start clrw
>       option
>
> Everything is clear about them, but there is this directive (?)
> "option" which I have not seen before and can not find any description
> in the same document. What is it and what is it for?

Option is a instruction on some old 14 bit core PICs and current 12 bit core
PICs.

By the way, that is a bad example above.  You have to be careful, many
Microchip code examples are bad.

You should always give a section name to a code directive.  If you don't,
the assembler picks one for you anyway, which can have unexpected side
effects.  The section names also show up in the MAP file.  If you don't give
them clear names, it won't be so easy to tell how much space each piece of
code took.

Another bad habit this example illustrates is putting a instruction on the
same line as a label.

Let's say this code is in your LCD driver module.  A good example would be:

lcd    code
start
        <first instruction goes here>


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist