----- Original Message ----- 
From: "Olin Lathrop" <olin_piclist@embedinc.com>
Subject: Re: [PIC]PIC16F877 syntax: What is HIGH and LOW?


> Wallace Yang wrote:
>> What is HIGH and LOW?
>
> Assembler operators.
>
>> I can't find any description of
>> them in the PIC16F87X data sheet.  Are they described
>> in other documents at the Microchip website?
>
> Yes.  MPASM User's Guide with MPLINK and MPLIB.

The MPASM User Guide is an important document to have.  The datasheets 
detail the assembler instructions, but there are a boatload of directives 
and operators that aren't found in the datasheet.

Another surprisingly good place is the help file.   In particular, browse 
through the "Assmebler Syntax and Operation"  and the "Directives" sections. 
These fill in most of what's missing for the datasheet.  The descriptions 
are somewhat terse, but often it's quicker to find things there.  The high, 
low and upper operators each occupy one line of a table, with a four word 
description, so it's not exactly tutorial.  But often it is enough to tell 
you what you want to know.

--McD

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