If you use an EQU to assign a memory location for a variable,
you will NOT be able to "watch" it.  That means it will NOT 
show up in the "variable" list in the Show Symbols List option 
of the Window menu of MPLAB.

-----Original Message-----
From: Francisco Armenta [mailto:briones@DATASYS.COM.MX]
Sent: Tuesday, May 09, 2000 11:16 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: CONSTANT or EQU


Martin.

I use the EQU for assigned a memory location for a variable. and
CONSTANT for use a label otherwaise a number.

Francisco

Martin SchŠfer wrote:
> 
> Somebody out there who can explain me the difference between CONSTANT and
> EQU? After assembling, the two both become constants in the Cross
reference
> file. The same question could be asked about the difference between
VARIABLE
> and SET. The Users guide says only:
> 
> EQU - an Assembler Constant
> 
> CONSTANT - Symbol Constant
> 
> What I want to do is to define a constant for a reload value of timer 1,
> dependent on the frequency and perhaps some other parameters.
> 
>  constant TMR1H_SUB = D'1000' * Frequency / D'4000000' / 256
> 
>  TMR1H_SUB equ  D'1000' * Frequency / D'4000000' / 256
> 
> or something like this. This constant will then be used like
> 
>  movlw  TMR1H_SUB
>  subwf  TMR1H,F
> 
> Thanks for helping
> 
> martin
> 
> ;**********************************************
> ;**   name:      Martin Schaefer             **
> ;**   company:   elektronik 21 GmbH, Germany **
> ;**   e-mail:    schaefer@elektronik21.de    **
> ;**********************************************