The bits on PORTA, PORTB etc do _not_ have names in the .INC file.

Just use the syntax  PORTB,3 for pin RB3

Bob Ammerman
RAm Systems

----- Original Message -----
From: "Rex Byrns" <rexb@TESTENGEER.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, May 17, 2002 9:55 AM
Subject: Re: [PIC] Shift Register Useage-TPIC6A595


> Just to let everyone know - using MPLAB 5.60.00 - Device file version
> 5.00.41
>
> bsf PORTB,RB4
>    |
> returns on build
>    |
> Error[113]   C:\PROGRA~1\MPLAB\FEEDER2.ASM 117 : Symbol not previously
> defined (RB4)
>
> My P16f84a.inc file contains nothing about any of these bits on the ports.
> The file mod date and time are the same as many other files of this type.
>
> I see how I could easily add them in.  The  revision info is:
>
> ;Rev:   Date:    Reason:
>
> ;1.00   2/15/99 Initial Release
>
> Is there something I am missing?
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Andrew Warren
> Sent: Thursday, May 16, 2002 5:18 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC] Shift Register Useage-TPIC6A595
>
>
> Rex Byrns <PICLIST@mitvma.mit.edu> wrote:
>
> > Does for example        bsf PORTB,RB3
> >                         bsf PORTB,RB4
> >                         bsf PORTB,RB2
> >
> > use more memory than
> >                         movlw B'00011100'
> >                         movwf PORTB
>
>     Yes.  On your PIC (you can verify this by reading the datasheet),
>     each instruction consumes one word of memory.  Three BSFs takes
>     three words of memory and a MOVLW/MOVWF pair takes only two.
>
>     The MOVLW/MOVWF will force bits 0, 1, 5, 6, and 7 of PORTB to 0
>     (which you may or may not be a good thing in your application),
>     and it will also sidestep any read/modify/write issues that
>     might prevent bits 3 and/or 4 from being set to 1 (which is a
>     good thing in nearly all applications).
>
>     It also runs faster (2 instruction cycles versus 3).
>
>     -Andy
>
> === Andrew Warren -- aiw@cypress.com
> === Principal Design Engineer
> === Cypress Semiconductor Corporation
> ===
> === Opinions expressed above do not
> === necessarily represent those of
> === Cypress Semiconductor Corporation
>
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