I have been trying to get this very small program to compile, however, 
below are the program code and error messages I received. I get 15 errors 
about symbols not being defined. I found what the 113 error was in an 
excerpt of chapter 8 of the Assembler/Linker/Librarian Users guide. 113 is 
"Symbol not previously defined" I tried to add #define to the program with 
only minor success. See below: I may not be the brighest coal in the fire 
but I will be the most persistent.

 ;testprog.asm
;
; 8th October 2005
;
; LED blinky

   list P = 16F877
   include "P16F877.inc"

 errorlevel -302, -305, -306

; turn off some MPASM messages

; 302 not in bank0
; 305 default destination of 1
; 306 crossing page boundary
; 113 symbol not previously defined "Can't disable this error code"

; Instruction cycle time = 400ns with 10MHz crystal

;set configuration

  __CONFIG _CP_OFF & _WRT_ENABLE_ON & _HS_OSC & _WDT_OFF & _PWRTE_OFF & 
_BODEN_OFF & _LVP_OFF & _CPD_OFF & _DEBUG_OFF

         cblock 0x20

         varname1             ;some variables
         varname2
         varname3

         endc

; define a pin name

#define  led     portb,1      ;pin to drive LED
#define porta
#define portb
#define portc
#define portd
#define porte
#define trisa
#define trisb
#define trisc
#define trisd
#define option_reg

;program address start in memory

         org     0x00         ;start address
         goto    delay

; interrupt vector

;         org     0x04         ;REM if interrupts not used
;         goto    isr          ;REM if interrupts not used

init     clrf    status       ;bank0

         clrf    porta
         clrf    portb
         clrf    portc
         clrf    portd
         clrf    porte

         banksel trisa        ;set data direction on pins

         movlw   b'00000000'  ;all PortA as output
         movwf   trisa


         movlw   b'00000000'  ;all PortB as output
         movwf   trisb


         movlw   b'10000000'  ;all PortC as output
         movwf   trisc

         movlw   b'10000000'  ;all PortD as output
         movwf   trisd

         movlw   b'10000000'
;                  1           internal pull-ups off

         movwf   option_reg   ;INTEDG = 0, falling edge for microswitch

         banksel porta        ;return to bank0

;===============================================

led_loop bsf     led          ;turn LED on
         call    delay        ;0.2s delay
         bcf     led          ;turn LED off
         call    delay        ;0.2s delay
         goto    led_loop     ;blink forever (what a life)

delay    movlw   .56          ;call 1ms delay 200 times
         movwf   varname1
ms1      call    msec01
         incfsz  varname1
         goto    ms1
         return

msec01   movlw   .30          ;delay approx 1ms @ 10MHz
         movwf   varname2
loop     nop
         nop
         nop
         nop
         nop
         nop
         nop
         nop
         incfsz  varname2
         goto    loop
         return

  end


Clean: Deleting intermediary and output files.
Clean: Done.
Executing: "I:\Program Files\Microchip\MPASM Suite\MPAsmWin.exe" /q /p16F877 
"testprog.asm" /l"testprog.lst" /e"testprog.err" /o"testprog.o"
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 48 : Symbol not previously defined 
(status)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 50 : Symbol not previously defined 
(porta)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 51 : Symbol not previously defined 
(portb)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 52 : Symbol not previously defined 
(portc)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 53 : Symbol not previously defined 
(portd)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 54 : Symbol not previously defined 
(porte)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 56 : Symbol not previously defined 
(trisa)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 59 : Symbol not previously defined 
(trisa)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 63 : Symbol not previously defined 
(trisb)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 67 : Symbol not previously defined 
(trisc)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 70 : Symbol not previously defined 
(trisd)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 75 : Symbol not previously defined 
(option_reg)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 77 : Symbol not previously defined 
(porta)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 81 : Symbol not previously defined 
(portb)
Error[113]   I:\MPLAB FILES\TESTPROG.ASM 83 : Symbol not previously defined 
(portb)
Halting build on first failure as requested.
BUILD FAILED: Sat Oct 08 18:16:53 2005

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist