OK, any ideas on this one? This is my code:


Code:
;----[16F1826 Hardware Configuration]-------------------------------------------
#IF __PROCESSOR__ = "16F1826"
  #DEFINE MCU_FOUND 1
#CONFIG
cfg1 = _FOSC_HS               ; HS Oscillator, High-speed crystal/resonator connected between OSC1 and OSC2 pins
cfg1&= _WDTE_OFF              ; WDT disabled
cfg1&= _PWRTE_OFF             ; PWRT disabled
cfg1&= _MCLRE_OFF             ; MCLR/VPP pin function is digital input
cfg1&= _CP_OFF                ; Program memory code protection is disabled
cfg1&= _CPD_OFF               ; Data memory code protection is disabled
cfg1&= _BOREN_OFF             ; Brown-out Reset disabled
cfg1&= _CLKOUTEN_OFF          ; CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin
cfg1&= _IESO_OFF              ; Internal/External Switchover mode is disabled
cfg1&= _FCMEN_OFF             ; Fail-Safe Clock Monitor is disabled
  __CONFIG _CONFIG1, cfg1

cfg2 = _WRT_OFF               ; Write protection off
cfg2&= _PLLEN_OFF             ; 4x PLL disabled
cfg2&= _STVREN_OFF            ; Stack Overflow or Underflow will not cause a Reset
cfg2&= _BORV_HI               ; Brown-out Reset Voltage (Vbor), high trip point selected.
cfg2&= _LVP_OFF               ; High-voltage on MCLR/VPP must be used for programming
  __CONFIG _CONFIG2, cfg2

#ENDCONFIG

#ENDIF

;----[Verify Configs have been specified for Selected Processor]----------------
;       Note: Only include this routine once, after all #CONFIG blocks
#IFNDEF MCU_FOUND
  #ERROR "No CONFIGs found for [" + __PROCESSOR__ +"]"
#ENDIF

DEFINE OSC 4
TRISA = %00000000
TRISB = %00000000

Low PORTA.1 
Low PORTA.4 

PORTA.1 = 1
pause 1000
PORTA.4 = 1
pause 1000
PORTA.4 = 0
PORTA.1 = 1
end
:
When I run the code, and LED attached to PORTA.1 goes ON as expected. However, when I code PORTA.4 = 1, then PORTA.1 goes low and the LED turns OFF!

After the second 'pause 100', then PORTA.1 = 1 does indeed turn the LED back ON.

Are these two ports interacting in some way that I am not aware of?

Help! :-)