Thank you, thank  you.  I feel even sillier having left out
something I've used a dozen times before.  But you rescued my
sanity.

Andrew




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---- On Thu, 25 Jan 2007, Andrew Kieran (akieran@ureach.com)
wrote:

> I feel pretty silly bringing up this problem, but I've tried
> everything I can think of.  I can't run
> the simple code snippet shown below in the MPLAB v7.50
> simulator.
> 
> It is suppossed to set up all PORTA pins as outputs and send
> 0x0f to the port.  But after running this in MPSIM, PORTA
> contains 0x00 rather than 0x0f.
> 
> I have checked that the processor include file is there, it
> defines PORTA correctly, and it is being used.  A Watch window
> correctly shows PORTA at it's 0x05 address.  MPSIM is set for
> the correct CPU, and specifiying a radix parameter has no
> effect.
> 
> I tried creating a brand new project and source code files,
but
> the result was the same.  
> 
> Have I run into a bug or did I miss something that is or
should
> have been glaringly obvious?  Interestingly, it works if I
> change PORTA/TRISA to PORTD/TRISD.
> 
> Thanks in Advance,
> Andrew
> 
> 
> 
> 	processor     	16f877a		; list directive to define processor
> 	#include	P16F877A.INC	; processor specific variable
definitions
> 	
> 	__CONFIG _CP_OFF & _WDT_OFF & _BODEN_ON & _PWRTE_ON & _HS_OSC
&
> _LVP_OFF & _DEBUG_OFF & _CPD_OFF
> 
> 
> 	ORG     0x000			; processor reset vector
> 	bsf	STATUS, RP0
> 	clrf	TRISA ^ 0x80
> 	bcf	STATUS, RP0
> 	movlw	0x0f
> 	movwf	PORTA
> 	goto	$
> 
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