Hello all,
    I'm having a problems waking up a 12c509 OTP (internal RC, WDT_ON, 3
volt LI cell supply, Normal temperatures) from sleep.  Below is a sample of
the code which was compiled using MPASM v1.4 and programmed with a PIC-1A
programmer.  It's supposed to wakeup every so often and flash some lights
and supply a discrete to a music IC.  In situ it never wakes up from the
first sleep instruction.  Can someone help me out?
Thankyou,
Dave

        TITLE           "Christmas Ornament Project"
        SUBTITLE        "Controlling LED's and Melody IC"
;***************************************************************************
******************************
;Abstract:  This program is written to control led's and a melody IC on a
;simple Christmas ornament.  Approximately every half hour the ornament will
;play a tune and flash some led's. THIS PROGRAM IS WRITTEN FOR A 4 MHZ CLOCK
;FREQUENCY.
;
; Program Name:                 orn.asm
;
; Revision History:
;
;       Revision Date:          28 Nov 1997       Original
;       Written by:             David & Sarah Ebsen
;***************************************************************************
******************************
;        PROCESSOR       12509-04
;        RADIX           DEC
         EXPAND
;                __IDLOCS        H'DEAD'
;                __CONFIG        H'000E'
          INCLUDE         "ORN12.H"
          __FUSES _MCLRE_OFF & _CP_OFF & _WDT_ON & _IntRC_OSC

         ORG     RESETVECTOR
         GOTO    START1

         ORG     INTVECTOR
         GOTO    START1
;***************************************************************************
******************************
;                                       Main Program
;***************************************************************************
******************************
START1:
        BTFSS   TO              ;SEE IF THE WDT EXPIRED.
        GOTO    TIMER
        CLRF    LOW8           ;Clear timer variables.
        CLRF    UPPER8
        CLRF    STATUS
        MOVLW   0xCF
        OPTION                           ;SET 1:128 PRESCALE TO WDT
        CLRW
        TRIS    GPIO                ;Set all to outputs
        CLRF    GPIO
        CLRWDT

    ;*****************Troubleshooting stub ****************************
        BSF     LED2
        MOVLW   255                    ; Good  here
        CALL    MSEC_DELAY
        BCF LED2
    ;**********************************************************************

        CALL   PLAY_SONG    ;Processor executes PLAY_SONG but
        SLEEP                            ;never wakes up from this sleep.


TIMER:

    ;*****************Troubleshooting stub ****************************
        BSF     LED1
        MOVLW   255                    ;This never happens!!
        CALL    MSEC_DELAY
        BCF LED1
    ;**********************************************************************

        INCFSZ  LOW8, F
        SLEEP

    ;*****************Troubleshooting stub ****************************
        BSF     LED2
        MOVLW   255                        ;This never happens!!
        CALL    MSEC_DELAY
        BCF LED2
    ;**********************************************************************

        INCF    UPPER8
        MOVLW   3
        SUBWF   UPPER8, W
        BTFSS   Z
        SLEEP
        CLRF    UPPER8
        CLRF    LOW8
        CALL    PLAY_SONG
        SLEEP