Hi - I need some help getting my program to recover from sleep
properly.  My configuration turns the watch dog timer off, power up
timer is on, and the prescaler is assigned to timer 0 (TMR0).  I exit
sleep using the transition on the external interrupt pin (RB0/INT).  The
interrupt service routine (ISR) sets iflag and clears the INTF flag.
When the sleep instruction is encountered in the code shown below, GIE
and INTE have been set so the ISR should excute after the NOP (after
sleep).  I added 200ms extra delay (delay d'20' below) to allow the
oscillator more time to stablilize before returning to the main part of
the code (this program is for a frequency counter).  What happens on
exiting sleep is that program execution ends up in a subroutine called
by user_prog (at next1) instead of next2. I can't fathom how it gets
there.  I've also done a version of this code where I turn GIE off
before the sleep instruction and clear INTF and then set GIE after the
sleep instruction (and also clear iflag) but get the same result.  The
code segment below is the main loop of the program.  I'd appreciate any
ideas on how to debug this.  Please respond direct. Thanks.

Ron

------------------------------------------------------------------------------

next    movlw   d'1'
        movwf   flash_1
        clrf    mflag
        bsf     mflag,0
        call    select_f
        goto    next2
next1   call    user_prog
next2   call    freq_count
        call    freq_adj
        call    bin2bcd
        call    display_out
        decfsz  iflag,w
        goto    next3
        goto    next1
next3   delay1  number_off
        decfsz  iflag,w
        goto    next4
        goto    next1
next4   decfsz  flag_sleep,w
        goto    next5
        sleep
        nop
        delay   d'20'
        clrf    iflag
next5   goto    next2
        end