On Sat, Jun 07, 1997 at 05:27:53PM -0300, Rildo Pragana wrote:

>   I'm really atonished with a problem that's ocurring with my present

Without even thinking about the symptoms you describe, I can see a major
error in your interrupt save code:

> intr    swapf   w_tmp,f         ;1 save w and status

This line does NOT save w in memory - it just nibble-swaps what is
already in memory. Your interrupt code should read:

intr    movwf   w_tmp           ;1 save w and status
        movf    STATUS,w        ;1
        movwf   st_tmp          ;1
        bsf     _rp0            ;1
        bcf     _t0cs           ;1 switch to internal clock in TMR0
        bcf     _rp0            ;1
        bcf     _t0ie           ;1 no more interrupts, please
        bcf     _t0if           ;1
        bsf     _sbf            ;1
        movlw   -.26            ;1 mark time for end of 1 1/2 bit
        movwf   TMR0            ;1
;
iend    movf    st_tmp,w        ;1 recover w and status
        movwf   STATUS          ;1
        swapf   w_tmp,f         ;1 pre-swap saved w so that
        swapf   w_tmp,w         ;1  we restore original contents of w
        retfie                  ;2+2

This should help a _great_ deal - it may not be your only problem, though.
Try it and see.

Have fun!

--
Clyde Smith-Stubbs    | HI-TECH Software,       | Voice: +61 7 3354 2411
clyde@htsoft.com      | P.O. Box 103, Alderley, | Fax:   +61 7 3354 2422
http://www.htsoft.com | QLD, 4051, AUSTRALIA.   |
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