please dont rip this site

Regulus Berdin [rberdin at BIGFOOT.COM]

this is 2x faster (500kbps @ 4MHz) :

; serial tx
; assumes PORTB1 initially on high state

        rrf     data,w
        xorwf   data,f

        movlw   1
        xorwf   PORTB,f         ;start bit

         xorwf  PORTB,f         ;b0

        btfsc   data,0
         xorwf  PORTB,f         ;b1

        btfsc   data,1
         xorwf  PORTB,f         ;b2

        btfsc   data,2
         xorwf  PORTB,f         ;b3


        bsf     PORTB,0         ;

file: /Techref/microchip/rs232at500kbps.htm, 0KB, , updated: 2000/5/2 09:26, local time: 2021/12/7 07:49,

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