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Thanks for sharing that Dwayne. I wrote this 12F program to test it
and attach an analyser output to show exactly what it does

; 1-wire debugger
; Dwayne Reid
; 23/08/07

   list P = 12F675
   include "P12F675.inc"

   errorlevel -305, -302, -306   ;MPLAB error suppression

 __CONFIG _CP_OFF & _INTRC_OSC_NOCLKOUT & _BODEN_OFF & _WDT_OFF & _PWRTE_ON
& _BODEN_OFF & _MCLRE_ON

; Fosc = 4MHz, instruction time 1us

         cblock 0x20

         stmp1
         stmp2
         stmp3

         endc

;  Vdd       Vss
;  GP5       GP0  debug
;  GP4       GP1  do debug
;  GP3       GP2

#define  _stxout  gpio,0          ;debug
#define  do_debug gpio,1          ;do debug switch

         org 0x00

         goto    start

  org 0x04

start    nop
         banksel osccal

         call    0x3ff
         movwf   osccal

         banksel ansel
         clrf    ansel           ;digital inputs

         movlw   b'00000010'
;                  xxxxxx
;                        1        pushbutton
;                         0       debug
         movwf   trisio

         movlw   b'10000000'
;                  1              pullups off
         movwf   option_reg

         banksel gpio

         clrf    gpio
         movlw   b'00000111'      ;GPIO 0,1,2 as digital
         movwf   cmcon

;================================================
;        Call data send routine
;================================================

call_db  btfsc   do_debug         ;wait for PB push
         goto    $-1

         movlw   0x00
         call    debug

         movlw   0x01
         call    debug

         movlw   0x02
         call    debug

         movlw   0x55
         call    debug

         movlw   0xaa
         call    debug

         movlw   0xff
         call    debug

         btfss   do_debug         ;wait for PB release
         goto    $-1

         goto    call_db          ;repeat

;================================================
;        Send data
;================================================

;data to send in W

debug    movwf   STMP1
         movlw   .8               ;8 data bits, no start or stop bits
         movwf   STMP2

         bcf     _STXOUT

         clrf    STMP3            ;save current state of o/p line
         btfsc   _STXOUT
         decf    STMP3,F

StxLoop                           ;8 cy loop: 125 Kb/s
         bcf     _STXOUT          ;2 cycles LO
         rlf     STMP1,F
         bsf     _STXOUT
         skpc                     ;2cy HI + 4 cy LO **or** 6 cy HI
         bcf     _STXOUT
         decfsz  STMP2,F
         goto    StxLoop

         bcf     _STXOUT          ;make sure can see end of last pulse
         goto    $+1

;restore output pin state

         btfsc   STMP3,0
         bsf     _STXOUT
         btfss   STMP3,0
         bcf     _STXOUT
         return                   ;81 cycles total, including call & return

  end


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