Hello, The following ADC code for a 12F675 constantly returns zero (puts 0 in
ADRESH).

;******** Initialization ************
 clrf   GPIO
 clrf   INTCON

 bsf    STATUS,RP0
 movlw  0x0FC
 movwf  TRISIO ^ 0x080          ;GPIO 0,1 are outputs
 movlw  0x080
 movwf  OPTION_REG ^ 0x080      ;pullups off
 movlw  0x05                    ;Fosc/16, AN3 (GPIO4) is analog input
 movwf  ANSEL ^ 0x080
 clrf   PIE1 ^ 0x080
 bcf    STATUS,RP0

 clrf   N
;****** END Initialization **********


;************* Main *****************
main
 movlw  0x00C                   ;left justified, channel 3 (gpio 4)
 movwf  ADCON0                  ;Vref = Vdd

 movlw  7                       ;wait for adc to charge
 addlw  0x0ff
 btfss  STATUS,Z
  goto  $ - 2

 bsf    ADCON0,GO               ;start ADC
 btfsc  ADCON0,GO               ;allow ADC to finish
  goto  $ - 1

 movf   ADRESH,w
 movwf  N                       ;place 8 upper bits in N

 call   Serout                  ;output N

 call   onesec
 goto   main
;*********** End Main ***************

If anyout could clear this up for me I'de be gateful.
Thx, Steve

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