This may help you a bit. I've been playing with the 12F683.

Code:
@	__CONFIG _INTOSCIO & _FCMEN_OFF & _IESO_OFF & _BOD_OFF & _BOD_OFF & _CP_OFF & _MCLRE_ON & _MCLRE_OFF & _PWRTE_ON & _WDT_OFF

DEFINE OSC 8           ' Internal 8MHz
DEFINE ADC_BITS 8      ' 8-bit resolution
DEFINE ADC_CLOCK 2     ' Set clock source to Frc/32
DEFINE ADC_SAMPLEUS 50 ' Sample time in uS before A/D conversion is started

CMCON0 = 7   			'Comparators off
ADCON0 = %00000001		'ADC enabled and right justified
ANSEL = %00001000		'GPIO.0 and GPIO.1 analog input
INTCON = 0				'INTERRUPTS off
OSCCON = %01110000		'8 Mhz
TRISIO = %111011		'GPIO2 output
GPIO = %00010000 		' All outputs = 0 on boot