hi seems that no one wants to reply...please anyone I need your help or at least give me an idea and also can I ask what does this mean:

whats the difference between these two?
ADCON1 = %00001011
ADCON1 = 4

option_reg = $7f
OPTION_REG.7 = 0 'Enable PORTB pull-ups

TRISB = %11110000

what does $7f do, anyone who can show me something like the one above.