http://www.mikroe.com/chapters/view/10/chapter-9-i nstruction-set/
Test tlacitka viz napr. BTFSC alebo BTFSS
Pocitanie slucky viz DECFSZ
Ten tvoj kod je nezmysel
opakuj movf PORTB,0 ;z PortuB W
movwf PORTA ;konstanta načtena na port R
goto opakuj
???