hi all I new user of pic microcontroller. facing problem in lookup table using command lookup jmp pc+w retw 00h,01h,02h,03h,04h retw 00h,05h,06h,07h,08h retw 00h,09h,02h,03h,04h retw ......... this command "jmp pc+w" did not return with w on its location it return but undefined location. give solution of my problem or an practical example of lookup table for 128 bytes. Kashif ali -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads