Hi there ... I was wondering if the ADDWF instruction can add a 8-bit value (W-accumulator) to the 12-bit program counter ... without any errors ... example code: LUT ; begin lookup table addwf PC ; consider PC is 0000 1111 1110 retlw 0x000 ; 0000 1111 1111 retlw 0x000 ; 0000 0000 0000 Err !!!!!! ???? or 0001 0000 0000 OK retlw 0x000 ; 0000 0000 0001 Err !!!!!! ???? or 0001 0000 0001 OK have a nice PIC-day ... Bart