Scott Dattalo wrote: > > ; R0 7-0 = data > ; R1 15-0 = crc > ; > > eor R0,R0,R1 LSR 8 ; R0 = t = (crc>> 8) ^ data > eor R0,R0,R0 LSR 4 ; R0 = t ^ (t>>4) > eor R1,R0,R1 LSL 8 ; R1 = (crc << 8) ^ t > eor R1,R1,R0 LSL 5 ; R1 = (crc << 8) ^ t ^ (t<<5) > eor R1,R1,R0 LSL 12 ; R1 = (crc << 8) ^ t ^ (t<<12) > > Okay, yeah, it's a CRC algorithm, but which one? Seems to be CRCX25. x16 + x12 + x5 + x1 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics