Common Netlinx Checksum Calculations
Written by Gary Brindley
Updated at December 29th, 2025
Question:
What are some common checksum calculations in Netlinx programming?
Answer:
The attached checksum.axi file contains many common checksum calculations.
The included checksum calculations are:
- checksumAdd (A sum of all bytes, the most common checksum)
- checksumBxor (bxor bitwise exclusive or checksum, for some Sony)
- checksum1sCompliment (1's compliment checksum)
- checksum1sCompliment2byte (1's compliment checksum, returns "lo byte,hi byte" for Hitach HVD30)
- checksum2sCompliment (2's compliment checksum)
- checksum2sCompliment7bit (2's compliment checksum, 7 bit for roland/yamaha MIDI sysx)
- crc8
- CRC16 (IBM Checksum)
- crc16_bitwise
- CRC16C (CCITT Checksum)
- CRC32 (IEEE 802.3 Checksum)