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Here is the first calculation for computing a 3-bit CRC: ... CRC-16-IBM: Bisync, Modbus, USB, ANSI X3.28, SIA DC-07, many others; also known as CRC-16 and CRC-16-ANSI:
little_endian_table[0] := 0 crc := 1; i := 128 do { if crc and 1 { crc := (crc rightShift 1) xor 0x8408 // The CRC polynomial} else { crc := crc rightShift 1 } // crc is the value of little_endian_table[i]; let j iterate over the already-initialized entries for j from 0 to 255 by 2 × i { little_endian_table[i + j] := crc xor little_endian ...
The cyclic redundancy check (CRC) is a check of the remainder after division in the ring of polynomials over GF(2) (the finite field of integers modulo 2). That is, the set of polynomials where each coefficient is either zero or one, and arithmetic operations wrap around.
Special hardware assists in the calculation of a cyclic redundancy check for detection of transmission errors. Both CRC-16 CCITT and CRC-16 IBM are supported. Assuming the running value is maintained in storage, the execution time to accumulate one more byte is five storage cycles (three instructions). Rapid context switching was a design ...
Usually, the second sum will be multiplied by 2 16 and added to the simple checksum, effectively stacking the sums side-by-side in a 32-bit word with the simple checksum at the least significant end. This algorithm is then called the Fletcher-32 checksum. The use of the modulus 2 16 − 1 = 65,535 is also generally implied. The rationale for ...
CRC—Cyclic redundancy check; CRLF—Carriage return line feed; CRM—Customer Relationship Management; CRS—Computer Reservations System; CRT—Cathode-ray tube; CRUD—Create, read, update and delete; CS—Cable Select; CS—Computer Science; CSE—Computer science and engineering; CSI—Common System Interface; CSM—Compatibility support ...
IBM's Poughkeepsie site is where the z16 mainframe is tested and manufactured, continuing a six-decade history of mainframes at the site.
This is a list of hash functions, including cyclic redundancy checks, checksum functions, and cryptographic hash functions. This list is incomplete ; you can help by adding missing items . ( February 2024 )