KG11-A Exclusive-OR and CRC Block Check Option

The KG11-A Exclusive-OR and CRC Block Check Option is a UNIBUS co-processor which can calculate a number of different CRCs for use in data communication links. Data is transferred to and from the KG11 using programmed I/O.

The CRC computations it supports are:

• LRC-8 = X⁸ + 1
• LRC-16 = X¹⁶ + 1
• CRC-16 = X¹⁶ + X¹⁵ + X² + 1
• CRC-12 = X¹² + X¹¹ + X³ + X² + X + 1
• CRC-CCITT = X¹⁶ + X¹² + X⁵ + 1

The KG11 is a single quad card.

External links

• KG11-A exclusive-OR and CRC block check manual (DEC-II-HKGAA-B-D)
• KG11-A Engineering Drawings