Parity Check Error Byte Generator For Microprocessor
Original Publication Date: 1979-Jun-01
Included in the Prior Art Database: 2005-Feb-20
Parity check circuits have been used extensively in data processing systems to verify the operation of certain key components and the transfer paths to and from these components. Generally these check circuits, upon receipt of a byte of data, generate a new parity bit from the received byte and compare it with the parity bit associated with the transferred byte. When a comparison is indicated, it is assumed that no errors occurred either in the transferred byte or the components associated with the transfer. The assumption is valid provided some means are provided to periodically check the operation of the parity check circuit.