| 摘要 |
PURPOSE:To make unnecessary the memory unit and signal lines for parity bit, by adding the parity bit immediately after the output instruction of one block and performing the parity check immediately before the execution of block output instruction. CONSTITUTION:The parity check register PCR is independently provided, and the operation of exclusive logical sum EOR between the instruction code and the code in the parity check register PCR is made before the execution of each instruction, and the result is again stored in the parity check register PCR. This operation is repeated in each instruction, and the parity bit is picked up before the execution of instruction and parity check is made at final output instruction. |
