公开(公告)号：JPH07154451A

公开(公告)日：1995-06-16

申请号：JP15344594

申请日：1994-07-05

Applicant: TANDEM COMPUTERS INC

Inventor： JIYON SHII FURIIMAN ,  CHIEN GAN KON

IPC: G06F13/00 ,  H04L1/00 ,  H04L29/06 ,  H04L29/14 ,  G06F15/16

Abstract: PURPOSE: To make it possible to reconstitute a system by checking whether a data field generated in specific communication is to be allowed by a communication protocol or inhibited. CONSTITUTION: Respective M and N fields generated from a bus are latched by M and N latches 32, 34 at proper time and respectively sent to a row MUX 35 and a column MUX 36 and unique row and column corresponding to respective fields are selected. A selected output is sent to one input of an output AND gate 38 and a timing window signal (optional) is sent to the other input to generate a clocked error signal. Thus an error check signal for instructing whether a pair of 1st and 2nd data fields are to be allowed by a communication protocol or not is selected, and when the prescribed pair is not allowed by the communication protocol, the selected error check signal stops the specific communication operation.