Word Processing Display Unit with Means for Indicating Communications Status
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
The present apparatus relates to communications via serial data links between word processing display work stations using binary synchronous communication. During such communication, there are many circumstances during sending and receiving when one of the terminals is in "wait" status. During normal momentary delays in a properly functioning communication system, this "wait" status is common. However, it will also occur when there is an error condition which will impede the normal operation of the communications linkage. The present system provides a protocol expedient which will distinguish normal "wait" conditions from the "wait" conditions caused by errors.