GB1190498A - Data Processing System. - Google Patents

Abstract

1,190,498. Data processing in exchange systems. INTERNATIONAL STANDARD ELECTRIC CORP. 30 Oct., 1968 [7 Nov., 1967], No. 51487/68. Heading H4K. In an exchange system one of a number of processors working in parallel is nominated in cyclic order for each processing cycle to take on all new exchange tasks initiated in a cycle, further processing required for any task being continued in later cycles by the processor that took up the task initially. As shown in Fig. 1, an exchange GE sends data to two processors R1, R2 by way of register E and receives processed data by way of register S. The processors Ri, R2 have logic sections RW1, RW2, input buffers ER, output buffers AR, and individual or common storage facilities Sp. The processors are nominated to handle task initiation in alternate processing cycles. At the beginning of each processing cycle instructions from one processor are read out to register S while the other processor takes the task data from register E. In an immediately subsequent time slot of the cycle the one processor takes the exchange task data from E while the other processor is read out to S. Each processor sorts through the task data from E to find its own work and, if so nominated, to take on new work.