STORED-PROGRAM CONTROL MACHINE

摘要

The hierarchical orgainzation of programmable logic arrays permits the control of microporcessor functions to be achieved in a way which allows otherwise wasted clock time to be used. The mostly independent operations of the several PLS's is organized by "handshake" signals from the latches of one PLA to those of another via AND circuits operative to selectively enable clock signals, in some instances, and data in other instances, to be applied to the latches. The use of the AND circuits enables requisite operations to be achieved with relatively small PLA's.