Loop control system for digital processing apparatus

Details Loop control system for digital processing apparatus Loop control system for digital processing apparatus

G - Physics

06

F

354/231, 328/0.5

G06F 1/04 (2006.01) G06F 9/30 (2006.01) G06F 9/32 (2006.01)

Patent

CA 1223666

-12- LOOP CONTROL SYSTEM FOR DIGITAL PROCESSING APPARATUS ABSTRACT A loop control system for digital processing apparatus. A dedicated storage register and associated counting register are provided for receiving a starting value representing a number of passes through a program loop. An iteration circuit is provided for receiving the value in the counting register, iterating it, and storing the new value in the same counting register with each successive pass through the loop. A detector is provided for comparing the output of the iteration circuit to a predetermined value and providing a com- pletion signal when the new value and the ending value have a predetermined relative relationship. Control logic is provided for causing the value in the storage register to be transferred into the counting register upon the occurrence of an output signal from the detec- tor circuit. A plurality of pairs of storage and counting registers may be provided for keeping track of the number of iterations of nested loops.

476419

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