G - Physics – 06 – F
Patent
G - Physics
06
F
323/1, 340/84, 3
G06F 13/12 (2006.01) G06F 15/17 (2006.01)
Patent
CA 1102425
CIRCUITS AND METHODS FOR MULTIPLE CONTROL IN DATA PROCESSING SYSTEMS Abstract of the Disclosure In a data processing system in which two or more asynchronous processors operating as masters interchange requests and responses with a control unit that in turn controls a number of peripheral devices and operates as a slave to the processors, repetitive requests from a high speed processor can give rise to an impasse condition in which the control unit is blocked from completing the pre- viously initiated sequence between a peripheral device and another processor. In accordance with the invention, the interface between the processors and the peripheral devices incorporates means which detect an uninterrupted sequence, of predetermined length, of busy responses from the control unit. If such responses are not interrupted by other actions, the system temporarily exercises independent con- trol, returning a busy signal to the processors while en- abling the control unit to ascertain whether reconnection to a specific processor is needed as the next step in a pre- viously initiated processor program. If so, the control unit is enabled within the predetermined interval to effect the reconnection, either within the allotted time or on a succeeding repetition of the cycle. The exercise of a limited initiative for a predetermined time interval does not alter the basic master-slave relationship or unduly delay data transfer operations.
320694
International Business Machines Corporation
Na
LandOfFree
Circuits and methods for multiple control data processing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuits and methods for multiple control data processing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuits and methods for multiple control data processing... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-113318