Status change monitoring apparatus

Details Status change monitoring apparatus Status change monitoring apparatus

1992-06-24

1994-06-07

Black, Thomas G.

Boots, shoes, and leggings

34082515, G06F 1500, G06F 1546

Patent

active

053195744

ABSTRACT:
A status change monitoring apparatus monitors an apparatus to be monitored to indicate a monitoring result. The monitoring apparatus comprises a new data latching unit for latching new data, an old data latching unit for latching old data received before the reception of the new data, a comparing and storing unit for comparing the new data and the old data and for storing a comparison result, and a processing unit for checking the comparison result to determine whether there is a difference between the old data and the new data. The processing unit processes the new data to indicate the monitoring result only when there is a difference between the old data and the new data, thereby shortening the processing time required for comparing.

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patent: 4797652 (1989-01-01), Hall
"Direct Memory Access" Interrupts, Direct Memory Access, and Processes, Ch. 11 pp. 340-344, Date Unknown.

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