Arrangement of detecting current revision levels of a plurality

Details Arrangement of detecting current revision levels of a plurality Arrangement of detecting current revision levels of a plurality

1992-09-09

1995-08-29

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

364550, H04Q 100

Patent

active

054464544

ABSTRACT:
In order to ascertain the current revision levels of a plurality of plug-in boards which have been inserted into a digital data processing system, a plurality of number generators are respectively mounted on the plug-in boards. Each of the number generators retains the current revision level of the corresponding plug-in board, and produces current revision level data. A display is operatively coupled to the number generators and receives the revision level data therefrom and exhibits the current revision levels of the plug-in boards. Further, each of the revision levels is checked to see if it is confined within a range of revision levels which are available for the data processing system. The check results are also exhibited on the display. Still further, in the event that: (a) a given revision level is detected outside the revision level range and (b) the plug-in board is found dispensable, the board is logically disconnected from the data processing system. In this case, the system starts operations while the board is physically inserted into the system but logically disconnected therefrom.

REFERENCES:
patent: 4799635 (1989-01-01), Nakagawa
patent: 5134391 (1992-07-01), Okada
patent: 5239485 (1993-08-01), Ohba
"Understanding Data Communication". Friend, George et al. 1984 pp. 2-18.

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