Browse Prior Art Database

Periodic Keyboard Communications Wrap

IP.com Disclosure Number: IPCOM000060756D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Fredericksen, JK: AUTHOR [+3]

Abstract

Realtime, concurrent testing in the workstation, is increased by using protocol commands to continually monitor and test the keyboard communications link. Use of serial interface 20, in the drawing, has required the creation of a new protocol. This protocol is used by the workstation to communicate with the keyboard 10. A part of this protocol is the "Echo" command which is used to wrap the drivers/receivers of the keyboard and the workstation keyboard interface. Although this command can be used at any time, it has traditionally been used only during 'bring up diagnostics'. During a large percentage of a workstation's powered on hours, the keyboard is typically not used.

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Periodic Keyboard Communications Wrap

Realtime, concurrent testing in the workstation, is increased by using protocol commands to continually monitor and test the keyboard communications link. Use of serial interface 20, in the drawing, has required the creation of a new protocol. This protocol is used by the workstation to communicate with the keyboard 10. A part of this protocol is the "Echo" command which is used to wrap the drivers/receivers of the keyboard and the workstation keyboard interface. Although this command can be used at any time, it has traditionally been used only during 'bring up diagnostics'. During a large percentage of a workstation's powered on hours, the keyboard is typically not used. In the past, if akeyboard malfunction occurred during an idle period, the error would either not be detected or would not be reported to the operator in a timely fashion. To eliminate these problems, the 'Echo' command is periodically sent (typically once a second) to the keyboard whenever the keyboard is idle. The workstation can determine if the keyboard is working properly by analyzing the response given to the 'Echo' command. When an error is detected, it is immediately logged and the workstation operator is notified. Because the 'Echo' command is sent only when the keyboard is idle, keyboard and workstation performance is not degraded.

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