04064561 is referenced by 17 patents and cites 6 patents.

Hardware duplication at each of a plurality of CRT key stations is minimized and centralized control is maintained by performing many traditional CRT key station operations under software control by a central processing unit. Simplified CRT key stations include circuitry providing automatic key stroke repeat for continuously actuated keys only after receipt of a repeat enable signal from the central processing unit for each separate repeat and a tone generator responsive to commands from the central processing unit. The tone generator includes a key click circuit to audibly indicate each completion of a key activation. CRT key station circuitry inserts a configuration code with each key stroke data word which indicates one of a plurality of available key switch arrangements for the CRT key station. The configuration code permits a single key station hardware design to be included in a data entry system with different keyboard configurations such as typewriter, calculator, keypunch or even foreign language to be selected without need for a conversion system at each CRT key station to convert key stroke information to a common code. Instead, a central processing unit may utilize the configuration code to identify an appropriate conversion table stored in memory.

Title
CRT key station which is responsive to centralized control
Application Number
532714
Publication Number
4064561
Application Date
November 26, 1976
Publication Date
December 20, 1977
Inventor
Alan K Jennings
Huntington Beach
CA, US
Agent
Fraser and Bogucki
Assignee
Pertec Computer Corporation
CA, US
IPC
G06F 3/14
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