System for selectively communicating information between process

Details System for selectively communicating information between process System for selectively communicating information between process

1994-06-09

1996-06-25

Lee, Thomas C.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3408255, 364234, 3642344, 3642382, 364DIG2, 36470901, 395838, G06F 1502

Patent

active

055308937

ABSTRACT:
A data processing system having a built-in keyboard and an external input device which are alternately activated. If there is no command from the external keyboard (106), the external keyboard is invalidated (108). If there is a command from the built-in keyboard, it is transmitted to the CPU (110-114). If there is a command from the external keyboard (106) and the command is RESEND a previous command is transmitted to the CPU. If the command is not RESEND, the command from the external keyboard is transmitted to the CPU.

REFERENCES:
patent: 4872004 (1989-10-01), Bahnick et al.
patent: 4959774 (1990-09-01), Davis
patent: 5111424 (1992-05-01), Donaldson et al.
patent: 5136694 (1992-08-01), Belt et al.
Martin Reiffin "A Real-Time Compiler System" Microcomputing, Jul. 1983, pp. 52-63.

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