Circuit to enable foreground and background processing in a...

Details Circuit to enable foreground and background processing in a... Circuit to enable foreground and background processing in a...

G - Physics

06

F

354/236.5, 354/2

G06F 3/14 (2006.01) G06F 9/46 (2006.01) G06F 9/48 (2006.01) G06F 17/24 (2006.01)

Patent

CA 1164577

ABSTRACT A control system is provided in a word processing apparatus to enable both foreground and background processing. A controlled circuit for controlling the operation of a storage means, a data processing means for performing data processing operations, and a second controlled circuit means coupled to a keyboard for controlling the transfer of information to and from the keyboard are each operatively connected to a data bus. The data bus enables communications among the units. The keyboard is provided with indicator means adapted to be actuated by a signal generated in the data processing means to indicate a predetermined condition in the data processing means. The keyboard may further be provided with a switch actuable to be in a first condition such that the keyboard is conditioned for data entry for a background processing mode and a second condition such that the keyboard is conditioned for data entry in a foreground mode of operation.

383502

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