Handheld computer which establishes an input device as master over the CPU when it is coupled to the system
First Claim
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1. A mobile client computer comprising:
- a housing sized to be held and manipulated by the hand of a user;
memory mounted within said housing and storing digital data;
a central processing unit mounted within said housing and coupled to said memory;
an input/output controller mounted within said housing and coupled to said central processing unit;
a serial port coupled to said input/output controller and defining a general purpose serial interface; and
a display mounted in said housing and coupled to said central processing unit and said memory and displaying information derived from digital data processed by said central processing unit;
said serial port and said input/output controller and said central processing unit cooperating in (1) detecting the presence of a digital data generating user input device if connected to said serial port and (2) establishing a detected user input device as a master governing functioning of said central processing unit and (3) translating in said input/output controller digital data received through said serial port from a detected user input device.
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Abstract
A computer system, and particularly a handheld mobile client system, in which a user input device such as a keyboard or a scanner, coupled by a tethering conductor or a wireless link such as an infrared radiation link, functions as a master while the central processing unit of the system functions as a slave in receiving input digital signals.
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Citations
20 Claims
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1. A mobile client computer comprising:
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a housing sized to be held and manipulated by the hand of a user; memory mounted within said housing and storing digital data; a central processing unit mounted within said housing and coupled to said memory; an input/output controller mounted within said housing and coupled to said central processing unit; a serial port coupled to said input/output controller and defining a general purpose serial interface; and a display mounted in said housing and coupled to said central processing unit and said memory and displaying information derived from digital data processed by said central processing unit; said serial port and said input/output controller and said central processing unit cooperating in (1) detecting the presence of a digital data generating user input device if connected to said serial port and (2) establishing a detected user input device as a master governing functioning of said central processing unit and (3) translating in said input/output controller digital data received through said serial port from a detected user input device. - View Dependent Claims (2, 3, 4)
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5. A mobile client computer comprising:
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a housing sized to be held and manipulated by the hand of a user; memory mounted within said housing and storing digital data; a central processing unit mounted within said housing and coupled to said memory; a input/output controller mounted within said housing and coupled to said central processing unit; a serial port coupled to said input/output controller and defining a general purpose serial interface; a user input device coupled to said serial port and delivering therethrough digital signals identifying inputs to the computer system; and a display mounted in said housing and coupled to said central processing unit and said memory and displaying information derived from digital data processed by said central processing unit; said user input device and said serial port and said input/output controller and said central processing unit cooperating in (1) detecting the identification of said user input device and (2) establishing said user input device as a master governing functioning of said central processing unit and (3) translating in said input/output controller digital data received through said serial port from said user input device. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A computer system comprising:
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a housing; memory mounted within said housing and storing digital data; a central processing unit mounted within said housing and coupled to said memory; a input/output controller mounted within said housing and coupled to said central processing unit; and a serial port coupled to said input/output controller and defining a general purpose serial interface; said serial port and said input/output controller and said central processing unit cooperating in (1) detecting the presence of a digital data generating user input device if connected to said serial port and (2) establishing a detected user input device as a master governing functioning of said central processing unit and (3) translating in said input/output controller digital data received through said serial port from a detected user input device. - View Dependent Claims (12, 13, 14)
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15. A computer system comprising:
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a housing; memory mounted within said housing and storing digital data; a central processing unit mounted within said housing and coupled to said memory; a input/output controller mounted within said housing and coupled to said central processing unit; a serial port coupled to said input/output controller and defining a general purpose serial interface; and a user input device coupled to said serial port and delivering therethrough digital signals identifying inputs to the computer system; said user input device and said serial port and said input/output controller and said central processing unit cooperating in (1) detecting the identification of said user input device and (2) establishing said user input device as a master governing functioning of said central processing unit and (3) translating in said input/output controller digital data received through said serial port from said user input device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification