General purpose keyboard for central processing unit with microprocessor and use of this keyboard with a microcomputer
First Claim
1. A multi-purpose keyboard assembly for a central processing unit with a microprocessor (9) comprising:
- a housing having at least one set (300) of variable allocation keys, a booklet (2) removably fixed on the housing, said booklet comprising at least two pages (30), (21) indicating the allocation of the keys;
a first remote means of detection comprising light emitting cells (E0,E1) and photoelectric receivers (R0,R1) mounted on the housing for detecting the position of the pages (20), (21) of the booklet (2);
a means for providing codes to the central processing unit (9) in response to the detection of the position of the pages (20), (21) of the booklet (2) and in response to the actuation of a key (32) of the keyboard belonging to the one set (300) of keys, said means for providing codes comprising a scanning keyboard interface (45), (46), a keyboard processing unit (40) a data bus (401) and a programmable read only memory (431);
said scanning keyboard interface (45) being connected through the data bus (401) to the processing unit (40);
the programmable read only memory (43) containing tables (T1,T4) corresponding to the keys and the codes to be provided to the central processing unit (9) according to the position of the pages (20), (21) of the booklet detected by the first remote means.
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Accused Products
Abstract
A general purpose keyboard for a central processing unit with microprocessor 9, characterized in that it includes at least one set 300 of variable allocation keys, a removable booklet 2 comprising at least two pages 20, 21 specifying allocation of the keys, photoelectric receiver R0, R1 for detecting the position of the pages 20, 21 of the booklet 2 and a keyboard processing unit 40 for supplying, in response to the detection of the position of the pages 20, 21 of the booklet 2 and to the activation of a key 32 of the keyboard belonging to the central processing unit or set 300, a different ASCII code according to the position of the pages of the booklet 2.
51 Citations
11 Claims
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1. A multi-purpose keyboard assembly for a central processing unit with a microprocessor (9) comprising:
- a housing having at least one set (300) of variable allocation keys, a booklet (2) removably fixed on the housing, said booklet comprising at least two pages (30), (21) indicating the allocation of the keys;
a first remote means of detection comprising light emitting cells (E0,E1) and photoelectric receivers (R0,R1) mounted on the housing for detecting the position of the pages (20), (21) of the booklet (2);
a means for providing codes to the central processing unit (9) in response to the detection of the position of the pages (20), (21) of the booklet (2) and in response to the actuation of a key (32) of the keyboard belonging to the one set (300) of keys, said means for providing codes comprising a scanning keyboard interface (45), (46), a keyboard processing unit (40) a data bus (401) and a programmable read only memory (431);
said scanning keyboard interface (45) being connected through the data bus (401) to the processing unit (40);
the programmable read only memory (43) containing tables (T1,T4) corresponding to the keys and the codes to be provided to the central processing unit (9) according to the position of the pages (20), (21) of the booklet detected by the first remote means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a housing having at least one set (300) of variable allocation keys, a booklet (2) removably fixed on the housing, said booklet comprising at least two pages (30), (21) indicating the allocation of the keys;
Specification