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US4609908A Expired / Lapsed US ⏱️ 0.0 years remaining

Repeat control apparatus for a polling type serial interface keyboard apparatus

Assignee: Toshiba Corp
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Filing: 1983-09-08
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Granted: 1986-09-02
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Expires: 2003-09-08
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Abstract

Abstract A repeat control apparatus for a serial keyboard interface apparatus has a one-chip microprocessor which serves as a keyboard controller. A RAM section in the microprocessor includes an area for holding a set value RCD A for repeat start timing control, an area for holding a set value RCD B for repeat time interval control, a counter area for permitting RCD A to be set as a preset value and for making a sequential down count according to the number of pollings from a terminal main unit, and a counter area for permitting RCD B to be set as a preset value and for making a sequential down count according to the number of pollings from the terminal main unit. The terminal main unit performs the polling operation with respect to a keyboard controller. The number of pollings is counted on the side of the keyboard controller, after the key operation has been performed. When the count value reaches a value initially set from the terminal main unit, a repeat operation is executed. A specific code is added to a key code input from a repeat function-equipped key, through the keyboard controller, which code shows that the key code is a repeat key code. The terminal main unit performs a key input control function with respect to a key code which permits a repeat key operation; and with respect to a key code which does not permit such repeat key operation.

Inventors

  • 👤 Katsumi Amano

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 01:30
CPC Classifications
H; H03; H03M; H03M11/00; H03M11/02; G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/0227

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 194 words
A repeat control apparatus for a keyboard apparatus, which is adapted to cause a key code input by a key operation to be sent in a bit serial mode from the keyboard apparatus to a host unit, which repeat control apparatus comprises: first holding means for holding a first value for repeat start time control, which is set with a polling time interval from the host unit, as a unit; second holding means for holding a second value for repeat time interval control, which is set with the polling time interval from the host unit, as a unit; count means, coupled to the first and second holding means, for permitting the contents of the first and second holding means to be set at different times and for making a count up to a predetermined number, on the basis of a polling signal from the host unit; and means, coupled to the count means, for sending said key code to the host unit when the count means makes a count up to a repeat start time stored in the first holding means or over a predetermined repeat time interval stored in the second holding means.
Claim 2
Dependent Claim 194 words
A repeat control apparatus for a keyboard apparatus, which is adapted to cause a key code input by a key operation to be sent in a bit serial mode from the keyboard apparatus to a host unit, which repeat control apparatus comprises: first holding means for holding a first value for repeat start time control, which is set with a polling time interval from the host unit, as a unit; second holding means for holding a second value for repeat time interval control, which is set with the polling time interval from the host unit, as a unit; count means, coupled to the first and second holding means, for permitting the contents of the first and second holding means to be set at different times and for making a count up to a predetermined number, on the basis of a polling signal from the host unit; and means, coupled to the count means, for sending said key code to the host unit when the count means makes a count up to a repeat start time stored in the first holding means or over a predetermined repeat time interval stored in the second holding means.
Claim 3
Dependent Claim 22 words
A repeat control apparatus of claim 1, wherein said first and second set values can be arbitrarily set by the host unit.
Claim 4
Dependent Claim 59 words
A repeat control apparatus according to claim 1, further comprising means for generating a specific code showing that said code is a repeat key code; and, wherein, when a count value of said count means reaches a set value corresponding to the repeat time interval, the key code repeated and the specific code are sent to the host unit.
Claim 5
Dependent Claim 50 words
A repeat control apparatus according to claim 1, wherein said means for sending the key code corresponding to the operated key to the host unit when the count means makes a count up to the repeat start time or over the predetermined repeat time interval is comprised of a microcomputer.

References Cited (Backward Citations)

US4200926A Cited
US3755691A Cited
FR2332655A1 Cited
US4305065A Cited
GB2057171A Cited
US4263582A Cited
US4346369A Cited
US4408191A Cited
US4323888A Cited
US4482955A Cited
US4502039A Cited
US4470038A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-09-01 1990-03-03 1990-09-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-09-01 1994-03-03 1994-09-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-09-01 1998-03-03 1998-09-02 $7700.00 Window Closed / Lapsed

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