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US3757311A Expired / Lapsed US ⏱️ 0.0 years remaining

System for outputting lines about a point of operation

Assignee: International Business Machines Corp
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Filing: 1972-03-30
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Granted: 1973-09-04
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Expires: 1992-03-30
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Abstract

Abstract A system for obtaining a number of lines about an operating point for output purposes such as display. The system is comprised of an input/output (I/O) typewriter, an electronic dynamic shift register (DSR), an intermediate electronic dynamic shift register (IDSR), and a display controlled by format control logic and a frame buffer. The IDSR control logic controls codes input into the IDSR from the DSR data and control code memory. One of the control codes in the DSR data flow is an operation flag which defines the point of operation in the DSR. In order to obtain a number of lines surrounding the operation flag for output purposes, an IDSR of limited character capacity is used. The data and control codes making up the data flow in the DSR are transferred to the IDSR until sufficient text surrounding the operation flag is contained in the IDSR. Prior to output, excess data and control codes are removed from the IDSR data flow until only the data to be output remains in the IDSR. For example, if five lines are to be displayed with the operation flag positioned in the middle line, data is loaded into the IDSR until at least those five lines are obtained. Then the excess data and control codes are removed from the IDSR data flow. When exactly the data to be output remains, it is transferred to a display device.

Inventors

  • 👤 J Byram
  • 👤 J Toups

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 10:14
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F3/147; B; B41; B41B; B41B27/00; G11; G11C; G11C19/00

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 137 words
A system for obtaining a number of particular text lines about, and including, a line containing an operating point control code for output purposes, said system comprising: a. first means for storing text lines made up of data and control codes; b. a second means for accepting said data and control codes from said means and holding at least a portion of said data and control codes; c. means for selectively transferring said data and control codes from said first means to said second means; d. means for determining fRom all of said data and control codes held in said second means, said particular text lines held in said second means to be output; and e. means for removing data and control codes from said second means in excess of said particular text lines to be output.
Claim 2
Independent Claim 137 words
A system for obtaining a number of particular text lines about, and including, a line containing an operating point control code for output purposes, said system comprising: a. first means for storing text lines made up of data and control codes; b. a second means for accepting said data and control codes from said means and holding at least a portion of said data and control codes; c. means for selectively transferring said data and control codes from said first means to said second means; d. means for determining fRom all of said data and control codes held in said second means, said particular text lines held in said second means to be output; and e. means for removing data and control codes from said second means in excess of said particular text lines to be output.
Claim 3
Dependent Claim 28 words
A system according to claim 1 further including means for inputting line end control codes into said second means for compensating for an insufficient number of text lines.
Claim 4
Dependent Claim 33 words
A system according to claim 2 further including means for inputting a mark control code into said second means for distinguishing between old and new data and control codes in said second means.
Claim 5
Dependent Claim 19 words
A system according to claim 3 further including means for determining when said selective transfer is to be terminated.
Claim 6
Dependent Claim 25 words
A system according to claim 4 further including means for detecting said data and control codes input into an input stage of said second means.
Claim 7
Dependent Claim 25 words
A system according to claim 5 further including means for detecting said data and control codes output from an output stage of said second means.
Claim 8
Dependent Claim 35 words
A system according to claim 6 further including means for counting the total number of said text lines transferred into said input stage of said second means before said operating point control code is detected.
Claim 9
Dependent Claim 39 words
A system according to claim 7 further including means for counting, up to a determined number, the number of said text lines transferred into said input stage of said second means before said operating point control code is detected.
Claim 10
Dependent Claim 40 words
A system according to claim 8 further including means for counting, up to a determined number, the number of said text lines transferred into said input stage of said second means following the detecting of said operating point control code.
Claim 11
Dependent Claim 34 words
A system according to claim 9 further including means for decrementing the count of said total number of said text lines when text lines are detected at said output stage of said second means.
Claim 12
Dependent Claim 32 words
A system according to claim 10 further including means for inputting delete codes into said second means following said termination of said transfer until said first line to be output is detected.

References Cited (Backward Citations)

US3346853A Cited
US3501746A Cited
US3623005A Cited
US3631455A Cited
US3579196A Cited
US3581290A Cited
US3648245A Cited
US3685019A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-09-03 1977-03-05 1977-09-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-03 1981-03-05 1981-09-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-03 1985-03-05 1985-09-04 $7700.00 Window Closed / Lapsed

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