US3911404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage and processing apparatus including processing of new line characters
Assignee: Dyncorp Information Systems LLC
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Filing: 1974-09-03
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Granted: 1975-10-07
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Expires: 1994-09-03
Abstract
Abstract Data storage and processing apparatus for storing and processing data for use by a video display monitor. The data storage and processing apparatus includes a random access memory having a general storage section arranged to store data including display character data to be displayed in horizontal display lines on the display surface of a video display monitor and control data for use in conserving storage space in the random access memory. The memory conservation control data contained in the general storage section of the random access memory includes coded new line characters each of which represents the beginning of a new display line of the video display monitor. Each new line character is preceded in the random access memory by display data for the preceding display line of the video display monitor and followed by display data from the new display line. Each coded new line character is received and decoded by decoding circuitry coupled to an output of the random access memory. For each decoding of a coded new line character, the memory is inhibited from any further readout of data characters and coded space characters are caused to be established repeatedly and continuously in an output buffer circuit until such time as the end of a display line is reached, and a new line begins. By use of the coded new line character and its processing in accordance with the present invention, the need for using several space characters in the memory to fill out a given line of characters to the maximum possible length (e.g., 80 characters) is avoided.
Inventors
- 👤 Jr Joseph L O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:35
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/048; G06F3/0487; G06F3/0489; G09; G09G; G09G1/00; G09G5/00; G09G5/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
410 words
Data storage and processing apparatus for storing and processing data for use by a display device, said display device displaying coded data characters in a plurality of display lines, said data storage and processing apparatus comprising: storage means having an output and arranged to store in successive storage locations therein coded data characters including coded new line characters, each of said coded new line characters representing the beginning of a display line of the display device and being preceded in the storage means by coded data characters for the previous display line and followed in the storage means by coded data characters for the next display line; readout means operative to cause coded data characters stored in the storage means to be read out therefrom in succession and to be applied in succession to the output of the storage means; new line command means operative to produce new line command signals in succession, each of the new line command signals occurring at the beginning of a display line of the display device; first means coupled to the readout means and to the output of the storage means and having an input for receiving each new line command signal produced by the new line command means and further having an output, said first means being operative to detect each coded new line character applied to the output of the storage means and in response thereto to inhibit the readout means from causing the further readout of coded data characters from the storage means and operative to cause a special coded data character to be produced at its output; receiving means operative to receive each special coded data character produced by the first means and having an output; and second means operative to cause each special coded data character received by the receiving means to be applied repeatedly to its output until the termination of the special coded data character at the output of the first means; said first means being operative after each special coded data character has been produced at the output thereof and in response to the next new line command signal produced by the new line command means to terminate the special coded data character at its output, whereby the special coded data character is no longer received by the receiving means and applied to its output, and further operative to enable the readout means to permit the readout from the storage means of additional coded data characters.
Claim 2
Dependent Claim
410 words
Data storage and processing apparatus for storing and processing data for use by a display device, said display device displaying coded data characters in a plurality of display lines, said data storage and processing apparatus comprising: storage means having an output and arranged to store in successive storage locations therein coded data characters including coded new line characters, each of said coded new line characters representing the beginning of a display line of the display device and being preceded in the storage means by coded data characters for the previous display line and followed in the storage means by coded data characters for the next display line; readout means operative to cause coded data characters stored in the storage means to be read out therefrom in succession and to be applied in succession to the output of the storage means; new line command means operative to produce new line command signals in succession, each of the new line command signals occurring at the beginning of a display line of the display device; first means coupled to the readout means and to the output of the storage means and having an input for receiving each new line command signal produced by the new line command means and further having an output, said first means being operative to detect each coded new line character applied to the output of the storage means and in response thereto to inhibit the readout means from causing the further readout of coded data characters from the storage means and operative to cause a special coded data character to be produced at its output; receiving means operative to receive each special coded data character produced by the first means and having an output; and second means operative to cause each special coded data character received by the receiving means to be applied repeatedly to its output until the termination of the special coded data character at the output of the first means; said first means being operative after each special coded data character has been produced at the output thereof and in response to the next new line command signal produced by the new line command means to terminate the special coded data character at its output, whereby the special coded data character is no longer received by the receiving means and applied to its output, and further operative to enable the readout means to permit the readout from the storage means of additional coded data characters.
Claim 3
Dependent Claim
41 words
Data storage and processing apparatus in accordance with claim 1 wherein: the first means is operative in response to detecting each coded new line character at the output of the storage means to produce a coded spAce character at its output.
Claim 4
Dependent Claim
327 words
Data storage and processing apparatus in accordance with claim 1 wherein: the first means comprises: new line decoding circuit means coupled to the output of the storage means for decoding each coded new line character applied to the output of the storage means and operative in response thereto to produce an output signal; first circuit means coupled to the readout means and to the new line decoding circuit means and having a new line command input for receiving each new line command signal produced by the new line command means and further having an output, said first circuit means being operative to receive each output signal produced by the new line decoding circuit means and in response thereto and in the absence of a new line command signal at its new line command input to produce an output signal at its output; said readout means receiving each output signal produced at the output of the first circuit means and operative in response thereto to be inhibited from causing the further readout of coded data characters from the storage means; and said first means further comprises: second circuit means coupled to the output of the first circuit means for receiving each output signal produced by the first circuit means and having an output, said second means being operative in response to each output signal received thereby from the first circuit means to produce a special coded data character at its output; and said first circuit means being operative in response to the next new line command signal received at its new line command input following the production of the special coded data character at the output of the second circuit means to terminate the output signal at its output, whereby the readout means is enabled to permit the readout from the storage means of additional coded data characters and whereby the special coded data character at the output of the second circuit means is caused to be terminated.
Claim 5
Dependent Claim
117 words
Data storage and processing apparatus in accordance with claim 3 wherein the second circuit means comprises: gate means coupled to the output of the first circuit means and having an output, said gate means being operative in response to each output signal produced by the first circuit means to produce a control signal at its output; and third circuit means coupled to the output of the gate means and having a control input for receiving each control signal produced at the output of the gate means and having an output, said third circuit means being operative in response to each control signal produced by the gate means to produce a special coded data character at its output.
Claim 6
Dependent Claim
130 words
Data storage and processing apparatus in accordance with claim 4 wherein: the third circuit means is further coupled to the output of the storage means and is operative in the absence of a control signal at its control input to couple coded data characters applied to the output of the storage means to its output; and the receiving means comprises: output buffer circuit means coupled to the output of the third circuit means and having an output, said output buffer circuit means being operative to receive and store in succession coded data characters applied to the output of the storage means and coupled by the third circuit means to its output and to receive and store the special coded data characters produced by the third circuit means at its output.
Claim 7
Dependent Claim
41 words
Data storage and processing apparatus in accordance with claim 5 wherein: the third circuit means is operative in response to each control signal received at its control input from the gate means to produce a space data character at its output.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |