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公开(公告)号：MX157248A
公开(公告)日：1988-11-08
申请号：MX20130984
申请日：1984-05-10
Applicant: IBM
Inventor： KUMMER DAVID ALLEN , SAENZ JESUS ANDRES , TRYNOSKY STEPHEN WAYNE
IPC: G09G5/00 , G06F3/00 , G06F3/14 , G06F7/02 , G06T7/00 , G09G1/16 , G09G5/02 , G09G5/393 , G09G5/395 , G11C11/067
Abstract: In a bit mapped raster scan digital display system, a number of maps (MAPO-MAP3), each contain a single component of the display data and are read together to provide sets of bytes, each set representing eight pel defining groups. A compare system is provided for determining when a pel group in a set of bytes compares with a reference pel defining group. For the, or each, pair of maps, the compare system compares each bit of the two bytes of data with the correspondingly positioned bit of the reference group to provide outputs when a corresponding bit in each of the bytes compares with the two reference bits. When more than two maps are employed the compare outputs related to all of the pairs of maps are combined to provide an output signal when a pel group in a byte from the maps compares with the reference bits. In a modification of the system, the comparison can be made between one or more of the maps and the corresponding bit or bits of the compare data.
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公开(公告)号：GB2196212A
公开(公告)日：1988-04-20
申请号：GB8720940
申请日：1987-09-05
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store (10, 11, 12, 13), serialised (21, 22, 23, 24), modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition. In the first mode, groups of data bits are clocked through first (32) and second (33) and third (54) gates at the first frequency, and in the second mode the combined (35) output of the first and second gates (32 and 33) is, clocked through the third gate (54) at the even sub harmonic frequency.
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公开(公告)号：FR2605131A1
公开(公告)日：1988-04-15
申请号：FR8713336
申请日：1987-09-21
Applicant: IBM
Abstract: A frame scanning graphic display system in which all the points can be addressed according to two operating modes. In the first mode, data are extracted from a revision memory M0 to M3, serialised, modified and applied to a display device at a first frequency. In the second mode, the data are extracted from the revision memory, serialised and partially modified at the said first frequency and are then further modified and transferred to the display device at an even sub-harmonic, for example a half, of the first frequency. The additional modification comprises the chaining of successive groups of display data bits. Consequently, when the frame scanning device operates at a constant scanning speed, the first mode provides high definition for the image elements but a relatively low colour definition display and the second mode provides a display with an even sub-multiple, for example half, of the definition of the image elements but with a considerably higher colour definition.
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公开(公告)号：AU3137484A
公开(公告)日：1985-02-21
申请号：AU3137484
申请日：1984-08-01
Applicant: IBM
Inventor： KUMMER DAVID ALLEN , SAENZ JESUS ANDRES , TRYNOSKY STEPHEN WAYNE
Abstract: In a raster scan digital display system, a display image is stored, as coded characters or a bit map, which is larger than the display image. In order to define an image, within the stored image, for display, the addressing system for the memory (or memories) storing the image include a display image defining circuit. This circuit includes an address counter which is incremented to define successive addresses of data in a line of the displayed image, or row of characters therein. The circuit includes a first register to receive the initial address of a display image and a second register to receive a value indicating the width of the stored image. For the initial line (or character row) of a displayed image, the address counter is loaded from the first register and incremented from the initial address. For each subsequent line (or character row) the address from which the counter is incremented is the sum of the initial address of the previous line (or character row) and the value in the second register.
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公开(公告)号：IN177672B
公开(公告)日：1997-02-15
申请号：IN110DE1988
申请日：1988-02-09
Applicant: IBM
Inventor： MOREL JEANNE ELLEN , RACKLEY DARWIN PRESTON , TRYNOSKY STEPHEN WAYNE , WALL WILLIAM ALLIAN
IPC: G09F9/33
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Patent Agency Ranking
公开(公告)号：DE3779554T2
公开(公告)日：1993-01-28
申请号：DE3779554
申请日：1987-09-08
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialised, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition.
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公开(公告)号：AT76993T
公开(公告)日：1992-06-15
申请号：AT87113100
申请日：1987-09-08
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialised, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition.
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公开(公告)号：AT74224T
公开(公告)日：1992-04-15
申请号：AT87118541
申请日：1987-12-15
Applicant: IBM
Inventor： TRYNOSKY STEPHEN WAYNE , PARSONS DONALD HOLCOMBE JR
Abstract: A raster scan display system uses a RAM character generator and a dual port video buffer random access memory. The dual port buffer has a shift register output for holding a row of data from the random access memory. The buffer has two partitions, one containing, at consecutive locations, character data and attribute data, the other, character data and font data. In a first mode of operation using the first partition, data transferred to the shift register comprises character data to address the character generator store and attribute data for combination with font data retrieved from the character generator store to provide video data. In a second mode, using the second partition, character and font data transferred to the shift register is used to address and update the character generator store.
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公开(公告)号：HK11692A
公开(公告)日：1992-02-21
申请号：HK11692
申请日：1992-02-13
Applicant: IBM
Inventor： TRYNOSKY STEPHEN WAYNE , PARSONS DONALD HOLCOMBE JR
Abstract: A raster scan display system uses a RAM character generator and a dual port video buffer random access memory. The dual port buffer has a shift register output for holding a row of data from the random access memory. The buffer has two partitions, one containing, at consecutive locations, character data and attribute data, the other, character data and font data. In a first mode of operation using the first partition, data transferred to the shift register comprises character data to address the character generator store and attribute data for combination with font data retrieved from the character generator store to provide video data. In a second mode, using the second partition, character and font data transferred to the shift register is used to address and update the character generator store.
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公开(公告)号：HK54790A
公开(公告)日：1990-07-27
申请号：HK54790
申请日：1990-07-19
Applicant: IBM
Inventor： KUMMER DAVID ALLEN , SAENZ JESUS ANDRES , TRYNOSKY STEPHEN WAYNE
IPC: G09G5/00 , G06F3/00 , G06F3/14 , G06F7/02 , G06T7/00 , G09G1/16 , G09G5/02 , G09G5/393 , G09G5/395 , G06F15/70
Abstract: In a bit mapped raster scan digital display system, a number of maps (MAPO-MAP3), each contain a single component of the display data and are read together to provide sets of bytes, each set representing eight pel defining groups. A compare system is provided for determining when a pel group in a set of bytes compares with a reference pel defining group. For the, or each, pair of maps, the compare system compares each bit of the two bytes of data with the correspondingly positioned bit of the reference group to provide outputs when a corresponding bit in each of the bytes compares with the two reference bits. When more than two maps are employed the compare outputs related to all of the pairs of maps are combined to provide an output signal when a pel group in a byte from the maps compares with the reference bits. In a modification of the system, the comparison can be made between one or more of the maps and the corresponding bit or bits of the compare data.
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