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公开(公告)号：DE3810232A1
公开(公告)日：1988-10-13
申请号：DE3810232
申请日：1988-03-25
Applicant: IBM
Inventor： TRYNOSKY STEPHEN WAYNE , PARSONS 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：AU7976387A
公开(公告)日：1988-04-21
申请号：AU7976387
申请日：1987-10-14
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：IN175294B
公开(公告)日：1995-06-03
申请号：IN181DE1988
申请日：1988-03-09
Applicant: IBM
Inventor： TRYNOSKY STEPHEN WAYNE , PARSONS DONALD HOLCOMBE
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：GB2196212B
公开(公告)日：1990-08-29
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, 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：DE3480965D1
公开(公告)日：1990-02-08
申请号：DE3480965
申请日：1984-07-05
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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Patent Agency Ranking
公开(公告)号：BE1001063A3
公开(公告)日：1989-06-27
申请号：BE8701162
申请日：1987-10-09
Applicant: IBM
Abstract: Système d'affichage graphique à balayage de trame dont tous les points peuvent etre adressés selon deux modes de fonctionnement; dans le premier mode, des données sont extraites d'une mémoire de révision (MO à M3), sérialisées, modifiées et appliquées à un dispositif d'affichage à une première fréquence; dans le second mode, les données sont extraites de la mémoire de révision, sérialisées et partiellement modifiées à ladite première fréquence et sont alors encore modifiées et transférées au dispositif d'affichage à une sous harmonique paire, par exemple la moitié, de la première fréquence.
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公开(公告)号：FR2613109A1
公开(公告)日：1988-09-30
申请号：FR8718513
申请日：1987-12-29
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：DE3779554D1
公开(公告)日：1992-07-09
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：AU600980B2
公开(公告)日：1990-08-30
申请号：AU7976387
申请日：1987-10-14
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：PH24302A
公开(公告)日：1990-05-29
申请号：PH35807
申请日：1987-09-11
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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