1.
    发明专利
    未知

    公开(公告)号:AT110873T

    公开(公告)日:1994-09-15

    申请号:AT89106573

    申请日:1989-04-13

    Applicant: IBM

    Abstract: A display control means such as a virtual display adapter (110) allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory (120). This large area of memory includes system memory (130), and efficient access to this large area of memory is permitted for normal system use. The display controller also functions with non-contiguous and non-resident bitmaps. The flexibility of demand-paged virtual memory is utilized for display tasks, as display bitmaps may be written to the large area of memory as well as the display memory.

    3.
    发明专利
    未知

    公开(公告)号:DE68917771D1

    公开(公告)日:1994-10-06

    申请号:DE68917771

    申请日:1989-04-13

    Applicant: IBM

    Abstract: A display control means such as a virtual display adapter (110) allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory (120). This large area of memory includes system memory (130), and efficient access to this large area of memory is permitted for normal system use. The display controller also functions with non-contiguous and non-resident bitmaps. The flexibility of demand-paged virtual memory is utilized for display tasks, as display bitmaps may be written to the large area of memory as well as the display memory.

    7.
    发明专利
    未知

    公开(公告)号:DE68917771T2

    公开(公告)日:1995-03-30

    申请号:DE68917771

    申请日:1989-04-13

    Applicant: IBM

    Abstract: A display control means such as a virtual display adapter (110) allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory (120). This large area of memory includes system memory (130), and efficient access to this large area of memory is permitted for normal system use. The display controller also functions with non-contiguous and non-resident bitmaps. The flexibility of demand-paged virtual memory is utilized for display tasks, as display bitmaps may be written to the large area of memory as well as the display memory.

    9.
    发明专利
    未知

    公开(公告)号:DE68915232T2

    公开(公告)日:1994-11-10

    申请号:DE68915232

    申请日:1989-09-02

    Applicant: IBM

    Abstract: A color display device which includes dither apparatus for each primary color to be displayed. A dither matrix provides a dither signal output as a function of the position of a pixel on the color display device. An input primary color signal includes an integer signal and a fraction signal. The integer signal is incremented by an incrementer. There is means for providing an output primary color signal which is the incremented signal whenever a predetermined relationship exists between the dither signal and the fraction signal, and which is the integer signal whenever the predetermined relationship does not exist.

    10.
    发明专利
    未知

    公开(公告)号:DE68915232D1

    公开(公告)日:1994-06-16

    申请号:DE68915232

    申请日:1989-09-02

    Applicant: IBM

    Abstract: A color display device which includes dither apparatus for each primary color to be displayed. A dither matrix provides a dither signal output as a function of the position of a pixel on the color display device. An input primary color signal includes an integer signal and a fraction signal. The integer signal is incremented by an incrementer. There is means for providing an output primary color signal which is the incremented signal whenever a predetermined relationship exists between the dither signal and the fraction signal, and which is the integer signal whenever the predetermined relationship does not exist.

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