2.
    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.

    3.
    发明专利
    未知

    公开(公告)号:DE3689280D1

    公开(公告)日:1993-12-16

    申请号:DE3689280

    申请日:1986-08-26

    Applicant: IBM

    Abstract: A method for improving the viewing quality of a CRT display image without increasing resolution of the display. With the invention disclosed herein, characters are apparently positioned at sub-pixel locations to improve the viewing quality of a CRT display image. This apparent positioning is accomplished by changing intensity values assigned to pixels on a CRT display. In the preferred embodiment, the change in intensity values is effected by linear interpolation with intensity values of neighbouring pixels to yield second intensity values. These second intensity values, then, improve the viewing quality of the CRT display image.

    4.
    发明专利
    未知

    公开(公告)号:DE69016697T2

    公开(公告)日:1995-08-10

    申请号:DE69016697

    申请日:1990-04-23

    Applicant: IBM

    Abstract: A video random access memory includes an implementation of a serial access memory register that facilitates the selecting from two alternate frame buffers on a per pixel basis, wherein the frame buffers are each stored in a portion of a row in a single video RAM, data from each of the two frame buffers is available following data transfer to the serial access memory register, a double buffer select signal controls the selection of which half of the serial access memory register will put data on the output bus for each serial clock signal, and the serial clock increments the address pointers in both halves of the serial access memory port simultaneously.

    6.
    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.

    VIRTUAL DISPLAY ADAPTER
    7.
    发明专利

    公开(公告)号:CA1313415C

    公开(公告)日:1993-02-02

    申请号:CA589106

    申请日:1989-01-25

    Applicant: IBM

    Abstract: Y0988-006 A display control means such as a virtual display adapter 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. This large area of memory includes system memory, 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.

    10.
    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.

Patent Agency Ranking