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    SYSTEM AND METHOD FOR NEUTRAL MONITORING FOR BUS CONTROL
    2.
    发明专利
    SYSTEM AND METHOD FOR NEUTRAL MONITORING FOR BUS CONTROL 失效

    公开(公告)号：JPH04227152A

    公开(公告)日：1992-08-17

    申请号：JP25296191

    申请日：1991-09-04

    Applicant: IBM

    Inventor： KAISER JOHN MICHAEL ,  ST CLAIR JOE CHRISTOPHER

    IPC: G06F15/163 ,  G06F13/14 ,  G06F13/38 ,  H04Q3/52

    Abstract: PURPOSE: To give a communication route between two devices among many devices by discriminating the occurrence of a change in communication channel and monitoring the communication between the devices for changing the communication channel in accordance with the occurrence of the change. CONSTITUTION: Each port (for example, 30) is connected to a port arbitration bus 50, a port control bus 52, and data transfer lines 54 and 55. Each port is also connected to a 16×16 matrix switch 40 through the data lines. The switch 40 forms cross point interconnection between ports. Each port performs photoelectric conversion so that information can be delivered electrically between ports. The port 30 first tries the connection to another port 32 and requests the permission of using the arbitration bus 50 through a bus arbitrator 38. When the port 30 receives the permission, a connection request is delivered to the port 32 through the control bus 32 and a status signal is received. The port 30 refuses a transfer request by returning the busy signal shown by the chained-line arrow 56 to the port 32.

    4.
    发明专利
    未知

    公开(公告)号：ES2060684T3

    公开(公告)日：1994-12-01

    申请号：ES89106573

    申请日：1989-04-13

    Applicant: IBM

    Inventor： GUPTA SATISH ,  LARKY STEVEN PHILIP ,  PEEVERS ALAN WESLEY ,  ST CLAIR JOE CHRISTOPHER

    IPC: G09G1/02 ,  G06F3/153 ,  G06F12/08 ,  G06F12/10 ,  G09G5/00 ,  G09G5/14 ,  G09G5/36 ,  G09G5/39 ,  G09G1/16 ,  G09G1/00

    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.

    5.
    发明专利
    未知

    公开(公告)号：DE3889136T2

    公开(公告)日：1994-11-17

    申请号：DE3889136

    申请日：1988-01-26

    Applicant: IBM

    Inventor： GUPTA SATISH ,  LUMELSKY LEON ,  MANSFIELD ROBERT LOCKWOOD ,  ROMERO HECTOR GERARDO ,  SEGRE MARC ,  SPENCER ALEXANDER KOOS ,  ST CLAIR JOE CHRISTOPHER ,  WAGONER JAMES DONALD

    IPC: G06F3/153 ,  G06T11/20 ,  G09G5/393 ,  G09G1/16

    Abstract: As the speed and capacity of graphics workstations and personal computers including graphics adapters increases, a display adapter which can be used either in such a high capacity stand alone graphics workstation or in conjunction with a large main frame host computer includes a first processor for managing adapter resources and controlling coordinate transformations; a system storage for storing instructions and data representing information to be displayed; a first-in, first-out input buffer for allowing asynchronous and overlapped communication between the graphics system and a host computer;a second processor for drawing vectors and manipulating areas to be displayed on the monitor;a frame buffer connected to the second processor for storing a bit map of data to be displayed; a colour palette connected to outputs of the frame buffer for providing appropriate colour signals to the monitor; and a hardware cursor circuit for controlling display of a cursor on the monitor.

    9.
    发明专利
    未知

    公开(公告)号：DE3889136D1

    公开(公告)日：1994-05-26

    申请号：DE3889136

    申请日：1988-01-26

    Applicant: IBM

    Inventor： GUPTA SATISH ,  LUMELSKY LEON ,  MANSFIELD ROBERT LOCKWOOD ,  ROMERO HECTOR GERARDO ,  SEGRE MARC ,  SPENCER ALEXANDER KOOS ,  ST CLAIR JOE CHRISTOPHER ,  WAGONER JAMES DONALD

    IPC: G06F3/153 ,  G06T11/20 ,  G09G5/393 ,  G09G1/16

    Abstract: As the speed and capacity of graphics workstations and personal computers including graphics adapters increases, a display adapter which can be used either in such a high capacity stand alone graphics workstation or in conjunction with a large main frame host computer includes a first processor for managing adapter resources and controlling coordinate transformations; a system storage for storing instructions and data representing information to be displayed; a first-in, first-out input buffer for allowing asynchronous and overlapped communication between the graphics system and a host computer;a second processor for drawing vectors and manipulating areas to be displayed on the monitor;a frame buffer connected to the second processor for storing a bit map of data to be displayed; a colour palette connected to outputs of the frame buffer for providing appropriate colour signals to the monitor; and a hardware cursor circuit for controlling display of a cursor on the monitor.

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