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    3.
    发明专利
    未知

    公开(公告)号：DE3576751D1

    公开(公告)日：1990-04-26

    申请号：DE3576751

    申请日：1985-04-26

    Applicant: IBM

    Inventor： MIDDLETON BRIAN HARLAND ,  LAWRENCE STEPHEN GRAHAM COPING

    IPC: G09G5/28 ,  G09G5/22 ,  G09G1/16

    Abstract: A visual display unit with character overstrike capability includes a text store in which text is stored in data stream form. A formatter formats the stored text and loads character codes into a refresh buffer which together with a character generator display the characters on a raster scanned cathode ray tube. Control logic responsive to a backspace character combines the bit patterns corresponding to the characters preceding and succeeding the backspace character in a temporary store and then stores the composite bit pattern in the character generator and a pointer thereto in the refresh buffer. The control logic can be inhibited to allow the individual characters constituting the composite character to be displayed individually for editing purposes.

    DISPLAY TERMINAL
    4.
    发明专利
    DISPLAY TERMINAL 未知

    公开(公告)号：GB2191612A

    公开(公告)日：1987-12-16

    申请号：GB8614210

    申请日：1986-06-11

    Applicant: IBM

    Inventor： LAWRENCE STEPHEN GRAHAM COPING ,  MCMORRAN MICHAEL ALEXANDER ,  MIDDLETON BRIAN HARLAND

    IPC: G06F9/45 ,  G06F3/153 ,  G06F13/00 ,  G06F15/00

    Abstract: Display terminal of the type which is dependent on a host processor for its operation and for its data storage which comprises an interactive language interpreter (24) (eg for BASIC) and means (92) for switching between a session (90) associated with the host and a session (91) dedicated to servicing the interactive language interpreter (24). The provision of means (96) during an interactive language session for displaying and then saving screens of data associated with the host session, enables host data to be processed using user programs in the interactive language.

    TEXT PROCESSING TERMINAL WITH EDITING OF STORED DOCUMENT AT EACH KEYSTROKE
    5.
    发明专利
    TEXT PROCESSING TERMINAL WITH EDITING OF STORED DOCUMENT AT EACH KEYSTROKE 未知

    公开(公告)号：DE3069696D1

    公开(公告)日：1985-01-10

    申请号：DE3069696

    申请日：1980-06-30

    Applicant: IBM

    Inventor： LAWRENCE STEPHEN GRAHAM COPING ,  MIDDLETON BRIAN HARLAND

    IPC: G06F3/12 ,  G06F3/02 ,  G06F17/21 ,  G06F17/22 ,  G06F17/24 ,  G06K15/00 ,  G09G1/00 ,  G09G5/22 ,  G09G5/32 ,  G06F15/20

    Abstract: A text terminal in which a text stream received on a communication link is segmented by a segmenter into chained variable-length segments which are stored in a random access text store. Each segment can contain at most one extended formatting command. Segments have slack areas to allow the subsequent insertion of text. A text editor receives keystroke signals from a keyboard and modifies the stored text stream, new segments being created as necessary for extended formatting commands or when slack areas are full. An interpreter/formatter is invoked when a received text stream has been segmented or when the stored text stream has been modified to format and map the stored text stream into a refresh buffer driving a cathode ray tube (CRT) display. The interpreter/formatter maintains a status index with condensed versions of the extended formatting commands stored in the text stream. Formatting is inhibited by the editor if it receives a keystroke requiring modification of the stored text. After editing segmented text is desegmented by a desegmenter and returned to the host along a communication link in the form in which it was received. Preferably, the terminal is implemented with a microprocessor which can also control standard data entry applications as well as text processing.

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