公开(公告)号：DE3367291D1

公开(公告)日：1986-12-04

申请号：DE3367291

申请日：1983-03-31

Applicant: IBM ,  IBM UK

Inventor： JACKSON PAUL HENRY

IPC: G06F3/16 ,  G06F3/023 ,  G06F3/048 ,  G06F3/14 ,  G06F3/02

Abstract: In a display terminal coupled to a computer and including a plurality of user interrupt devices for interactive communication with the computer, an apparatus for signalling to the user when the computer responds to a user interrupt comprises a counter arranged to measure a specified period of time by counting down to zero from an initial count value loaded from a register, a sensor triggered by the generation of an interrupt to cause the counter to begin measurement of the said specified period of time, and a further sensr coupled to an alarm via a logic gate to provide an audible signal only when the period of time between the generation of the interrupt and the computer response exceeds the specified period of time measured by the counter.

公开(公告)号：DE3681030D1

公开(公告)日：1991-09-26

申请号：DE3681030

申请日：1986-06-16

Applicant: IBM

Inventor： DICKINSON BARRY ,  FRIEND DAVID JOHN ,  HOLDEN IAN GRAHAM ,  JACKSON PAUL HENRY ,  PADZIESKI ROBERT JOSEPH

IPC: G06T11/00 ,  G06F3/048 ,  G06F3/14 ,  G06F3/153 ,  G06T3/00 ,  G09G5/14 ,  G06F15/62 ,  G09G1/00

Abstract: In the system, image data are stored as a series of scan pel definition signals. The position and size of selected parts of an image to be displayed on the screen of the display device (12) can be transformed in response to signals received from a keyboard (13), tablet (14) or light pen (15). A control program store of the display device stores control programs for a number of transform operations. The system determines when two or more concurrent transforms of parts of an image would cause those parts to be displayed on common areas of the display screen. A list of the transform is ordered and created and signals which define the ordered list of transforms are sent to the display device. In the cases where image portions would occupy common areas of the display screen, the pel definition signals which relate to the higher priority portion of the image are used to control the final content of the common areas of the image displayed.