System for providing data communication between a computer termi

Details System for providing data communication between a computer termi System for providing data communication between a computer termi

1985-10-04

1988-08-02

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340723, 340747, 364521, G09G 116

Patent

active

047616423

ABSTRACT:
An apparatus for displaying the display outputs of a plurality of simultaneously active computer processes in corresponding windows on a single screen includes a microcomputer, a display screen and display system software. The software represents a plurality of virtual terminals, one corresponding to each active process, for emulating the operation of real terminals communicating with the processes. Each virtual terminal maintains a display list comprising a set of instructions defining a display on a screen according to the output from the corresponding process. The software also includes a screen process for maintaining a subrectangle list comprising a set of instructions for allocating window portions of the screen to the displays defined by the separate display lists. A display list processor is provided for creating the windows on the screen according to the display and subrectangle lists.

REFERENCES:
patent: 3898643 (1975-08-01), Ettlinger
patent: 4258361 (1981-03-01), Hydes et al.
patent: 4498081 (1985-02-01), Fukushima et al.
patent: 4559533 (1985-12-01), Bass et al.
patent: 4598384 (1986-07-01), Shaw et al.
patent: 4618859 (1986-10-01), Ikeda
patent: 4642790 (1987-02-01), Minshull et al.

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