Apparatus for controlling the storage and display of information

Details Apparatus for controlling the storage and display of information Apparatus for controlling the storage and display of information

1987-12-09

1990-06-19

Moore, David K.

Communications: electrical

Land vehicle alarms or indicators

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

340723, 340724, G09G

Patent

active

049357298

ABSTRACT:
A displaying apparatus comprises a CRT capable of displaying picture elements of n rows by m columns and a VRAM (Video RAM). The VRAM comprises a CRT area having addresses of n rows by m columns identical to those of the CRT and a first and a second menu areas formed at both right and left sides of this CRT area. Display data of a formatted document is stored in the CRT area, being converted into a video signal to display an image of the formatted document by means of the CRT. To point a blank space of the formatted document, as cursor is further displayed on the CRT. When a menu display is required, the data of the required menu is stored in the first and the second menu areas, being converted into a video signal. A CPU decides the leading address of the VRAM to start the display so that the cursor and the menu are displayed simultaneously on the CRT screen. Thus, an erasure of the cursor from the CRT screen can be prevented even when the menu is displayed.

REFERENCES:
patent: 3911419 (1975-10-01), Bates et al.
patent: 3974493 (1976-08-01), de Cavaignac et al.
patent: 4354185 (1982-10-01), Worborschil
patent: 4454507 (1984-01-01), Srinivasan et al.

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