Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1987-12-21
1990-01-30
Moore, David K.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340723, 340725, 340799, G09G 100
Patent
active
048976369
ABSTRACT:
A video display control system is capable of moving a part of a still image from a first display area to a second display area on a screen. The video display control system includes a memory composed of a plurality of memory locations for storing a plurality of display data representative of images of display elements on the screen. First and second registers retain first and second area data representative of the first and second display areas, and an address data generator generates from these area data first and second address data, the first address data indicating memory locations which store display data corresponding to the first display area, the second address data indicating second memory locations which store display data corresponding to the second display area. A reading circuit reads the display data in the first memory locations in accordance with the first address data, while a writing circuit writes the read display data into the second memory locations in accordance with the second address data. This video display control system further includes another reading circuit and an operation circuit. This reading circuit reads the display data in the second memory locations and feeds the read display data to the operation circuit which effects an operation such as a logical operation or a transparency processing on each pair of the display data read from the first and second memory locations.
REFERENCES:
patent: 4439762 (1984-03-01), Van Vliet et al.
patent: 4688190 (1987-08-01), Bechtolsheim
Ishii Takatoshi
Morimoto Minoru
Nishi Kazuhiko
Okumura Takatoshi
Yamaoka Shigemitsu
Ascii Corporation
Brier Jeffery A.
Moore David K.
Nippon Gakki Seizo Kabushiki Kaisha
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