Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1985-12-17
1989-10-10
Yusko, Donald J.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340724, 340728, G09G 116
Patent
active
048735140
ABSTRACT:
In a CRT display system, its screen is divided into a least two partitions or viewports for displaying different data groups, and characters in one of the groups can be vertically scrolled bit by bit in one of the partitions. The partition to be scrolled is defined by line attributes assigned to successive rows of the screen. When a raster scan passes the scrolling partition, a line count output of a (scan) line counter is modified by adding a content of a smooth scroll offset register to the line count. The modified line count is used together with a character code as an address for a character generator. By gradually changing the content of the offset register, the characters are vertically shifted smoothly in the partition.
REFERENCES:
patent: 3643252 (1972-02-01), Roberts, Jr.
patent: 3792462 (1974-02-01), Casey et al.
patent: 4204206 (1980-05-01), Bakula et al.
patent: 4412294 (1983-10-01), Watts et al.
patent: 4418344 (1983-11-01), Brown
patent: 4437093 (1984-03-01), Bradley
patent: 4489317 (1984-12-01), Shiga
patent: 4520356 (1985-05-01), O'Keefe et al.
patent: 4663617 (1987-05-01), Stockwell
Nakagawa Banri
Nojima Katsuyuki
Fatah-yar M.
International Business Machines - Corporation
Moore J. Dennis
Poag Frederick D.
Walker Mark S.
LandOfFree
Video display system for scrolling text in selected portions of does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video display system for scrolling text in selected portions of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video display system for scrolling text in selected portions of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1959902