Method of generating a cursor

Details Method of generating a cursor Method of generating a cursor

1990-09-28

1992-03-17

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

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

340709, G09G 322

Patent

active

050972561

ABSTRACT:
A system for using the page buffer memory which stores the pixel map to generate the cursor in a CRT display. An unused portion of the memory is used to store a duplicate copy of the band in which the cursor is currently located, and the cursor is written into its appropriate location in this duplicate band, thus destroying the underlying image in the duplicate, but not in the original. The display is then generated by cycling through the page buffer except that the duplicate band containing the cursor, instead of the original band containing the underlying image, is displayed. After each display is generated, during the time when the scan returns from the bottom to the top of the display, if the cursor has moved since the previous display, the new band containing the cursor is created in the unused portion, and the display process is repeated.

REFERENCES:
patent: 4646078 (1987-02-01), Knierim et al.
patent: 4668947 (1987-05-01), Clarke
patent: 4706074 (1987-11-01), Muhich et al.
patent: 4918427 (1990-04-01), Clarke
Mitsubishi Electric Specification of the M5M4C264P-12 Dual-Port Dynamic RAM, Aug. 1986.

Affiliated with

Also associated with

Rating

Method of generating a cursor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of generating a cursor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of generating a cursor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1479259