Claims
- 1. A graphic display control system which performs multi-window display, comprising:
- image display means for providing a display screen composed of a plurality of pixels or character sections;
- at least two image storage means for storing image information, each of said at least two image storage means having a storage capacity for the display screen of said image display means;
- two image-selection-information storage means for storing image-selection information the image-selection information in each image-selection-information storage means selecting one of said at least two image storage means at every pixel or every character section of a portion of the display screen of said image display means;
- selection information output means for receiving a selection indication signal, for selecting a first one of said two image-selection-information storage means according to the selection indication signal, and for outputting the image-selection information stored in the first one of said image-selection-information storage means;
- control means for writing new image-selection information to a second one of said image-selection-information storage means, and for outputting the selection indication signal to said selection information output means to alternate selection between said two image-selection-information storage means when writing of the new image-selection information is completed; and
- image selection output means for selecting one of said at least two image storage means at every pixel or every character section based on the image-selection information outputted by said selection information output means, and for outputting the image information stored in the one of said at least two image storage means to said image display means.
- 2. A graphic display control system according to claim 1,
- wherein said image display means produces a vertical synchronization signal, and
- wherein after receiving the selection indication signal from said control means, said selection information output means selects the second one of said two image-selection-information storage means in synchronization with the vertical synchronization signal received from said image display means, and outputs the image-selection information stored in the second one of said image-selection-information storage means.
Priority Claims (3)
Number |
Date |
Country |
Kind |
3-315007 |
Nov 1991 |
JPX |
|
4-269006 |
Oct 1992 |
JPX |
|
5-074914 |
Apr 1993 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/062,531, filed May 18, 1993, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (7)
Number |
Date |
Country |
01225990 |
Sep 1989 |
JPX |
01287695 |
Nov 1989 |
JPX |
1319788 |
Dec 1989 |
JPX |
02059797 |
Feb 1990 |
JPX |
03067294 |
Apr 1991 |
JPX |
3171087 |
Jun 1991 |
JPX |
3131898 |
Jun 1991 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
62531 |
May 1993 |
|