Claims
- 1. A display controller for inputting and outputting a signal to and from a computer to control a drawing operation used for inputting signals for storage in a refresh memory and to control a display operation used for reading out the signals stored in the refresh memory for display on a display device in response to clock signals from a clock, comprising:
- a timing processing means responsive to the clock signals for generating display timing signals of a plurality of display frames;
- a display processing means which stores display addresses in response to the display timing signals from the timing processor of a plurality of display frames, renews the display addresses of the plurality of display frames independently, and outputs the display addresses to the refresh memory in a time multiplexed manner; and
- a synthesizing means for synthesizing reading signals from the refresh memory in response to the plurality of display frames for a superposed display.
- 2. A display controller in accordance with claim 1, wherein said display processor comprises:
- computing means for computing increments of display addresses whenever the display timing signals are generated from the timing processing means; and
- generating means for generating individual display addresses as a sum of the increments and the stored display starting addresses.
Priority Claims (1)
Number |
Date |
Country |
Kind |
58-118228 |
Jan 1983 |
JPX |
|
Parent Case Info
This is a Continuation of application Ser. No. 08/627,546, filed Apr. 4, 1996, now abandoned; which is a Divisional of application Ser. No. 07/799,889, filed Dec. 2, 1991, now U.S. Pat. No. 5,696,540; which is a continuation of Ser. No. 07/198,067, filed May 24, 1988, now abandoned; which is a continuation of Ser. No. 06/626,992, filed Jul. 2, 1984, now U.S. Pat. No. 4,757,310.
US Referenced Citations (8)
Divisions (1)
|
Number |
Date |
Country |
Parent |
799889 |
Dec 1991 |
|
Continuations (3)
|
Number |
Date |
Country |
Parent |
627546 |
Apr 1996 |
|
Parent |
198067 |
May 1988 |
|
Parent |
626992 |
Jul 1984 |
|