Computer device display system using conditionally asynchronous

Details Computer device display system using conditionally asynchronous Computer device display system using conditionally asynchronous

1987-01-28

1989-08-15

Williams, Jr., Archie E.

Boots, shoes, and leggings

3642463, 3642387, 364270, 3642715, 3642716, 3642427, 3642373, 3642702, 364518, 364521, G06F 314, G06F 3153, G06F 1330, G06F 1562

Patent

active

048581070

ABSTRACT:
A computer system has a central processing unit and a video display processor both of which must directly access the system memory. The display processor must access the memory once in a given time period which time period is long enough that several accesses by the central processing unit and the display processor would be possible. The system includes a memory controller which allows the central processing unit to have memory access priority over the display processor, as long as sufficient time remains in the period for the display processor to complete its access after the access by the processing unit. If insufficient time remains, the display processor has priority for memory access. To implement this priority scheme, a new system memory organization is employed, dividing the memory into banks or bit planes and providing each bank with a respective temporary storage latch that loads to a respective shift register. The serial data stream from the shift registers supply the video display processor video code information on a continuing basis. The timing of memory read out to the temporary storage latches is timed in accordance with the memory priority protocol.

REFERENCES:
patent: 4415985 (1983-11-01), Mcdaniel
patent: 4595917 (1986-06-01), McCallister et al.
patent: 4620186 (1986-10-01), Krause et al.
patent: 4811109 (1989-03-01), Shimizu

Affiliated with

Also associated with

Rating

Computer device display system using conditionally asynchronous does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computer device display system using conditionally asynchronous , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer device display system using conditionally asynchronous will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-127026