Graphics controller including a sub-memory

Graphics controller including a sub-memory

The content of a color designating register 3 that designates any color is compared with data preliminarily written to a main VRAM 4. The compared resultant data is stored in a sub-memory 2. In the case that display data is read, when data stored in the sub-memory 2 represents "match," col...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SHIRAKAWA, HARUYUKI
Format: Patent
Sprache:eng
Schlagworte:
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CALCULATING
COMPUTING
COUNTING
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC DIGITAL DATA PROCESSING
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
SEALS
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Beschreibung
Zusammenfassung:The content of a color designating register 3 that designates any color is compared with data preliminarily written to a main VRAM 4. The compared resultant data is stored in a sub-memory 2. In the case that display data is read, when data stored in the sub-memory 2 represents "match," color data stored in a palette 8 is then stored in a CRT-FIFO 5 through a switching portion 10, and the read operation to the main VRAM 4 for relevant pixel data is stopped. When data stored in the sub-memory 2 represents "miss-match," color data stored in the VRAM is then stored in a CRT-FIFO 5 through a switching portion 10.