VERFAHREN ZUR BEDIENUNG EINER RECHNEREINRICHTUNG ZUM SCHREIBEN VON TEXTZEICHEN AUF EINE GRAPHISCHE DARSTELLUNG

VERFAHREN ZUR BEDIENUNG EINER RECHNEREINRICHTUNG ZUM SCHREIBEN VON TEXTZEICHEN AUF EINE GRAPHISCHE DARSTELLUNG

Method and system for writing text characters to a raster scan video display (50, 51) operated in an all-points-addressable, or graphics mode, and for reading characters thus written. A graphic video display buffer (34) directly refreshes the display (50) with graphics data received from a microprog...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: BRADLEY, DAVID JOHN
Format: Patent
Sprache:eng ; ger
Schlagworte:
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
PHYSICS
SEALS
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Beschreibung
Zusammenfassung:Method and system for writing text characters to a raster scan video display (50, 51) operated in an all-points-addressable, or graphics mode, and for reading characters thus written. A graphic video display buffer (34) directly refreshes the display (50) with graphics data received from a microprogrammed processor (20). The processor (20) writes a character to the display (50) by selecting and loading into the graphics video display buffer (34) a text character dot pattern retrieved from main storage (25, 27), and expanded to a selected pixel and color format, and reads a character previously written by comparing a dot pattern retrieved from the display buffer (34) with dot pattern retrieved from main storage (25, 27).