Mixed pitch display

Details Mixed pitch display Mixed pitch display

G - Physics

06

F

354/229, 354/236

G06F 3/153 (2006.01) G06F 3/023 (2006.01) G06F 17/21 (2006.01) G09G 5/22 (2006.01)

Patent

CA 1171547

MIXED PITCH DISPLAY ABSTRACT OF THE INVENTION Operator keystrokes are processed in a text processor system to put characters and symbols on a fixed pitch display screen without limitation as to other size charac- ters or symbols on the screen. Keystroke data is processed under the control of programs stored in a random access memory. For a mixed pitch display, the random access memory of the system is structured to include a text storage buffer and a display control block both interconnected to an applications program and a display access method program. Data is stored in the text storage buffer in an unformatted configuration in a mixed pitch arrangement and the programs evaluate the data to display characters and symbols with correct character pitch. The programs also draw a scale line on the screen to provide character information to the operator. After running the display access method program in accordance with application program commands, a refresh buffer provides display signals to visually present by means of the display screen characters at an identified position in a mixed pitch format. AT9-81-036 B-15140

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