Display processor

Details Display processor Display processor

G - Physics

06

F

354/236.2

G06F 3/14 (2006.01)

Patent

CA 1106072

MRL-301 ABSTRACT OF THE DISCLOSURE A computer terminal employs a CRT display, a micro- processor, and a random access memory which both stores character codes for information to be displayed on the CRT screen and serves as working storage for the processor. To generate a line of text across the display the processor loads a memory address counter with the address of a memory location containing the code for the first character of the line. The counter is incremented in timed relation to the generation of the display and sequentially outputs consecutive memory addresses in which the consecutive character codes forming the line are stored. During the generation of the line the activity of the processor is inhibited. Following generation of the line the processor regains access to the RAM and tends to I/O duties or modifies the display memory contents until it passes control of the RAM back to the address counter for generation of another line of display.

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