Technique for generating on-screen display characters using soft

Details Technique for generating on-screen display characters using soft Technique for generating on-screen display characters using soft

1996-07-30

2000-06-06

Mengistu, Amare

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345112, G09G 522

Patent

active

060724625

ABSTRACT:
A method for generating a video character in an on-screen display system. The method uses a HALT signal provided to the microprocessor which allows the microprocessor to finish executing its current instruction, but prohibits the microprocessor from beginning a next instruction. After a sufficient amount of time has passed to ensure that the microprocessor has completed its current instruction, an OSD interrupt signal is sent to the microprocessor instructing the microprocessor to begin OSD operations. Alternatively, the method uses a bus multiplexer which duplicates character data and sends the expanded data to a bus in order to enlarge characters displayed on the screen.

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