APPARATUS AND METHOD FOR READING AND WRITING TEXT CHARACTERS IN A GRAPHIC DISPLAY

摘要

The method consists of establishing addressability to the locations in the display refresh buffer to receive a selected text character. Addressability to the locations is established in the storage containing a dot image of the selected text character. One portion of the dot image is fetched from the storage. This portion is stored in the display refresh buffer. The storing steps once repeated and fetched for each portion of the dot image to write the text character onto the graphics display. Text characters are read by retrieving from the display buffer dot images.