Dot matrix printer control and storage device

摘要

A printer capable of operating in a bidirectional printout mode by converting a print code to pattern data and using a print head in which print elements are arranged in a plurality of arrays. A buffer control is provided for controlling in a ring structure entry and retrieval of pattern data into and out of an image buffer. A detachable font cassette stores the pattern data and data associated with print configurations. A pattern data store stores print pattern data in blocks for each of the print element arrays.