| 摘要 |
<p>GRAPHIC DATA COMPRESSION Code compression for a dot printer having a printhead with a vertical line of print elements reduces requirements for space in font memory and is readily translated and acted upon. In each eight-bit byte, microprocessor interprets three bits as coding mode commands and the other five bits as content information, primarily as numbers. Printer control code modes are: black in sequence, complete white, white in sequence, repeat column, map bytes (bit-for-bit), and offset. The content information number is stored in a register and printing in the form defined by the code mode is executed the number of times as stored in the register.</p> |
