| 摘要 |
PURPOSE:To increase printing speed by detecting early the printing position and transmitting the print positioning data while the data preceding by a line are printed. CONSTITUTION:The print data on the 1st line given from a processor 1 is sent to the 1st buffer 7 of a buffer part 3 and then sent immediately to the 2nd buffer 8 owing to an idle state of the buffer 7. Then the idle buffer 7 requests the data on the 2nd line to the processor 1 and receives it from the processor 1. The data on the 1st line are sent to a serial printer 4 from the buffer 8 to perform a seeking action and starts a printing action when the printing position is decided. Meanwhile the number of characters to be printed on the 2nd line are counted by a seek data detecting part 5 by means of the data on the 2nd line of the buffer 7. Thus the seek data are detected and written to the end of the print data on the 1st line of the buffer 8 via a seek data writing part 6. These actions are repeated to write the data on the following lines in parallel to the buffer 8 during a printing operation. Thus the serial printing actions are carried out with no interruption and therefore the printing speed is increased substantially.
|
