| 摘要 |
PURPOSE:To improve the utilizing efficiency of a display data storage circuit by providing an end code representing the end of data stored in the display data storage circuit, a search start address of the stored data and a search end address. CONSTITUTION:A message data 13 decoded by a decoder circuit becomes a display data by a display data forming circuit 7. In writing the display data in a display data storage section 18, the display data D1 stored already in advance in a storage section 18 is read by using the search start address 14 of a display data storage circuit 8, the search end address 15, and an end code EOF representing the end of data through the control of a control circuit 16 and the data is compared with a new display data. When they are not coincident, write is started from a search start address alpha as the new display data D2, the write is finished by giving a code EOF at the end of the display data and the search start address is changed to alpha'. |
