| 摘要 |
<p>PURPOSE:To eliminate the need to provide each subprocessor with a display device control function by writing display data of subprocessors in a common transmission area in specific form, and reading them by a host processor and performing display control. CONSTITUTION:Display data written in the data buffer 21 of some subprocessor is written in the specific format in two transmission areas 22-1 and 22-2 which are common to the respective subprocessors and used alternately. Then, the data are read out by the host processor and stored in the data buffer 23 of the host processor, and the data of the subprocessor is outputted and displayed under the control of the host processor based upon the storage contents. Consequently, each subprocessor needs not have the display device control function and the need to switch output data of respective processors is eliminated, so that display data output control is performed through the simple constitution.</p> |
