| 摘要 |
PURPOSE:To simultaneously display inputted information and operating method and explanation of its own device through a displaying means, by providing an RAM equipped with a line memory, error information storing register, etc., at the inside, video RAM, etc. CONSTITUTION:When misoperation occurs and operating procedures, namely, operating method and explanation of its own device are required to be displayed, the operator of this device depresses a key 'HELP' on a keyfboard KBZDsd. When the 'HELZ' key is depressed, the display data on the 25th line of a video RAM VRAM are transferred to a line memory SAVE1 in an RAM. Then an explaining sentence and operating method corresponding to the error are read out from a floppy disk through an error information storing register ERRCD and transferred to and stored in an unused area of the RAM. There after, the content is written on the 25th line of the VRAM and displayed on the 25th line of a CRT picture through a CRT display controller. Therefore, inputted information and operating procedures of this device can be displayed information and operating procedures of this device can be displayed simultane ously through the displaying means.
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