| 摘要 |
PURPOSE:To attain the reuse of a command by storing a command supplied by a key operation into a processing memory. CONSTITUTION:A command supplied through a keyboard 3 is stored in a memory 2 and also written to a screen buffer 4 and written on a CRT 5. The command written to the buffer 4 and displayed on the CRT 5 is erased out of the screen as soon as it is executed. If it is desired the previous screen is recovered after execution of the command and this command is edited on the screen for reuse, the contents written into the memory 2 are read out and written to the buffer 4 to be displayed again on the CRT 5. These displayed contents are edited for execution of a command. The screen is saved by key operations.
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