Toshiba B-FP2D Series Key Operation Specification page 118

NOTE:
 The BASIC expansion mode ends when the BASIC expansion program is exited.
 When the [POWER] key is pressed without the BASIC expansion mode program loaded, the display does not
change from "10.BASIC Setup" which indicates the BASIC expansion mode menu.
* For details of the BASIC expansion mode, refer to the section, "Startup of System Mode Program" in "the BASIC
Interpreter Specification".
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