Casio IT-800 Series Software Manual page 154

The functions of the System Library relevant to the "Virtual Off" are as follows.
SysDisablePowerOff
SysSetVirtualOffMode
SysSetVirtualOffModeEx : Sets up "Enable" or "Disable" for virtual turning off for panel,
SysGetVirtualOffMode
: Set up "Disable" for turning off the power on the terminal.
: Sets up "Enable" or "Disable" for virtual turning off the power.
screen, key operations, prohibition on APO, prohibition on
turning off the power, and setting CPU speed.
: Retrieves "Enable" or "Disable" status for virtual turning off the
power.
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