power_setting

    OpenVMS usage:quadword_unsigned
    type:         quadword (unsigned)
    access:       write only
    mechanism:    by 64-bit value
    A quadword value to specify the new power or performance setting.

 current_value

    OpenVMS usage:quadword_unsigned
    type:         quadword (unsigned)
    access:       read only
    mechanism:    by 64-bit value
    The address of a quadword for the service to return the current
    setting (optional).