Graphical user interface
Figure 3: Monitor elements
(21) Windows desktop
(22) Start menu
(23) Mouse pointer
(24) On-screen keyboard
(25) Windows taskbar
(26) Icon for mouse button switch
(27) Preinstalled programs for screen control
Operation is carried out using a mouse pointer (23), which follows the operations of the
touchscreen. Brief touches of the screen are interpreted as actuation of the mouse buttons.
Pressing the icon (26) in the information area of the taskbar (25) allows switching of the mouse
button. Text can be input using the Windows on-screen keyboard (24).
When delivered, programs are preinstalled on the desktop (27). These are used to switch the
mouse pointer on and off, to calibrate the touchscreen and to switch the mouse buttons.
i
Additional operating devices, such as a keyboard or a mouse, can be connected to the
USB interface.
File-based write filter
The device contains a hard drive - SSD - as a mass storage facility. To prevent unauthorised
changes to the configuration, the drive is protected by a file-based write filter - FBWF. Write
operations to the protected are a diverted to a virtual drive in the RAM. Changes to this data are
shown in the directory but are only available until the device is restarted. The previous data is
restored is the device is switched-off or there is a power failure.
Changes to the "My Documents" directory are excluded from write-protection and are always
applied.
The write filter must be switched off:
-
When directories are created, which are to remain intact after a restart,
-
When programs are installed.
The system must be restarted:
-
When the write filter is switched on or off,
-
When the size of the virtual drive is changed,
-
When memory compression is switched on or off.
The user can change the settings for the file-based write filter.
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Control 9 Client
