6-3
System Features
Gatekeeper
Normally, the user application has control of the device and this is referred to as "User
Mode". In Protected Mode, a standard Windows
®
desktop is (normally) available and the
entire machine can be configured. The Gatekeeper is responsible for providing the
opportunity to enter a Protected Mode password. After Windows
®
CE boots, but before any
application takes over the desktop, the Gatekeeper checks (for two seconds) to see if the
user has selected the appropriate combination of buttons (currently A and D) to request
password entry. If the combination is detected, a dialog box is launched for the user to enter
a password. The buttons are also remapped to produce the characters (1, 2, 3, 4, Enter and
Cancel - see below for mapping). The user enters the desired character sequence and
presses "Enter" to submit the password, or "Cancel" to abort the attempt. If the password
is submitted and correct, the Gatekeeper launches the Windows
®
desktop. If the password
is incorrect, or Protected Mode access was not requested and the User Application is
defined, it launches the Symbol "Startup" program. "Startup" is responsible for running
AirBEAM (if present) any system-level programs and finally the User Application. If no User
Application is defined the system boots to Protected Mode.
Regardless of the outcome of the Protected Mode request, the Gatekeeper restores the
button mappings to settings in effect prior to the password entry (or attempt).
.
Note: During startup, some combinations are mapped to provide access to Protected Mode
(see Table: Button Mappings for Protected Mode/Password Entry, below). The mappings
are restored when the device fully boots.
Table 6-1. Button Mappings
Button Combo
Character / Action
Note
A and D
Request Protected Mode
Only for 2 seconds after boot
A
‘1’
During password entry
B
‘2’
During password entry
C
‘3’
During password entry
D
‘4’
During password entry
A and B
‘Enter’
During password entry
C and D
‘Escape’ (Cancel)
During password entry
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