Copyright
©
2011
congatec
AG
BM67_BS67m02
97/101
Feature
Options
Description
System Off Mode
G3/Mech Off
S5/Soft Off
Define system state after shutdown when a battery system is present.
►USB Boot Control
submenu
Enables or disables the OS boot from some USB port.
GateA20 Active
Upon Request
Always
Gate A20 control.
Upon Request = Gate A20 can be disabled using BIOS services.
Always = Do not allow disabling Gate A20.
Option ROM
Messages
Disabled
Enabled
Set display mode for option ROMs.
Interrupt 19 Capture
Disabled
Enabled
Defines whether option ROMs may trap the INT19h legacy boot vector.
Note
1. The term ‘AC power loss’ stands for the state when the module looses the standby voltage on the 5V_SB pins. On congatec modules, the
standby voltage is continuously monitored after the system is turned off. If within 30 seconds the standby voltage is no longer detected, then
this is considered an AC power loss condition. If the standby voltage remains stable for 30 seconds, then it is assumed that the system was
switched off properly.
2. Inexpensive ATX power supplies often have problems with short AC power sags. When using these ATX power supplies it is possible that
the system turns off but does not switch back on, even when the PS_ON# signal is asserted correctly by the module. In this case, the internal
circuitry of the ATX power supply has become confused. Usually another AC power off/on cycle is necessary to recover from this situation.
3. Unlike other module designs available in the embedded market, a CMOS battery is not required by congatec modules to support the ‘Power
Loss Control’ feature.
9.6.1.1
USB Control Submenu
Feature
Options
Description
USB Port x Boot
Disabled
Enabled
Enables or disables the OS boot from the relevant USB port.
