System Management Intel® 5000 Series Chipsets Server Board Family Datasheet
Revision 1.1
Intel order number D38960-004
108
4.5.4.3 Reset Button
An assertion of the front panel reset signal to the BMC causes the system to start the reset and
reboot process, as long as the BMC has not locked-out this input. This assertion is immediate
and without the cooperation from software or the operating system.
The reset button is a momentary contact button on the front panel. Its signal is routed through
the front panel connector to the BMC, which monitors and de-bounces it.
If front panel lock-out is enabled, the reset button does not reset the system. Instead an event
message is generated to the SEL.
4.5.4.4 Diagnostic Interrupt (Front Panel NMI)
As stated in the IPMI 2.0 specification, “a diagnostic interrupt is a non-maskable interrupt or
signal for generating diagnostic traces and ‘core dumps’ from the operating system.” For
platforms that use one of the Intel
®
5000 Series Chipsets, this is an NMI.
The diagnostic interrupt button is connected to the BMC through the front panel connector. A
diagnostic interrupt button press causes the BMC to do the following:
Generate a critical event message.
Generate a system NMI pulse.
After an NMI has been generated by the BMC, the BMC will not generate another until the
system has been reset or powered down.
The BMC automatically clears the OEM 1 message flag and NMI sources whenever it detects a
system reset, or is itself reset. The diagnostic interrupt button is not disabled or otherwise
affected when the system is in front panel lock-out mode.
4.5.4.5 Chassis Identify
The front panel chassis identify button toggles the state of the chassis ID LED. If the LED is off,
then pushing the chassis identify button lights the LED. The LED remains lit until the button is
pushed again.
4.5.5 Front Panel Lock-out Operation
The front panel lock-out feature allows the front panel buttons to be protected against
unauthorized use or access. Front panel lock-out mode is enabled and controlled by the system
BIOS. When front panel lock-out is enabled and active, and a protected front panel button is
pressed, an event is generated.
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