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Identify and Execute Bootrom
Figure 17
Identify and Execute
POST will examine the FLASH memory primary bootrom locations to determine whether or not it contains
a viable bootrom. If the bootrom appears valid then POST will transfer control to it. If the bootrom image is
considered invalid then POST will repeat the bootrom checks at the location of the secondary bootrom. This
step is indicated by the flash of the SCSI4 LED.
Start of bootrom
When POST starts a bootrom image it will display a line like:
Bootrom (*FFF00100)(2)
The number in the first parenthesis is the address of the bootrom's startup code. The number in the second
parenthesis is flag to the operating system to determine what type of boot it has - warm or cold. Bootrom
code will set the ERR LED when it reconfigures the hardware. If successful, the bootrom code will turn off
the RDY LED and circulate the FC, S1, and S2 LEDs while it is counting down to autoboot the main VxWorks
system application image.
Figure 18
Start of bootrom
When the system starts running the VxWorks system image, all LEDs will turn on momentarily.
Figure 19
VxWorks running
Several LEDs will flash indicating that the different stages of the application are being initialized. When
booting is complete, the RDY LED will blink.
Figure 20
SNC is booted and ready
146
POST Error Codes
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