Connect Tech Blue Heat/Net User’s Manual
104 Revision
0.13
How the Blue Heat/Net Boots Up
Each time the Blue Heat/Net is powered-up or rebooted with an appropriate command, a certain
sequence of software execution occurs.
The
Booter
runs from Flash memory first. Its job is to perform the following:
Setup the embedded processor
Validate at least one of the redundant
Loaders
(via a CRC check).
Load a validated
Loader
into RAM memory.
Run the
Loader
.
If the
Booter
discovers that both
Loader
programs are defective (erased or faulty CRC
calculation), an error code is displayed on the LEDs of the Blue Heat/Net.
The
Loader
runs from RAM memory. Its job is to perform the following:
o
Update any required CDS items.
o
Determine if the SCM application will be entered. This is accomplished by
scanning the designated serial ports, for a period of time, to determine if a
correct password is entered. If the password is found the SCM application will
be entered. (see the
SCM/TCM,
cfg
command for details of these settings).
o
Locate, load and run an Operating System (uClinux). (As shown in the
following boot-up flow chart).
o
Run the main Operating System (uClinux).
o
Operating System launches port personality default
ctid
