User manual

Connect Tech Blue Heat/Net User Manual
Revision 0.17 97
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 Command Reference/TCM Command Reference,
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