SBC35-427/BIOS Update with UEFI Shell
v1.0
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Page 6
standard environment for booting an operating system and running pre-
boot applications.
An optional feature of a UEFI implementation is the ability to boot the
system to a built-in shell. The UEFI shell provides a command prompt and
a rich set of commands that extend and enhance the capability of the UEFI
BIOS.
This section describes the process for updating the SBC35-427 BIOS
firmware image using the built-in UEFI shell.
2.2
Process
1. Insert a USB flash drive containing the BIOS update program into a
USB socket on the SBC35-427 platform.
2. Turn on the SBC35-427 and press
ESC
or
DEL
key during the boot
process, which starts the BIOS setup utility.
3. In the BIOS setup utility, use the cursor keys to highlight the
Save &
Exit
menu option.
4. Use the cursor keys to select
UEFI: Built-In EFI Shell
from the list of
boot devices displayed under the
Boot Override
section.
5. Press
Enter
.
The SBC35-427 executes the built-in UEFI shell, and displays a list of
attached storage devices. The USB flash drive shows up in the list;
depending on other boot devices attached, it may be listed as
fs0
,
fs1
,
etc.
6. From the UEFI shell command prompt, enter the following command
where
N
is the number of the fs device representing the USB flash
drive:
fsN:
The shell prompt changes to indicate that device fsN is now the active
storage device. Example:
fs1:
7. Execute the following command:
ls
The output of the
ls
command is similar to the display listing available
with the Linux or MS-DOS list directory command. If the correct
storage device was selected above, the
ls
command should show the
BIOS update program in the directory
8. Assuming the BIOS update program is named
Update.efi
, enter the
following command at the shell command prompt:
Update.efi
The BIOS update program begins executing.
