EFI Instructions

Basic Instructions for Using the Extensible Firmware Interface (EFI) Using EFI

Revision 2.0

1.4 Running the EFI script under the EFI Shell

 Change from the EFI shell to the USB device folder:

The first USB device found shows up in the mapping as fs0 (File system 0); the next

device shows up as fs1, etc.

If you add a new media after the initial mapping or if you change it at any time while in

the EFI shell, type the command:

map –r (This command refreshes the mounting and mapping).

To change from the shell to the media, type the fs# followed by a colon (:). The prompt

displays the current directory.

shell> fs0: becomes fs0:>

Note: Once you have changed to media, you may change to other media including RAM disks

(commonly fsz:) but there is no need to return to the base shell.

 Run the EFI script which is under the USB device.

An EFI script ends with .nsh. You can edit the .nsh script to add a bunch of commands

to perform certain tasks.

As startup.nsh is the equivalent of autoexec.bat in the DOS/Windows environment, Intel

usually provides the startup.nsh script in the System Firmware Update package. This

script is used to perform all System Firmware Update tasks.

To manually run the startup.nsh script, type:

fs0:> startup.nsh

fs0:> startup

To run your own script, type:

fs0:> bios.nsh

fs0:> bios

1.5 EFI script examples

EFI script is not just the combination of some EFI commands; it may contain some batch only

commands as well: