setup_var_cv allows accessing varying size variables in varstore with the given name. Recent firmwares often stores BIOS settings into multiple varstores, and sometimes most of them are not in default "Setup" name. 8 bytes) variables as it covers all IFR data types except EFI_IFR_TYPE_STRING and EFI_IFR_TYPE_BUFFER, which are both arrays in variable length. This tool assumes the variable is stored in little endian, but to prevent unnecessary loss brought by non-standard firmwares, manually checking the bytes of large values with size 0x01 is always recommended. a 16-bit value 0x01C0 at offset 0x10 would be stored as byte 0xC0 at offset 0x10 and byte 0x01 at offset 0x11. Note: In the UEFI specification, all values are in little endian, which means the variables should be stored in little endian format as well, e.g. Be sure to read the notes before using it! ⚠ This command HAS NOT been tested as I don't have firmware with larger values exposed to UI, so I can't decide the endianness of the varstore. When the size parameter is 0x01, this command behaves the same as setup_var The variable size can be found in the IFR dump. The additional variable size parameter specifies the size of the variable (how many bytes) in hexdecimal, and is required for writing value. With those firmwares, these message will appear in the command output (notice the two var named "Setup" with different GUIDs): Those dummy varstores usually come with fairly small size (less than 0x10 bytes), which gives this command the chance to sort them out. Replace references to the old VG name ( vgold ) with the new VG name ( vgnew ) in the files /etc/fstab and /boot/grub/nf. In some particular firmwares, such as early version BIOS of Dell XPS 8930, multiple varstores with the same name "Setup" exists, while only one of them stores BIOS settings with others not related to settings. It may be used for some Insyde firmwares. Setup_var2 searches for varstore named "Custom" instead of "Setup". This command search for the varstore named "Setup", which most firmware stores Setup settings in, and access the value in it with the given offset. Step 2: Rename the folder by right click on that folder forward by Rename which contains your SLN project. Setup_var is the original command, the main purpose is to access the EFI variables in the varstore with its offset. Step 1: In Visual Studio 2010 the SLN file will be stored under project folder within Visual studio 2010 and Source files are stored under Website folder within Visual Studio 2010. There are some guides like this describing how to change UEFI BIOS hidden settings. One of the nice parts of the app as well, is that once the photos are streamed in real-time, they’re saved. The value to read and write is limited in one byte. Luckily, Visual Grub has used Instagram’s API to do exactly what I was looking for. Without the optional value, the command read the value at the offset. The offset value and the value to write should be in hexadecimal, e.g.
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