Usage guide
Prerequisites
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Drag and drop the BIOS file into UEFITool NE.
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Search (CTRL + F) for a known setting.
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Double-click the reference to Setup/PE32 image section at the bottom.
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Extract PE32 image section as is.
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Move ifrextractor.exe to the current folder, open the CLI inside and convert the .sct file you just extracted.
ifrextractor.exe "Section_PE32_image_Setup_Setup.sct" verbose
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Scroll down inside the currently expanded section and find AMITSE and setupdata (sometimes both required files are under AMITSE). Extract PE32 image section as is and setupdata as body.
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Upload the 4 files to the UEFI Editor page.
Using the UEFI Editor GUI
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Navigation
- Dotted underlined text has references to Forms and can be clicked.
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You can change the target Form of top-level references here. This is useful for UEFIs that have a custom Advanced Form.
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E.g. on MSI boards, you can replace OC Profiles with Advanced (child of Setup) to gain access to a lot of Forms that are otherwise inaccessible due to missing references while still retaining access to OC Profiles. Press ESC after selecting OC Profiles to access Setup.
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Item visibility control
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Make sure the parent forms are visible when targeting a setting. Use the top-right navigation to travel upwards.
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If one method doesn’t work, try the other one. Using both at the same time can cause issues. It varies from UEFI to UEFI. Try modifying Access Level first.
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Suppress If
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A Suppress If opcode hides nested items if the condition is true. The presence of a Suppress If opcode doesn’t always mean the condition is true. However, if it is, you can remove the suppression by unchecking the offset.
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Access level
Inserting modified files
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Press the UEFI Files download button to download the modified files and the change log.
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To find the correct sections in UEFITool 0.28.0 you can search for File GUIDs you copy from UEFITool NE.
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Replace files the same way you extracted them: Extract as is -> Replace as is and Extract body -> Replace body
Example for Setup/PE32 image section:
UEFITool NE:
UEFITool 0.28.0:
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Save the modifications.
The section below is unrelated to the above tool.
How to change hidden settings without flashing a modded BIOS
Preparation
Download datasone’s modded shell and rename it to BOOTX64.EFI.
Format a USB drive as FAT32 and move BOOTX64.EFI to USB:\EFI\BOOT\ (create the folders EFI and BOOT manually). The final path of the shell will be USB:\EFI\BOOT\BOOTX64.EFI.
Download your current BIOS version from the motherboard vendor’s site. The structure changes across different versions, so make sure you have the same BIOS.
Follow these instructions until and including the conversion with ifrextractor.exe. If there are two Setup sections, use the one that has matching offsets (change settings in BIOS and read values with datasone’s shell to confirm).
Optionally, download IFR-Formatter.js (right-click and Save link as...) and node.exe. Place them in the same folder as the IFR Extractor output and execute node IFR-Formatter.js yourIfrExtractorOutput.txt in the CLI.
Disable Secure Boot and CSM and boot from the USB drive in UEFI mode.
Example
OneOf Prompt: "Intel C-State", Help: "[...]", QuestionFlags: [...], QuestionId: [...], VarStoreId: 0x2, VarOffset: 0x14, Flags: [...], Size: 8, Min: [...], Max: [...], Step: [...] { [...] }
OneOfOption Option: "Auto" Value: 2, Default, MfgDefault { [...] }
OneOfOption Option: "Enabled" Value: 1 { [...] }
OneOfOption Option: "Disabled" Value: 0 { [...] }
End { 29 02 }
Size is a decimal in bits. Convert it to a hexadecimal in bytes.
Value is a decimal. Convert it to a hexadecimal.
Search for the VarStoreId to find the VarStoreName.
VarStore Guid: [...], VarStoreId: 0x2, Size: [...], Name: "CpuSetup" { [...] }
Intel C-State | VarStore: CpuSetup | VarOffset: 0x14 | Size: 0x1
Auto: 0x2
Enabled: 0x1
Disabled: 0x0
Writing
setup_var_cv VarStoreName VarOffset Size Value
setup_var_cv CpuSetup 0x14 0x1 0x0
Reading
setup_var_cv VarStoreName VarOffset Size
setup_var_cv CpuSetup 0x14 0x1
Miscellaneous
To exit and reboot, type:
reboot
Workarounds for various issues (e.g. multiple Setup VarStores): legacy commands
If something unexpected happens, force shutdown and reset CMOS.
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