What is IFR?
Quick note explaining IFR for BIOS/UEFI and embedded firmware readers.
What is IFR?
IFR (Internal Forms Representation) is the compiled binary form representation consumed by the setup browser.
Why it matters
- Explains how BIOS Setup UI is defined and connected to variables.
- Helps debug missing, disabled, or incorrectly saved setup options.
- Connects VFR/IFR/HII concepts with real setup behavior.
Practical example
Example: if a setup item does not appear, check the VFR/IFR condition first: SuppressIf may hide it completely, while GrayOutIf only disables it.
Quick checklist
- Does the FormSet/Form/Question exist in the generated IFR?
- Is the VarStore or variable mapping correct?
- Is the item hidden by SuppressIf or disabled by GrayOutIf?
Quick takeaway
IFR is easier to understand when you separate UI description, variable storage, and driver-side callback logic.
Related notes
- What is VFR?
- What is Form Package?
- What is Setup Browser?
- What is HII Database?
- What is HII Package List?
Public references
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Nội dung liên quan
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What is HII?
Quick note explaining HII for BIOS/UEFI and embedded firmware readers.
What is Checkbox in VFR?
Quick note explaining Checkbox in VFR for BIOS/UEFI and embedded firmware readers.
What is Config Access Protocol?
Quick note explaining Config Access Protocol for BIOS/UEFI and embedded firmware readers.
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