ReBar support on MSI Z77A-G41

BIOS/UEFI Modding BIOS Modding Guides and Problems
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Hi, I’m trying to add ReBar support to an older motherboard, the MSI Z77A-G41. I loaded the bios into UEFI Tools 0.28.0 on Linux, and I’m trying to see if I inserted the RebarDxe in the right place?

The wiki attached to the ReBarUEFI github repo has some unclear instructions that say:

Scroll to the end of the volume that the PciBus module DXE driver is located in. Right click on the last module and select Insert after. Pick the ReBarDxe.ffs file that you downloaded and click Open.

And shows an example of a volume ending (I’d post an image, but it seems I can only show one) where there’s Free Space, but in the case of the Z77A-G41, there isn’t explicit free space at the end of the volume (or before the beginning of the other volume), and instead there are Pad and Raw files. Should I insert the RebarDxe file before the Pad and Raw files or after, or even in between?

Screenshot of the Z77A-G41 bios in UEFITool:

UEFIToolAfterPadding
UEFIToolAfterPadding1297×893 125 KB

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  1. Use MMTool, uefitool usually tends to corrupt old msi bioses (been there)
  2. Insert it at the very bottom most dxe driver. yep, if there is a pad file after the very bottom most dxe driver, then it shhould be before that padfile.
  3. Rebar would only do 1GB cause msi bios on lga 1155 and 1150 (except for H97/Z97) usually doesnt have “above 4g decoding” option in the bios setup.
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Thank you very much for all the advice.

4

You did? I’m trying to add support