: Users can add, delete, or extract PEI and DXE modules and Option ROMs.
For most modding tasks, and Replace are the workhorses.
The tool will list all modules in the "Fit" tab. mmtool 4.50.0.23
Whether your goal is to add native NVMe boot support to a legacy motherboard, update CPU microcodes to protect against vulnerabilities like Spectre, or inject custom drivers, MMTool 4.50.0.23 remains an essential component of the PC modder's toolkit. Core Capabilities of MMTool 4.50.0.23
Users of this tool often keep a hardware flasher (like a CH341A programmer) on hand to manually rewrite the BIOS chip if a software flash fails. : Users can add, delete, or extract PEI
: Users typically use the tool to insert an NvmExpressDxe_5.ffs driver into the DXE volume of the BIOS.
firmware images (BIOS files). It allows users to view, extract, replace, and insert components within the BIOS structure without requiring the original source code. Core Functionality The tool operates by interacting with the FFS (Firmware File System) of a BIOS ROM. Its primary capabilities include: Module Management Whether your goal is to add native NVMe
: Remove unnecessary modules to free up space in the BIOS chip's limited memory. Common Use Case: Adding NVMe Support This is the most frequent reason to use version 4.50.0.23.
: Update or add new CPU microcode to support newer processors on older motherboards.
| Tab | Function | Why Use It? | |------|----------|--------------| | | View and extract components (DXE drivers, PEI modules, SMM handlers) from BIOS | Backup original modules before editing | | Replace | Swap an existing module with a modified version | Patch a driver, inject a custom EFI app | | Insert | Add a new module into a free volume slot | Add NVMe driver, add network boot ROM | | Delete | Remove modules entirely | Strip out unneeded features for space | | Change Settings | Modify EFI volume attributes | Alter compression, set GUIDs | | Secure Boot | Manage keys and signatures | Insert custom PK, KEK, DB keys |
: It cannot be used for newer "Aptio V" firmware (generally Skylake and newer). Using it on these files will result in "The input image is not Aptio V" errors. Module Corruption