After searching around, it seems that the most well-known tool for computer BIOS recovery or modification is the CH341A.
There aren’t any special places to buy it, and it’s fine to purchase it by searching on AliExpress. Here’s a purchase link.
In my case, I ordered it with the options mentioned above. Since it’s not very expensive, it seems okay to just buy it with all the options included.
To use the device after purchase, the following steps are required:
- Connect the CH341A via USB.
- Install the driver.
- Run the ROM writer program and perform the writing.
To proceed with these steps, you need to download the driver and the ROM writing program. You can download them by clicking the “Download Link” below, which will take you to the link provided in the post.
Download Link
After downloading, you’ll find many folders. Here’s an explanation of each folder:
- CH341A Driver: This contains the CH341A driver. You must install it using CH341PAR.EXE. Do not use CH341SER.EXE, even if it’s the latest version, as it is for serial communication. For ROM writing, you need to use PAR.
- CH341 programmer v1.1.1.32: This is a very old program, but I’ve kept it just in case.
- CH341 programmer v1.18~1.34: These versions are similar, and you can use any one that suits your ROM writing needs.
- Colibri, Neo, As programmer: These seem to be developed by different teams, but they are fundamentally similar. As programmer appears to be well-maintained.
- UEFITool_0.38.0_win32.zip: This program is used to view BIOS files.
Personally, I think As programmer is sufficient. When overwriting or recovering BIOS, follow these steps:
- Backup: Read IC → Save file
- Program IC: Unprotect → Erase → Program → Verify
Most programs follow this process, although some may include a “Check Blank” step after erasing.