[Correction: the .EXE is for MS-DOS, not for Windows.]
Feedback from a very smart reader:
“The Read Universal utility is a Swiss-Army-Knife for BIOS debugging, the tools that provides direct access to almost all resources like memory, IO space, PCI, SMBIOS data, UEFI variables and so on. The tool is written by AMI’s UEFI engineer James Wang.”
James site say: “I wrote RU.EXE for debugging BIOS problems in 1993. It was a simple tool but it turns out to be too complex now. And yes, I am still working for a BIOS company.”
The release includes MS-DOS-based ru.exe and UEFI-based ru.efi binaries. AFAICT, there are no sources on Google Code, it looks like this is a closed-source freeware tool. The release page for each release includes a password. Read the blog for multiple articles that describe new features.
[I’m just learning about this tool, obviously. I’ve been using open source tools for so long that I’m a bit nervous about using closed-source freeware binaries, but recommendation is from someone smart, so I’m setting up a safe environment to learn to use this tool. 🙂 ]
http://ruexe.blogspot.de/
https://code.google.com/p/ru-uefi/