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Basic Input/Output

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October 2018

Alex Ionescu’s VisualUefi

Alex Ionescu’s VisualUefi
Alex Ionescu’s VisualUefi

Mr. Alex Ionescu created, and has been maintaining for several years now, a wonderful tool called VisualUefi .  A synopsis, from its home o...

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7:00 AM
William Leara
1
EDK, tools
7:00 AM

BSides Portland, Oct 26-27

BSides Portland, Oct 26-27
BSides Portland, Oct 26-27

I was immediately intrigued when I saw the newest BSides Portland event taking place at the end of this month in Portland, OR in the Oregon...

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7:00 AM
William Leara
0
conferences, security
7:00 AM
 
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welcome

Welcome to the Basic Input/Output website! Here I share things pertaining to the arcane art of PC BIOS development. For spice, I add material about software development in general and some interesting computer history vignettes. Please, try to contain your excitement!
—William Leara
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popular

  • Introduction to the Simple Boot Flag
    The Simple Boot Flag , it turns out, is a bit of a mystery.  Trying to find information about this flag, and/or its associated specification...
  • Introduction to Slim Bootloader
    Slim Bootloader (SBL) is an open-source boot firmware built from the ground up for Intel x86 systems. Designed to be small, fast, and secure...
  • Guide to the SWEBOK v4.0 Has Been Released
    The Guide to the Software Engineering Body of Knowledge (SWEBOK) v4.0 was released on October 15, 2024. The Guide is a publication of the ...
  • Reverse Engineering UEFI with Ghidra
    Ghidra is a free and open-source tool for software reverse engineering.  It is extensible, and allows for application-specific capabilities...
  • UEFI Forum Updates All Specs, Dec 2024
    The UEFI Forum updated all three of its specifications in December, 2024:  ACPI, UEFI, and PI. As a refresher: Advanced Configuration and P...
  • UEFITool
    Here’s a handy tool for interrogating firmware volumes:  UEFITool !  It is written by Nikolaj Schlej , and is great for examing the Regions/...

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      • Alex Ionescu’s VisualUefi
      • BSides Portland, Oct 26-27
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latest UEFI specs

  • UEFI Spec 2.11
  • UEFI PI Spec 1.9
  • ACPI 6.5a

UEFI resources

  • presentations, podcasts, videos
  • white papers

UEFI blog roll

  • BIOS on StackOverflow
    How to get memory regions and store into a list on 0x00EFFFFF to 0x1CFFFFF (14MB) in kernel?
  • Vincent Zimmer's blog
    Wind Energy and the Long Arc: Cornell Engineer, December 1990

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