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ACPI 6.2, Courtesy of Nikolaj

ACPI 6.2, Courtesy of Nikolaj
ACPI 6.2, Courtesy of Nikolaj

This is the third and final installment in the “Courtesy of Nikolaj” series of posts.    Nikolaj Schlej recently took to Twitter to summari...

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7:00 AM
William Leara
0
specifications
7:00 AM

Windows Calculator. Windows Calculator???

Windows Calculator. Windows Calculator???
Windows Calculator. Windows Calculator???

This is a blog post about Windows Calculator.  No, seriously!  Why a blog post about Windows Calculator?  Well: it gives me a chance to do a...

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7:00 AM
William Leara
0
tools, Windows
7:00 AM

PI 1.6, Courtesy of Nikolaj

PI 1.6, Courtesy of Nikolaj
PI 1.6, Courtesy of Nikolaj

The UEFI Forum recently announced updates to the UEFI, PI, and ACPI specs.  In a previous post , I mentioned how Nikolaj Schlej tweeted...

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7:00 AM
William Leara
0
specifications
7:00 AM

UEFI 2.7, Courtesy of Nikolaj

UEFI 2.7, Courtesy of Nikolaj
UEFI 2.7, Courtesy of Nikolaj

The UEFI 2.7 Spec was recently released, as I’ve mentioned before .  Every time a new version of the spec is released, I have this great ide...

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6:00 PM
William Leara
0
specifications
6:00 PM
 
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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 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...
  • 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...
  • 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 ...
  • A Tour of Intel CHIPSEC
    CHIPSEC is a framework for analyzing the security of PC platforms, including their hardware, BIOS, and platform configuration.  It includes...
  • UEFITool
    Here’s a handy tool for interrogating firmware volumes:  UEFITool !  It is written by Nikolaj Schlej , and is great for examing the Regions/...
  • 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...

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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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