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Basic Input/Output

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September 2014

A Tour of the Intel BITS

A Tour of the Intel BITS
A Tour of the Intel BITS

Burt and Josh Triplett have created a nifty tool for validating that a BIOS has successfully configured Intel resources such as: MSRs C-...

Read more »
7:00 AM
William Leara
0
Intel, testing
7:00 AM

My Favorite Obituary

My Favorite Obituary
My Favorite Obituary

Okay, I know it’s a bizarre title, but bear with me.  Mr. Tom Halfhill , a computer journalist I grew up reading in COMPUTE! magazine, wrot...

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6:00 AM
William Leara
0
Apple, C64, Commodore, history, IBM
6:00 AM

DMTF Webinars Now Available On-Demand

DMTF Webinars Now Available On-Demand
DMTF Webinars Now Available On-Demand

The Desktop Management Task Force (DMTF) produces standards of great interest to BIOS developers.  (e.g., SMBIOS) Did you know that DMTF we...

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8:00 PM
William Leara
0
smbios
8:00 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 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 ...
  • 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...
  • “Hello World” Quick-Start with edk2-stable201908
    Periodically, I've written articles describing how to setup the EDK on a system and configure it to build a basic "Hello, World...
  • 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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      • A Tour of the Intel BITS
      • My Favorite Obituary
      • DMTF Webinars Now Available On-Demand
    • ►  August (9)

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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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