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Basic Input/Output

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August 2016

The Joy of CrScreenshotDxe

The Joy of CrScreenshotDxe
The Joy of CrScreenshotDxe

I’ve been playing with an open-source (Github-hosted) utility written by Mr. Nikolaj Schlej called CrScreenshotDxe .  This utility is imple...

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7:00 AM
William Leara
2
tools
7:00 AM

The Binwalk Firmware Analysis Tool

The Binwalk Firmware Analysis Tool
The Binwalk Firmware Analysis Tool

I’ve recently been experimenting with a wicked-fun tool you may find useful called Binwalk :  a “fast, easy to use tool for analyzing and ex...

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7:00 AM
William Leara
0
tools
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

  • 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...
  • RWEverything. Yes, Everything.
    I’ve done many tools reviews in the history of this web site, so it would be unthinkable to neglect to talk about what may be the biggest a...
  • The Keyboard Controller Interface, 0x60/0x64
    The original IBM PC (1981), and its immediate successor, the IBM PC/XT (1983), had keyboards limited to unidirectional communication:  data ...
  • JEDEC Manufacturer IDs Are a Mess
    The Vendor ID .  Seems like a pretty prosaic topic.  What's to say?  Every vendor has a numeric identifier that is globally unique so th...
  • 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 ...
  • Pete Batard's Resource for UEFI Shells
    Sometimes you'd like to do some work in the UEFI Shell, but you don't have one installed on a USB flash drive that's handy. Or ,...

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      • The Joy of CrScreenshotDxe
      • The Binwalk Firmware Analysis Tool
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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
    Issue with Ubuntu Installation - No Bootable Device and BIOS Password Lock [closed]
  • Vincent Zimmer's blog
    April showers....

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