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October 2021

Introduction to DeviceTree

Introduction to DeviceTree

Introduction to DeviceTree

Devicetree is a representation of a hardware configuration, most especially non-discoverable hardware devices, passed from a bootstrap firm...

William Leara

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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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VS Code Plugin for UEFI: Edk2Code

One of the challenges of EDK2 development is its domain specificity. By that, I mean that EDK2 is laser-focused on one, and only one, thing...
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There is a long and complex series of steps that turn your EFI source code into bits sitting on a SPI part. Ever wonder how that works? I ...
Pardon the Interruption... A Brief History of Interrupts

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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...

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