The Migration from Legacy BIOS to UEFI Firmware (.PDF Download)

To understand the transition from legacy BIOS to UEFI firmware, it’s best to begin with a review of a decades-old system—the 1983 IBM-compatible PC—and continue with a study of its successor technologies. These include USB, hard disks greater than 100 MB, RAM sizes greater than 640k, high-speed Ethernet networking, CD-ROMs, and other unforeseen technologies.

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