Unified Extensible Firmware Interface (UEFI)

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Understanding WindowGraphics UsageWindows OS Loader places system into graphics modeRequired for localized text to be renderedWindows prefers graphics output protocol (GOP)Windows supports EFI 1.1 UGA protocol but UGA is deprecated in <strong>UEFI</strong>2.0 specificationBetter long-term choice is GOP support<strong>Firmware</strong> may not manipulate frame buffer after mode is set byOS LoaderWindows requires 1024x768 or 800x600 resolution with32-bit colorIf neither supported, Windows reverts to simple text mode and English
Understanding GraphicsOutputRuntime compatibilityGOP does not support runtime callsWindows sets the mode in OS LoaderPreserve mode and frame buffer after ExitBootServices()and until Windows performance driver takes overFor Windows Server Longhorn VGA support stillrequires int10h supportRequired for many video cardsWish to loosen this restriction in future releasesSpecify the VGA not present ACPI flag on server systemswithout video card
Page 1 and 2: Unified ExtensibleFirmware Interfac
Page 3 and 4: Agenda2 key audiences, 2 focusesInt
Page 5 and 6: What Is UEFI?UEFI runs in long-mode
Page 7 and 8: Why Is UEFI Important?Engineering e
Page 9 and 10: Windows Firmware RoadmapGoalsEnable
Page 11 and 12: Evolution Of UEFI(1 of 4)Late1990
Page 13 and 14: Evolution Of UEFI(3 of 4)2005Window
Page 15 and 16: UEFI Solutions Emerging…UEFIspeci
Page 17 and 18: Windows Support For ItaniumWindows
Page 19 and 20: Guidelines For BuildingA UEFI Platf
Page 21 and 22: Required Firmware ElementsMust supp
Page 23 and 24: DVD Media RequirementsWindows uses
Page 25 and 26: Network Boot RequirementsMust send
Page 27 and 28: GPT Disk Partitioning
Page 29: Firmware Boot RequirementsRequired
Page 33 and 34: Variable Services And WHEAWHEA Erro
Page 35 and 36: BCD DeploymentWindows stores boot s
Page 37 and 38: UEFI And Image DeploymentImage Depl
Page 39 and 40: Call To ActionUnderstand industry m
Page 41: © 2007 Microsoft Corporation. All

Unified Extensible Firmware Interface (UEFI)

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