Note for Configure to order / Build to order requirements

Note for Configure to order / Build to order requirements: PC clients shipped into retail markets must have at least the minimum hardware support listed in these requirements. Retail markets include:
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Retail “on-shelf” configurations.
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Published advertisements.
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A default configure-to-order or build-to-order system configuration.
It is recognized that OEMs may configure PC systems to meet the requirements of a specific end-user or corporate customer. For systems built based on specific customer requests, where customers request systems without either a CD or DVD optical drive, the system may be configured without an optical storage drive. However, the system must support the addition of a CD or DVD optical drive, and the system firmware must support booting from a CD or DVD device using El Torito Version 1.0 No Emulation Mode if a supporting optical drive is added.
Furthermore, systems may be configured on request without a graphics adapter or network adapter. All retail market desktop systems must include a graphics adapter and support installation of an operating system by including either a CD/DVD drive or network adapter. [see A1.4.3, A1.1.4]
A1.4.4 DELETED A1.4.5 Windows XP clients: System and component design practices follow accessibility guidelines
[WL-7; SYS-0020; see also FAQ A1.5.18]
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Ensure that the keyboard and other input devices work correctly with the Microsoft Accessibility features in Windows. For example, StickyKeys should work with all keys in any keyboard design.
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Make all modifier keys capable of being read and operated by software. This capability allows users to access these keys and the functions that rely on them through operating system features, such as StickyKeys and SerialKeys, and through third-party software, such as voice recognition.
A1.4.6 System with DVD-Video correctly implements playback capabilities
[WL-3; SYS-0035; SDG3:194]
Related requirements are defined in Appendix B, "Device Requirements Checklist"
Note: If a system advertises DVD-Video playback capability or compatibility, then an MPEG decoder is required that meets all DVD requirements. However, if a system includes a DVD-ROM drive and is not capable of DVD-Video playback, then an MPEG-2 decoder is not required.
A1.4.7 Peripherals included with client system offer a non-legacy interface such as PCI, USB, IEEE 1394, or CardBus
[WL-5; SYS-0042]
Keyboards and mice are excluded.
Accessibility peripherals included with a system are excluded, provided that a non-legacy interface peripheral is not available to fulfill the same function.
A1.4.8 x86-based client: System is capable of recovery and upgrade of the hard drive image and upgrade of the BIOS, independent of an FDC-based floppy disk drive
[SYS-0067]
A1.4.9 x86-based client: ROM BIOS interrupt handlers preserve values in all registers
[BIOS-0012]
A1.4.10 Windows XP Home Edition/Professional: Audio is "digital ready"
[AUD-0323]
To be digital ready, the audio subsystem must not utilize analog mixing of audio sources for output. All audio sources should be available as digital audio streams accessible to the system-wide kernel mixer. This includes the CD/DVD drive, TV tuner, hardware synthesizer, and so on. All audio content should be available at both the analog jack and USB port.
Eliminating analog mixing is key to making PC audio easier to configure and easier to use, removing a major obstacle for USB audio rendering devices.
References:
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Digital Audio White Papers and "Windows Support for HID-based Audio Controls" at http://www.microsoft.com/hwdev/audio/
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PC 2001 System Design Guide "Audio" chapter -
A1.4.11 x86-based client: ROM BIOS ensures that the timer is on at system boot and timer interrupts are occurring as part of POST or RESET
[BIOS-0005.5]
A1.4.12 x86-based: Desktop or server system includes APIC support
[SYS-001.3; SDG3:24; see FAQ A1.5.2]
Implemented per Multiple APIC Description Table (ACPI 1.0b, Section 5.2.8).
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All hardware interrupts are connected to an IOAPIC.
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The IOAPIC is connected to the local APIC in the processor.
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