Plug and Play External COM Device Specification, Version 1.0




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Legacy-Free PC System Requirements


A PC system is not required to be legacy-free to receive the “Designed for Windows” logo. A PC system is considered legacy free under the Windows Logo Program if it meets the following basic criteria:

  • The LEGACY_DEVICES flag is set to 0 in the Fixed ACPI Description Table (FADT).

  • Operating system detection software does not report the presence of Super I/O-dependent components (with exceptions for 8042 controllers).

  • No components claim to use the restricted port addresses.

The complete hardware and BIOS requirements for Windows-compatible, legacy-free design are described in Appendix A, "System Requirements Checklist," including exceptions and issues for mobile PCs.




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Plug and Play External COM Device Specification, Version 1.0

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