As defined in Appendix B, "Device Requirements Checklist"
ACPI BIOS must be Windows-ready:
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x86-based client and server systems: ACPI-compliant as defined in ACPI 1.0b, Section 1.6
The system board and BIOS must support Advanced Configuration and Power Interface Specification, Revision 1.0b.
System board devices not power managed or configured via standard bus specifications must comply with ACPI 1.0b.
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Itanium-based systems: ACPI 2.0 plus 64-bit fixed tables; see A5.4.1.
A1.1.2.1 DELETED A1.1.2.2 Power management and Plug and Play capabilities are ACPI compliant.
A1.1.2.2.1 All system-board power management or Plug and Play features comply with the ACPI 1.0b. This requirement applies even if a particular feature is not a specific requirement or recommendation in ACPI 1.0b.
A1.1.2.2.2 System supports S3, S4, and S5 states. Desktop and single-processor workstation systems must support the S5 (soft-off) state as required in the ACPI 1.0b specification, plus the S3 and S4 states. Every system must support wake from all implemented sleep states, except S4 and S5, for all wake-capable devices and buses.
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