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Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring. It was first released in ...
SFI has CPU, APIC, Memory Map, Idle, Frequency, M-Timer, M-RTC, OEMx, Wake Vector, I²C Device, and a SPI Device table. SFI provides access to a standard ACPI XSDT (Extended System Description Table). XSDT is used by SFI to prevent namespace collision between SPI and ACPI. It can access standard ACPI tables such as PCI Memory Configuration ...
Single UNIX Specification (SUS) 3 2002/01/30 SOAP: 1.2 2003/06/24 Standard Configuration File Format: 1991 Storage Management Initiative - Specification (SMI-S) 1.1.0 2005 Synchronized Multimedia Integration Language (SMIL) 2.1 2005/12/13 SyncML: 1.1 2002/04/02 SQL: SQL:2016: 2016 Transport Layer Security (TLS) 1.2 [16] 2008/08 Unified Modeling ...
Alert Standard Format (ASF) (also sometimes referred to as Alert Standard Forum, Alerting Specifications Forum, Alert Specification Function, etc.) is a DMTF standard for remote monitoring, management and control of computer systems in both OS-present and OS-absent environments. These technologies are primarily focused on minimizing on-site I/T ...
In computing, a devicetree (also written device tree) is a data structure describing the hardware components of a particular computer so that the operating system's kernel can use and manage those components, including the CPU or CPUs, the memory, the buses and the integrated peripherals.
I²C does not have a similar specification. SMBus specifies T LOW:MEXT as the cumulative clock low extend time for a master device. Again I²C does not have a similar specification. SMBus defines both rise and fall time of bus signals. I²C does not. The SMBus time-out specifications do not preclude I²C devices co-operating reliably on the SMBus.
In Windows Vista and later Windows operating systems, the HAL only supports ACPI, and ntdetect.com has been replaced by winload.exe, so that Windows will be able to control hardware resource allocation on every machine in the same way. Hardware profiles are also no longer supported in Windows Vista.
ACPI 1.0 (1996) defines a way for a CPU to go to idle "C states", but defines no frequency-scaling system. ACPI 2.0 (2000) introduces a system of P states (power-performance states) that a processor can use to communicate its possible frequency–power settings to the OS. The operating system then sets the speed as needed by switching between ...