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  2. Message Signaled Interrupts - Wikipedia

    en.wikipedia.org/wiki/Message_Signaled_Interrupts

    MSI is not supported in earlier versions like Windows XP or Windows Server 2003. [15] Solaris Express 6/05 released in 2005 added support for MSI an MSI-X as part of their new device driver interface (DDI) interrupt framework. [16] FreeBSD 6.3 and 7.0 released in 2008 added support for MSI and MSI-X. [17] OpenBSD 5.0 released in 2011 added ...

  3. Embedded controller - Wikipedia

    en.wikipedia.org/wiki/Embedded_controller

    Other buttons and switches (e.g., power button, laptop lid switch (received from hall sensor)) [2] Controlling access to the A20 line [ 3 ] Thermal measurement (CPU, GPU, Motherboard) and response including fan control , CPU and GPU throttling , and emergency shutdown in response to rising temperatures

  4. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    Power supply, system board, RAM or keyboard problem Repeating short beeps: Power supply, system board or keyboard problem 1 long, 1 short beep: System board problem 1 long, 2 short beeps: Display adapter problem (MDA, CGA) 1 long, 3 short beeps: Enhanced Graphics Adapter problem (EGA) 3 long beeps: 3270 keyboard card error

  5. Function key - Wikipedia

    en.wikipedia.org/wiki/Function_key

    As a result, default mappings are sometimes wrong (i.e., not matching the labels shown on the keyboard) when using a recent USB Apple keyboard on an older version of Mac OS X, which doesn't know about the new function key mapping of this keyboard (e.g., because Mission control and Launchpad didn't exist at that time, the corresponding labels ...

  6. Fn key - Wikipedia

    en.wikipedia.org/wiki/Fn_key

    The majority of portable computer manufacturers today (including HP, Dell, and Samsung) currently place the Fn key between the left Control key and the left Windows key, making it the second key from the left on the bottom row of the keyboard. This usually means that the Control key is reduced in size, but allows it to remain in the lowest-left ...

  7. ACPI - Wikipedia

    en.wikipedia.org/wiki/ACPI

    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.

  8. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    The switches are then connected to each other by a pair of wires called "travelers" (or "strappers" in the UK), and the lamp is connected to the common terminal of the second switch, as shown. Using the traveler system, there are four possible permutations of switch positions: two with the light on and two with the light off.

  9. Keyboard matrix circuit - Wikipedia

    en.wikipedia.org/wiki/Keyboard_matrix_circuit

    A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected by a grid of wires, similar to a diode matrix. For example, 16 wires arranged in 8 rows and 8 columns can connect 64 keys—sufficient for a full five octaves of range (61 notes).