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  2. High Precision Event Timer - Wikipedia

    en.wikipedia.org/wiki/High_Precision_Event_Timer

    The High Precision Event Timer (HPET) is a hardware timer available in modern x86-compatible personal computers. Compared to older types of timers available in the x86 architecture, HPET allows more efficient processing of highly timing-sensitive applications, such as multimedia playback and OS task switching .

  3. Programmable interval timer - Wikipedia

    en.wikipedia.org/wiki/Programmable_Interval_Timer

    The Intel 8253 PIT was the original timing device used on IBM PC compatibles.It used a 1.193182 MHz clock signal (one third of the color burst frequency used by NTSC, one twelfth of the system clock crystal oscillator, [1] therefore one quarter of the 4.77 MHz CPU clock) and contains three timers.

  4. Standard Commands for Programmable Instruments - Wikipedia

    en.wikipedia.org/wiki/Standard_Commands_for...

    Rear-panel of Rigol DS1074Z digital oscilloscope showing USB-B and Ethernet connectors that accept remote SCPI commands. [ 2 ] The Standard Commands for Programmable Instruments ( SCPI ; often pronounced "skippy") defines a standard for syntax and commands to use in controlling programmable test and measurement devices, such as automatic test ...

  5. Host controller interface (USB, Firewire) - Wikipedia

    en.wikipedia.org/wiki/Host_controller_interface...

    Open Host Controller Interface (OHCI) [1] is an open standard.. Die shot of a VIA VT6307 Integrated Host Controller used for IEEE 1394A communication. When applied to an IEEE 1394 (also known as FireWire; i.LINK or Lynx) card, OHCI means that the card supports a standard interface to the PC and can be used by the OHCI IEEE 1394 drivers that come with all modern operating systems.

  6. Watchdog timer - Wikipedia

    en.wikipedia.org/wiki/Watchdog_timer

    A watchdog timer (WDT, or simply a watchdog), sometimes called a computer operating properly timer (COP timer), is an electronic or software timer that is used to detect and recover from computer malfunctions. [1]

  7. FaceTime - Wikipedia

    en.wikipedia.org/wiki/FaceTime

    If a second user called and the user answered, the video chat with the previous user would end and a new video session began with the second caller. In iPhone, if a phone call was pending and the user attempts to answer, the video call ends and the phone call began with the next user.

  8. HP-41C - Wikipedia

    en.wikipedia.org/wiki/HP-41C

    The HP-41C series are programmable, expandable, continuous memory handheld RPN calculators made by Hewlett-Packard from 1979 to 1990. The original model, HP-41C, was the first of its kind to offer alphanumeric display capabilities. Later came the HP-41CV and HP-41CX, offering more memory and functionality.

  9. Intel 8253 - Wikipedia

    en.wikipedia.org/wiki/Intel_8253

    In PC compatibles, Timer Channel 0 is assigned to IRQ-0 (the highest priority hardware interrupt). Timer Channel 1 is assigned to DRAM refresh (at least in early models before the 80386). Timer Channel 2 is assigned to the PC speaker. The Intel 82c54 (c for CMOS logic) variant handles up to 10 MHz clock signals. [1]

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