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A hardware interrupt is a condition related to the state of the hardware that may be signaled by an external hardware device, e.g., an interrupt request (IRQ) line on a PC, or detected by devices embedded in processor logic (e.g., the CPU timer in IBM System/370), to communicate that the device needs attention from the operating system (OS) [7] or, if there is no OS, from the bare metal ...
The 8259 may be configured to work with an 8080/8085 or an 8086/8088. On the 8086/8088, the interrupt controller will provide an interrupt number on the data bus when an interrupt occurs. The interrupt cycle of the 8080/8085 will issue three bytes on the data bus (corresponding to a CALL instruction in the 8080/8085 instruction set).
[3] [4] Because spurious wakeup can happen, when a thread wakes after waiting on a condition variable, it should always check that the condition it sought is still satisfied. If it is not, it should go back to sleeping on the condition variable, waiting for another opportunity. [5]
Spurious may refer to: Spurious relationship in statistics; Spurious emission or spurious tone in radio engineering; Spurious key in cryptography; Spurious interrupt in computing; Spurious wakeup in computing; Spurious, a 2011 novel by Lars Iyer
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BWV 570 – Fantasia in C major; BWV 571 – Fantasia (Concerto) in G major (spurious) BWV 572 – Fantasia in G major (Pièce d'Orgue) BWV 573 – Fantasia in C major (incomplete, from the 1722 Notebook for Anna Magdalena Bach) BWV 574 – Fugue in C minor (on a theme of Legrenzi) BWV 574a – Fugue in C minor (alternative version of BWV 574)
Time-triggered systems can be viewed as a subset of a more general event-triggered (ET) system architecture (see event-driven programming).. Implementation of an ET system will typically involve use of multiple interrupts, each associated with specific periodic events (such as timer overflows) or aperiodic events (such as the arrival of messages over a communication bus at random points in time).
Asynchronous circuit (clockless or self-timed circuit) [1]: Lecture 12 [note 1] [2]: 157–186 is a sequential digital logic circuit that does not use a global clock circuit or signal generator to synchronize its components.