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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).
The xAPIC was introduced with the Pentium 4, while the x2APIC is the most recent generation of the Intel's programmable interrupt controller, introduced with the Nehalem microarchitecture in November 2008. [17] The major improvements of the x2APIC address the number of supported CPUs and performance of the interface.
Spurious wakeups usually happen because in between the time when the condition variable was signaled and when the awakened thread was finally able to run, another thread ran first and changed the condition again.
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
Using a calm, respectful tone and waiting for the appropriate moment to interrupt is key to using this statement in a polite way. It also leaves little question about your intent.
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An interrupt control register, or ICR, is a hardware register in a computer chip used to configure the chip to generate interrupts—to raise a signal on an interrupt line—in response to some event occurring within the chip or a circuit connected to the chip. [1] [2]