Mikroprozessortechnik - Interrupt, Pentium-Fdiv-Bug, Protected Mode, Real Mode, Simultaneous Multithreading, Virtual 8086 Mode (English, German, Paperback)

Kapitel: Interrupt, Pentium-Fdiv-Bug, Protected Mode, Real Mode, Simultaneous Multithreading, Virtual 8086 Mode, Low-Voltage-Prozessor, Cool'n'quiet, 3dnow, System Management Mode, Pentium-F00f-Bug, Longrun, Sudden Northwood Death Syndrome, Verarbeitungsbreite, Performance Counter. Aus Wikipedia. Nicht dargestellt. Auszug: In computing, an interrupt is an asynchronous signal indicating the need for attention or a synchronous event in software indicating the need for a change in execution. A hardware interrupt causes the processor to save its state of execution and begin execution of an interrupt handler. Software interrupts are usually implemented as instructions in the instruction set, which cause a context switch to an interrupt handler similar to a hardware interrupt. Interrupts are a commonly used technique for computer multitasking, especially in real-time computing. Such a system is said to be interrupt-driven. An act of interrupting is referred to as an interrupt request (IRQ). Hardware interrupts were introduced as a way to avoid wasting the processor's valuable time in polling loops, waiting for external events. They may be implemented in hardware as a distinct system with control lines, or they may be integrated into the memory subsystem. If implemented in hardware, an interrupt controller circuit such as the IBM PC's Programmable Interrupt Controller (PIe may be connected between the interrupting device and the processor's interrupt pin to multiplex several sources of interrupt onto the one or two CPU lines typically available. If implemented as part of the memory controller, interrupts are mapped into the system's memory address space. Interrupts can be categorized into: maskable interrupt, non-maskable interrupt (NMI), inter-processor interrupt (IPI), software interrupt, and spurious interrupt. Processors typically have an internal interrupt mask which allows software to ignore all external hardware interrupts whi...http://booksllc.net/?l=de