About: Interrupt request (PC architecture)

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In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead. Hardware interrupts are used to handle events such as receiving data from a modem or network card, key presses, or mouse movements. During the early years of personal computing, IRQ management was often of user concern. With the introduction of plug and play devices this has been alleviated through automatic configuration.

Attributes	Values
rdf:type	broadcaster
rdfs:label	Interrupt request (PC architecture) (en)
rdfs:comment	In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead. Hardware interrupts are used to handle events such as receiving data from a modem or network card, key presses, or mouse movements. During the early years of personal computing, IRQ management was often of user concern. With the introduction of plug and play devices this has been alleviated through automatic configuration. (en)
sameAs	Interrupt request (PC architecture) Interrupt request (PC architecture)
dbp:wikiPageUsesTemplate	dbt:Cite_book dbt:Div_col dbt:Div_col_end dbt:ISBN dbt:More_footnotes dbt:Reflist dbt:Short_description dbt:Snd dbt:Outofdate
Subject	Interrupts
gold:hypernym	Signal
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Interrupt_request_(PC_architecture)?oldid=1068991240&ns=0
Wikipage page ID	2532446 (xsd:integer)
page length (characters) of wiki page	9968 (xsd:nonNegativeInteger)
Wikipage revision ID	1068991240 (xsd:integer)
Link from a Wikipage to another Wikipage	Floating-point unit Floppy-disk controller Programmable interrupt controller Programmable interval timer X86 Addison-Wesley Advanced Configuration and Power Interface Advanced Programmable Interrupt Controller BIOS Universal asynchronous receiver-transmitter COM (hardware interface) Interrupts Message Signaled Interrupts PCI Express PS/2 port Serial port Tux Plug and play Sound card Computer Computer keyboard Computer mouse Coprocessor Microsoft Windows Operating system Optical disc drive Parallel ATA Parallel port Peripheral Component Interconnect IBM PC compatible System Information (Windows) Device Manager Expansion card Hard disk drive Industry Standard Architecture Input/output base address Intel 8259 Inter-processor interrupt Interrupt Interrupt handler Interrupt request (PC architecture) Modem MPU-401 Network interface controller Polling (computer science) Clock generator
has abstract	In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead. Hardware interrupts are used to handle events such as receiving data from a modem or network card, key presses, or mouse movements. Interrupt lines are often identified by an index with the format of IRQ followed by a number. For example, on the Intel 8259 family of Programmable Interrupt Controllers (PICs) there are eight interrupt inputs commonly referred to as IRQ0 through IRQ7. In x86 based computer systems that use two of these PICs, the combined set of lines are referred to as IRQ0 through IRQ15. Technically these lines are named IR0 through IR7, and the lines on the ISA bus to which they were historically attached are named IRQ0 through IRQ15 (although historically as the number of hardware devices increased, the total possible number of interrupts was increased by means of cascading requests, by making one of the IRQ numbers cascade to another set or sets of numbered IRQs, handled by one or more subsequent controllers). Newer x86 systems integrate an Advanced Programmable Interrupt Controller (APIC) that conforms to the Intel APIC Architecture. These APICs support a programming interface for up to 255 physical hardware IRQ lines per APIC, with a typical system implementing support for only around 24 total hardware lines. During the early years of personal computing, IRQ management was often of user concern. With the introduction of plug and play devices this has been alleviated through automatic configuration. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Interrupt_request_(PC_architecture)
is Wikipage redirect of	Interrupt Request Level Interrupt Request Interrupt request IRQ conflict Irq INTR
is Link from a Wikipage to another Wikipage of	Floppy-disk controller NTLDR Ntoskrnl.exe Interrupt Request Level ARM architecture family Apple II COM (hardware interface) Legacy Plug and Play DIP switch Hyper-threading Linux startup process Commodore Datasette Computer program List of computing and IT abbreviations End of interrupt Ensoniq AudioPCI GT-Power Graphics Core Next IBM PC compatible IBM Personal Computer/AT IRQ IRQL IRQL (Windows) Incremental encoder Extended Industry Standard Architecture Extended System Configuration Data

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