IRQ

created by airborne

(thing) by hotthamir (54.1 min) (print) ? (I like it!) Thu Dec 20 2001 at 4:13:26

IRQ is an abreviated computer term short for Interupt Request.

CPU does its computing cycles until a device like a printer or sound card or network adapter interupt the CPU so that the CPU gives its attention and cycles to what the device is asking for.

There are 16 IRQ Channels in every motherboard. Below is the standard layout of each IRQ channel:

IRQ 0 System Timer
IRQ 1 Keyboard
IRQ 2 Cascade to IRQ 9
IRQ 3 Com 2&4 (mouse)
IRQ 4 Com 1&3 (modem)
IRQ 5 LPT 2 (but usually Sound Card )
IRQ 6 Floppy drive
IRQ 7 LPT Port 1 (Printer)
IRQ 8 Real time clock
IRQ 9 VGA, NIC (redirect to IRQ 2)
IRQ 10 CD ROM Drive
IRQ 11 Open
IRQ 12 Open (Bus mouse port)
IRQ 13 Math co-processor
IRQ 14 IDE Controller (hard disk drive)
IRQ 15 PCI/ISA Bridge (motherboard)

see also ports & DMA.

printable version
chaos

IRQ conflict	TLA	DMA	Interrupt 16
interrupt	Software that tries to work in situations it cannot control will inevitably fail	ICQ	IRC
Disable ACPI in Windows 2000	I am the God of Static Electricity and Vibrators	Cascade	2A03
GUI	Ancient Scottish tradition of basing your food on a dare	HAL	hardware
Good Thing	SIMM	port	HardSID
VGA	100% soundblaster compatible	modem	Division Algorithm

Y'know, if you log in, you can write something here, or contact authors directly on the site. Create a New User if you don't already have an account.

Login
Password

remember me
password reminder
register

Everything2 Help

Little presents from the Node Fairy:
Barbed wire
race car
Everything you just read is bullshit
Sealand
Steal This Book
Paradise Lost
laughter
Ambush patrol
SKS
Measurements based on the human body
Nobel Prize in Literature
courage and a crowbar
Tom Waits

The Jacket
Words of Advice	(idea)
keepinitreal
Why buy the cow when you can get the milk for free?	(idea)
John_Fox
Good Intentions Gone Wrong	(person)
Cuckowski
Slavonic Princess	(poetry)
Heitah
Posthumous Oscar	(thing)
ignis_glaciesque
University of South Florida	(place)
ignis_glaciesque
Flogstaskriket	(idea)
liveforever
Caesar's last breath	(idea)
dagnyswaggart
she wants to believe	(personal)
antigravpussy
he doesn't know, but her eyes widen too far	(thing)
dagnyswaggart
Wild tides guard her secrets	(poetry)
Lord Brawl
Caesar's last breath	(poetry)
locke baron
Forgotten things in space	(fiction)
sitaraika
Colours	(idea)
etouffee
Wild tides guard her secrets	(poetry)

Everything 2 is brought to you by the letter C and The Everything Development Company