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IRQ stands for Interrupt ReQuest. It allows other hardware in your computer to interrupt what the CPU is doing, because there is something else that needs to be done. For example, when you press a key on your key board, an IRQ is generated that says a key has been pressed. If there were no IRQs, then the CPU would have to check the keyboard over and over again to see if a key has been pressed, which wastes time.
What else can I help you with?
What IRQ does LPT1 usually use?
LTP1 should use IRQ7.
What is the IRQ for a keyboard?
IRQ 1 is used exclusively for the keyboard controller.
What IRQ does a monitor use?
None. Its the graphics card that uses an IRQ. The monitor is just a peripheral.
What IRQ does the system timer use?
0
What IRQ does LPT2 usually use?
5
When a computer device is in need of immediate attention it sends the OS?
An interrupt request, or IRQ
What system resources does COM2 use?
IRQ 3
What type of computer resources are direct lines to the processor and used by computer componets to request attention from the CPU?
Interrupt Requests are method for handling requests from components such as Keyboard, Mouse, Clock etc & get attention of Processor.Each specific components is assigned IRQ number.
If IRQ 2 is in use IRQ 9 cant be used?
Depends if it's sharable or not. You could try moving the card to another slot.
List interrupts used with the IBM PC type sytems?
IRQ 0 - System timer. IRQ 1 - Keyboard. IRQ 2 - Cascaded signals from IRQs 8-15. IRQ 3 - COM2 (Default) and COM4 (User) serial ports IRQ 4 - COM1 (Default) and COM3 (User) serial ports IRQ 5 - LPT2 Parallel Port 2 or sound card IRQ 6 - Floppy disk controller IRQ 7 - LPT1 Parallel Port 1 or sound card (8-bit Sound Blaster and compatibles) IRQ 8 - Real time clock IRQ 9 - Free / Open interrupt / Available / SCSI. Any devices configured to use IRQ 2 will actually be using IRQ 9. IRQ 10 - Free IRQ 11 - Free IRQ 12 - PS/2 connector Mouse. IRQ 13 - ISA / Math Co-Processor IRQ 14 - Primary IDE. If no Primary IDE this can be changed IRQ 15 - Secondary IDE These are just a set of standard IRQs. For much more detail check our Ralf Brown's list located at http://www.cs.cmu.edu/~ralf/files.html
What is the IRQ for the floppy disk drive controller?
By default, the IRQ for the floppy disk controller is IRQ 6.
What is the Interrupt Request IRQ assigned to LPT1?
By default IRQ 7 is assigned to LPT1.
