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Old 05-01-2003, 09:57 AM   #1
slackerbie
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Registered: Apr 2003
Location: Holland
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Unhappy IRQ and I/O tutorial / howto?


Hi,

I've been posting a few questions about hardware and Linux. Within the answers that I get people almost always seem to talk about the I/O and IRQ of the devices

I have a fained idea about what this all means and does, but Iwould really like to learn more about them.

Any suggestions for helpfull sites?

Thnx
 
Old 05-13-2003, 07:25 AM   #2
vladkrack
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Registered: Oct 2002
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Try:

http://www.linuxdoc.com/index.lxp?lx...ardware%2ehtml

Hope that helps ...
 
Old 05-13-2003, 10:10 AM   #3
michaelk
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Registered: Aug 2002
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In a nutshell:

IRQ - interrupt request
The most common ways for peripherals to say I have something for the CPU is either for the CPU to poll every device and ask. Which takes valuable time away from the CPU. Or have the device send a signal to the CPU saying I got something to say.

There are 15 interrupts some are dedicated and some are shared between devices.


I/O

I/O is memory that is used for actually transfering data between the device and the CPU.

http://www.millbury.k12.ma.us/~hs/techrepair/IRQ.html
 
  


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