IRQ's
When you install an expansion board in a slot, it gets connected to the I/O bus. Now the board can send
and receive data. But who regulates the traffic? Who gives clearance to the new controller to send data? It
would appear that data traffic could soon be chaotic.
A Guide to Adapters and I/O units.
To control data traffic on the I/O bus, the concept of IRQ (Interrupt ReQuest) was created. Interrupts are a
fundamental principle in the PC design. There are two types of interrupts: Software Interrupts are used to
call any number of BIOS routines. Hardware Interrupts are the subject of this page.
When you install an expansion board in a slot, it gets connected to the I/O bus. Now the board can send
and receive data. But who regulates the traffic? Who gives clearance to the new controller to send data? It
would appear that data traffic could soon be chaotic.
A Guide to Adapters and I/O units.
To control data traffic on the I/O bus, the concept of IRQ (Interrupt ReQuest) was created. Interrupts are a
fundamental principle in the PC design. There are two types of interrupts: Software Interrupts are used to
call any number of BIOS routines. Hardware Interrupts are the subject of this page.
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