Differences between current version and predecessor to the previous major change of APIC.
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| Newer page: | version 7 | Last edited on Saturday, June 3, 2006 1:54:41 am | by AristotlePagaltzis | |
| Older page: | version 3 | Last edited on Sunday, March 14, 2004 5:19:07 am | by StuartYeates | Revert |
@@ -1,5 +1,9 @@
-[Acronym] for __A__dvanced __P__rogrammable __I__nterrupt Controller. The APIC is split into two parts, the Local APIC and the IO-APIC
.
+An
[Acronym] for __A__dvanced __P__rogrammable __I__nterrupt Controller.
-The Local
APIC is found on uniprocessor and mulitprocessor systems and built
into recent
[x86
] chips (Pentium Pro
and up). The Local APIC can be used by
the OS to program interrupts to wake up threads, on
[SMP
] machines it can be used to send interrupts to another processor. The Local
APIC also has a handy timer in it, you can set the timer to whatever you want and it'll start generating interrupts
.
+The [
APIC]
is split
into two parts, the Local
[APIC
] and the [I/O
]-[
APIC]
.
-The IO-APIC is only really useful for [SMP] systems. It is used for sending various interrupts to various [CPU]s in the system. Without an IO
-APIC interrupts from hardware only get delivered to the boot [CPU]. Another advantage is that [PCI] interrupts can be sent around the system without overlapping [IRQ]s.
+The Local [APIC] is found on uniprocessor and mulitprocessor systems and built into recent [x86] chips (Pentium Pro and up). The Local [APIC] can be used by the OperatingSystem to program interrupts to wake up threads, on [SMP] machines it can be used to send interrupts to another processor. The Local [APIC] also has a handy timer in it, you can set the timer to whatever you want and it'll start generating interrupts.
+
+
The IO-APIC is only really useful for [SMP] systems. It is used for sending various interrupts to various [CPU]s in the system. Without an [I/O]
-[
APIC],
interrupts from hardware only get delivered to the boot [CPU]. Another advantage is that [PCI] interrupts can be sent around the system without overlapping [IRQ]s.
+
+See also: [Intel]’s [APIC notes | http://www.intel.com/design/chipsets/datashts/290566.htm]
