8259 PIC: Difference between revisions
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Add 'See Also' section, and link to IOAPIC orphan page. |
Added section on disabling |
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''Note the presence of io_wait() calls, on older machines its necessary to give the PIC some time to react to commands as they might not be processed quickly'' |
''Note the presence of io_wait() calls, on older machines its necessary to give the PIC some time to react to commands as they might not be processed quickly'' |
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== Disabling == |
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If you are going to use the processor local APIC and the IOAPIC, you must first disable the PIC. This is done via: |
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<source lang=asm>mov al, 0xff |
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out 0xa1, al |
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out 0x21, al |
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</source> |
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== See Also == |
== See Also == |
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