Is Bios Updated When Any External Device Attached/removed ?

[lovelylinux]

Hi to all,
I am the new user to Linux.
I want to know IS BIOS UPDATED WHEN ANY EXTERNAL DEVICE ATTACHED/REMOVED ?
Actually my task is to detect whether any USB device is attached or removed at runtime.
But I dont want to use /proc file.
I want to know the exact route that How interrupt is generated when external device , suppose USB , attached and what is interrupt routine.
If the interrupt is directly affect the BIOS and then from BIOS OS is updated , I want to catch the interrupt from the BIOS and then from the BIOS information I want the my running application catch the information about USB detection and update the alert regarding to it.
So, Pls tell me that if BIOS is updated at runtime or not ?????
Any good suggestion is appriciated...
Thanks.

[Javasnob]

Unless you're planning on writing your own kernel, I don't think you really want to bother with the BIOS. The kernel handles hardware detection, so you don't have to deal with the messy details.

[lovelylinux]

Unless you're planning on writing your own kernel, I don't think you really want to bother with the BIOS. The kernel handles hardware detection, so you don't have to deal with the messy details.

How kernel detects hardware ?
Pls give details.

[Javasnob]

I don't know exactly how it detects hardware, but I would guess it gets an interrupt from the hardware and responds to it. kernel.org has the kernel source; you can find out exactly how they do it by reading the source.