About how keyboard input character route to the tty?

From: Chen Bin (sunwen_ling_at_tom.com)
Date: 02/27/04 

Date: 26 Feb 2004 19:22:47 -0800

Hi,

I am very curious how our keyboard strike is transferred to the
console and finally displayed in our screen.

I know there is no keyboard entry in /dev/input directory,and there is
a input subsystem in the kernel.In keyboard.c,

static struct input_handler kbd_handler = {
        .event = kbd_event,
        .connect = kbd_connect,
        .disconnect = kbd_disconnect,
        .name = "kbd",
        .id_table = kbd_ids,
};

will be registered to the input subsystem.

I know when we press a key,there will be an interrupt raise to our
CPU,and we go to keyboard registers to read the scan code.But I can't
found where the IRQ is set up to keyboard interrupt handler.

I think it is not a simple relationship between keyboard and console.

Any help appreciated!!

Chen Bin

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