Is scan code of every key fixed in all keyboard Post: 302312953

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Top Forums Programming Is scan code of every key fixed in all keyboard Post 302312953 by otheus on Monday 4th of May 2009 08:46:59 AM

05-04-2009

Registered User

For PS-2 keyboards, I think this is fixed. For USB keyboards, I believe it's possible that they can be programmed to do different things with different keys, so it's not possible to completely generalize.

Different keyboard manufacturers also produce different special keys with their own scan codes. For instance, my Microsoft keyboard has keys for volume control, a button for the calculator, and handy buttons for email, home page and search. Each of these has its own scan code, and that scan code might or might not be on another keyboard.

However, the others are almost always the same. This includes F1 through F10, as on the original PC, and maybe now F11 and F12 which have been standard since the mid-80's.

otheus

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LEARN ABOUT DEBIAN

kbdmux

KBDMUX(4)						   BSD Kernel Interfaces Manual 						 KBDMUX(4)

NAME

     kbdmux -- keyboard multiplexer

SYNOPSIS

     device kbdmux

     In /boot/device.hints:
     hint.kbdmux.0.disabled="1"

DESCRIPTION

     The kbdmux keyboard driver provides support for basic keyboard multiplexing.  It is built around the idea of a ``super keyboard''.  The
     kbdmux driver acts as a master keyboard consuming input from all slave keyboards attached to it.

     Slave keyboards can be attached to or detached from the kbdmux keyboard driver with the kbdcontrol(1) utility.

SEE ALSO

     kbdcontrol(1), atkbd(4), syscons(4), ukbd(4)

CAVEATS

     The kbdmux keyboard driver switches all slave keyboards into K_RAW mode.  Thus all slave keyboards attached to the kbdmux keyboard share the
     same state.  The kbdmux keyboard is logically equivalent to one keyboard with lots of duplicated keys.

HISTORY

     The kbdmux module was implemented in FreeBSD 6.0.

AUTHORS

     Maksim Yevmenkin <m_evmenkin@yahoo.com>

BSD
								   July 12, 2005							       BSD