<s>
INT	B-Device
16h	I-Device
,	O
INT	B-Device
16H	I-Device
or	O
INT	O
22	O
is	O
shorthand	O
for	O
BIOS	B-Operating_System
interrupt	O
call	O
16hex	O
,	O
the	O
23rd	O
interrupt	O
vector	O
in	O
an	O
x86-based	O
computer	O
system	O
.	O
</s>
<s>
The	O
BIOS	B-Operating_System
typically	O
sets	O
up	O
a	O
real	O
mode	O
interrupt	O
handler	O
at	O
this	O
vector	O
that	O
provides	O
keyboard	O
services	O
.	O
</s>
<s>
To	O
adapt	O
the	O
coding	O
of	O
the	O
INT	B-Device
16h	I-Device
to	O
another	O
type	O
of	O
keyboard	O
(	O
for	O
example	O
,	O
an	O
international	O
keyboard	O
)	O
,	O
the	O
code	O
must	O
analyze	O
the	O
scan-code	O
of	O
the	O
key	O
pressed	O
,	O
and	O
then	O
perform	O
suitable	O
interpreting	O
.	O
</s>
<s>
For	O
keyboards	O
with	O
101	O
letters	O
or	O
more	O
,	O
there	O
are	O
some	O
keys	O
that	O
INT	B-Device
16h	I-Device
interprets	O
as	O
expanded	O
keys	O
,	O
which	O
have	O
a	O
scan-code	O
that	O
is	O
different	O
from	O
normal	O
keys	O
(	O
e.g.	O
,	O
key	O
pause	O
)	O
.	O
</s>
