This article describes how to create MS-DOS-based programs to toggle the
CAPS LOCK and NUM LOCK keys on and off.
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To Toggle the CAPS LOCK Key On
| 1. | Use any text editor (such as Notepad) to create the following file:
a 100
mov ax,0040
mov ds,ax
or byte ptr [0017],40
mov ah,1
int 16
mov ax,4c00
int 21
r cx
0013
n CAPS_ON.COM
w
q
|
| 2. | Save the file as Capson.deb
|
| 3. | Type the following line at a command prompt:
debug < capson.deb
This creates an MS-DOS-based program named Caps_on.com that toggles
the CAPS LOCK key on.
|
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To Toggle the CAPS LOCK Key Off
| 1. | Use any text editor (such as Notepad) to create the following file:
a 100
mov ax,0040
mov ds,ax
and byte ptr [0017],bf
mov ah,1
int 16
mov ax,4c00
int 21
r cx
0013
n CAPS_OFF.COM
w
q
|
| 2. | Save the file as Capsoff.deb
|
| 3. | Type the following line at a command prompt:
debug < capsoff.deb
This creates an MS-DOS-based program named Caps_off.com that toggles
the CAPS LOCK key off.
|
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To Toggle the NUM LOCK Key On
| 1. | Use any text editor (such as Notepad) to create the following file:
a 100
mov ax,0040
mov ds,ax
or byte ptr [0017],20
mov ah,1
int 16
mov ax,4c00
int 21
r cx
0013
n NUM_ON.COM
w
q
|
| 2. | Save the file as Numon.deb
|
| 3. | Type the following line at a command prompt:
debug < numon.deb
This creates an MS-DOS-based program named Num_on.com that toggles
the NUM LOCK key on.
|
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To Toggle the NUM LOCK Key Off
| 1. | Use any text editor (such as Notepad) to create the following file:
a 100
mov ax,0040
mov ds,ax
and byte ptr [0017],df
mov ah,1
int 16
mov ax,4c00
int 21
r cx
0013
n NUM_OFF.COM
w
q
|
| 2. | Save the file as Numoff.deb
|
| 3. | Type the following line at a command prompt:
debug < numoff.deb
This creates an MS-DOS-based program named Num_off.com that toggles
the NUM LOCK key off.
|
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Using the Toggle Programs
Place the appropriate command in the Autoexec.bat or Config.sys file to
automatically toggle the keys you want. For example, adding
NUMLOCK=OFF
-or-
NUMLOCK=ON
to the Config.sys file will turn off or turn on the NUM LOCK key.
NOTE: You must be using MS-DOS version 6.x or later. This function was
retained in Windows 95.
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