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Q80301: How to Change the MS-DOS Cursor

Article: Q80301
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:2.x,3.x,4.x,5.0
Operating System(s): 
Keyword(s): 
Last Modified: 17-DEC-2000

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 2.11, 3.1, 3.2, 3.21, 3.3, 3.3a, 4.0, 4.01, 5.0 
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SUMMARY
=======

There is no way to change the appearance of the command line cursor in MS-DOS
with any MS-DOS command. The cursor is a function of the BIOS and can only be
modified through a ROM BIOS call. There are third party applications that
facilitate this, such as Norton Utilities and PC Tools. You can also access the
BIOS and modify the cursor by using the MS-DOS Debug utility.

MORE INFORMATION
================

You can write a short program to modify the MS-DOS cursor. One way to do this is
by creating and executing a short Debug script. The changes made are temporary
in memory. Therefore, if the goal is to have the cursor altered at all times, it
will be necessary to insert a line in the AUTOEXEC.BAT file to call the cursor
program on boot.

To change the appearance of the MS-DOS cursor, enter the following at the command
prompt:

Command Prompt          Enter This
--------------          ----------

C:\>                    debug <press ENTER>
-                       a100 <press ENTER>
287E:0100               mov ah,01 <press ENTER>
287E:0102               mov cx,010n <press ENTER>  (n range=1-4)
287E:0105               int 10 <press ENTER>
287E:0107               int 20 <press ENTER>
287E:0109               <press ENTER>
-                       n C:\cursor.com <press ENTER>
-                       rcx <press ENTER>
CX 0000
:                       9 <press ENTER>
-                       w <press ENTER>
Writing 00009 bytes
-                       q <press ENTER>

C:\>

Changing the value of n (1-4) will result in different appearances for the
cursor, where n=4 is a large cursor.

Insert the following line in the AUTOEXEC.BAT file to have the cursor loaded upon
booting the machine:

  c:\cursor.com

Note: This procedure relies on standard IBM ROM BIOS services and therefore
cannot be guaranteed to work on all systems. This information is only provided
as a possible solution.

The products included here are manufactured by vendors independent of Microsoft;
we make no warranty, implied or otherwise, regarding these products' performance
or reliability

Reference(s):

"The NEW Peter Norton Programmer's Guide to the IBM PC & PS/2," Microsoft
Press, 1988


Additional query words: 3.3 3.3a 3.30 3.30a 4.0 4.0a 4.00 4.00a 4.01 4.01a 5.00 noupd

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS321 kbMSDOS400 kbMSDOS320 kbMSDOS330a kbMSDOS310 kbMSDOS500 kbMSDOS330 kbMSDOS401 kbMSDOS211
Version           : MS-DOS:2.x,3.x,4.x,5.0

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