MS-DOS Device Drivers
(c) Copyright Microsoft Corporation, 1998
This document provides complementary or late-breaking
information to supplement the Microsoft Windows 98
How to Use This Document
To view Msdosdrv.txt on-screen in Notepad, maximize
the Notepad window.
To print Msdosdrv.txt, open it in Notepad or another
word processor, and then on the File menu, click Print.
In syntax lines, except where noted, lowercase text
signifies replaceable parameters and uppercase text
signifies text that must be typed as it appears.
NOTE: The Config.txt file contains more Help for MS-DOS
commands. In addition, you can type the name of the
command at the command prompt, followed by a slash and
question mark (/?). For example: CHKDSK /?
If you have the Windows 98 CD, you can get additional
help on MS-DOS commands, including syntax and examples.
You can load the MS-DOS 6.0 help file by browsing the
oolsoldmsdos folder, and then clicking Help.
DBLBUFF.SYS – DOUBLE BUFFERING
NOTE: In this section, uppercase letters in syntax
and ANSI escape sequences indicate text you must type
exactly as it appears.
ANSI.SYS defines functions that change display graphics,
controls cursor movement, and reassigns keys. The
ANSI.SYS device driver supports ANSI terminal emulation
of escape sequences to control your system’s screen and
This device driver must be loaded by a DEVICE or
DEVICEHIGH command in your CONFIG.SYS file.
DEVICE=drive:pathANSI.SYS /X /K /R
Specifies the location of the ANSI.SYS file.
Remaps extended keys independently on 101-key
Causes ANSI.SYS to treat a 101-key keyboard like
an 84-key keyboard. It is equivalent to the command
SWITCHES=/K. If you usually use the SWITCHES=/K
command, you will need to use the /K switch with
Adjusts line scrolling to improve readability when
ANSI.SYS is used with screen-reading programs (which
make computers more accessible to people with
Parameters used in ANSI escape sequences:
Numeric parameter. Specifies a decimal number.
Selective parameter. Specifies a decimal number
that you use to select a function. You can specify
more than one function by separating the parameters
with semicolons (;).
Line parameter. Specifies a decimal number that
represents one of the lines on your screen or on
Column parameter. Specifies a decimal number that
represents one of the columns on your screen or on
ANSI escape sequences for cursor movement, graphics, and
In the following list of ANSI escape sequences, the
abbreviation ESC represents the ASCII escape character
27 (1Bh), which appears at the beginning of each escape
Cursor Position: Moves the cursor to the specified
position (coordinates). If you do not specify a
position, the cursor moves to the home position–the
upper-left corner of the screen (line 0, column 0).
This escape sequence works the same way as the following
Cursor Position escape sequence.
Cursor Position: Works the same way as the preceding
Cursor Position escape sequence.
Cursor Up: Moves the cursor up by the specified number
of lines without changing columns. If the cursor is
already on the top line, ANSI.SYS ignores this sequence.
Cursor Down: Moves the cursor down by the specified
number of lines without changing columns. If the cursor
is already on the bottom line, ANSI.SYS ignores this
Cursor Forward: Moves the cursor forward by the
specified number of columns without changing lines.
If the cursor is already in the far right column,
ANSI.SYS ignores this sequence.
Cursor Backward: Moves the cursor backward by the
specified number of columns without changing lines. If
the cursor is already in the far left column, ANSI.SYS
ignores this sequence.
Save Cursor Position: Saves the current cursor position.
You can move the cursor to the saved cursor position by
using the Restore Cursor Position sequence.
Restore Cursor Position: Returns the cursor to the
position stored by the Save Cursor Position sequence.
Erase Display: Clears the screen and moves the cursor
to the home position (line 0, column 0).
Erase Line: Clears all characters from the cursor
position to the end of the line (including the character
located at the cursor position).
Set Graphics Mode: Calls the graphics functions specified
by the following values. These specified functions remain
active until the next occurrence of this escape sequence.
Graphics mode changes the colors and attributes of text
(such as bold and underline) displayed on the screen.
0All attributes off
4Underscore (on monochrome display adapter only)
7Reverse video on