CD-ROM Driver

To install an IDE compatible CD-ROM drive for use with REAL/32 you must first have the appropriate driver for DOS. Install this driver in accordance with the manufacturer's instructions.

Normally the DOS CD-ROM drivers are installed via the DOS file config.sys. When a reference to config.sys is made within your CD-ROM installation guide, make changes to the appropriate mconfig.sys file.

The line in the config.sys file that loads the driver is usually something like:

DEVICE=C:\<path>\<drivername.sys> /D:MSCD0001



This line must be copied to the end of the REAL/32 configuration file mconfig.sys.

Reboot to allow this driver to take effect.


To access the CD-ROM from the REAL/32 command line you must run the IMSCDEX CD-ROM extension program. 

Note MSCDEX will not operate correctly with REAL/32, the file required is imscdex.exe, found in the C:\REAL32\BIN directory.

This program defines which drive letter you wish to use as a CD drive. IMSCDEX has the following syntax:

IMSCDEX [/?|H] /D:drivename1 [/D:drivename2...] [/E] [/F:n] [/L:drive] [/M:n] [/V]


DEVICE = C:\(Your Driver.sys)/D:(Device driver name)


Provides multi-user / multitasking access to CD-ROM drives. IMSCDEX can be loaded from your autoexec.bat file or from the command line. (The device driver that came with your CD-ROM drive must be loaded from your mconfig.sys file).

Command switches

/? or /H                        Displays help text.

/D:drivename1 [/D:drivename2]

Specifies the driver name of the first CD-ROM device driver. The drivename1 parameter must match the /D parameter specified in the mconfig.sys file for the driver.

The IMSCDEX command must include at least one /D switch

To install additional CD-ROM device drivers, specify an additional /D switch for each driver.

[/E] Specifies that the CD-ROM driver will be allowed to use Expanded memory (LIM EMS), if available, to store buffers.

[/F:n] number of file handles to allocate (the default is 20).

[/L:drive] specifies the drive letter to assigned to the first CD-ROM drive. Additional drives, if installed, are allocated sequential drive letters.

[/M:n] number of sector buffers to allocate (the default is 14).

[/V] Print out debug information during initialization


To configure a Hitachi CD-ROM driver add to mconfig.sys:


Then run the TSR program from the command line.


Note.  This driver does not support any write functions that a CD drive may be capable of.
This driver does not support .cmd programs

Defining Which Sessions May Access The CD-ROM

If you wish the CD-ROM drive to be active in all sessions, type the following as the last line in the autoexec.bat file:


If you only require the CD-ROM drive to be active in the first DOS session of every physical console, type the following as the last line in the autoexec.bat file:


If you only wish to load the CD-ROM drive in the first DOS session of your main screen (i.e. the server), type the following as the last line in the autoexec.bat file:


Copyright 1997-2002 Intelligent Micro Software. All rights reserved. Information in this document is subject to change without notice. Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.
Last modified: Monday November 25, 2002.