Syntax Syntax: MSCDEX.EXE /D:x /M:n /E /V /L:x /S /K
| /D:Device name | Allows you to specify the name for the driver. This must be identical to the device name in the Config.sys file. Usually MSCD0001 is commonly used. |
| /M:<n> | Specifies the number of sector buffers to cache the path table of a CD-ROM disk. Typically, each drive should have four to five buffers. The larger this number is, the less your computer will read directly from the CD-ROM drive. |
| /E | Tells MSCDEX.exe to use expanded memory. |
| /V | Displays information on memory usage when you boot your PC. |
| /L:<drive letter> | Specifies the letter you wan to assign the first CD-ROM drive. Such as D: |
| /S | Allows the CD-ROM to be shared on MS-NET based systems. |
| /K (Japanese) | Tells MSCDEX.EXE to use any KANJI file structures, if present rather than the default of alphanumeric file structures. |
Extra Notes: When loading the MSCDEX line in Windows 3.x that you specify the LASTDRIVE= statement, such as LASTDRIVE=Z Examples Below is an example of how the MSCDEX line should look in your autoexec.bat: LH C:\WINDOWS\COMMAND\MSCDEX.EXE /D:MSCD001 Remember that the above example, if used, must have the same device driver name as the CD-ROM driver in the config.sys. Additional information about the autoexec.bat / config.sys can be found on our autoexec.bat / config.sys page.
Additional information about loading MS-DOS CD-ROM drivers can be found on our CD-ROM drivers page. Errors and issues When booting I receive message "MSCDEX is already running" and if I continue, all programs will stop running. It is likely that you have more than one MSCDEX statement in your autoexec.bat. Edit the autoexec.bat and place a
REM in front of one of the MSCDEX lines in the autoexec.bat. Additional information about editing the autoexec.bat can be found on our autoexec.bat / config.sys page. | 
