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CDSETUP automatically adds an MSCDEX statement to your AUTOEXEC.BAT file. You can modify the
default MSCDEX parameters to customize your installation. This section explains the function of each
parameter. A text editor can be used to modify the MSCDEX statement in your AUTOEXEC.BAT file.
The following is the syntax of the MSCDEX.EXE entry in AUTOEXEC.BAT where
MSCDEX.EXE
specifies the location (drive and directory) of the MSCDEX.EXE file.
Do not truncate the actual device driver entry. Place the complete entry on one line in the AUTOEXEC.BAT
file. Use the following options to configure the device driver.
/D:device name specifies the name of the CD-ROM drive (eight characters maximum). This must be identical
to the device name specified in the device driver in the CONFIG.SYS file. For example:
You might support multiple CD-ROM drives (of different types) by installing each of their drivers (naming them
different names) and placing a /D:device name in the MSCDEX line for each drive. For example, if you
wanted to support an IBM IDE CD-ROM drive and an IBM SCSI CD-ROM drive, your CONFIG.SYS file could
have these statements:
and your AUTOEXEC.BAT file would have this statement:
/M:nn specifies the number of sector buffers for temporary storage of the most recent CD data. For example,
to specify 12 sector buffers you would use:
CDSETUP will set this value to 10. The default value for MSCDEX with no /M parameter is 4. The greater
this value, the better the CD-ROM drive will perform. However, each buffer uses about 2 KB of memory, and
specifying too many buffers might slow down your computer or interfere with other programs that have large
memory-usage requirements. Using expanded memory (see the /E option in this section) or loading
MSCDEX.EXE into high memory (refer to your DOS user manual or memory manager user manual) might
allow you to specify a larger number of buffers to enhance CD-ROM performance without adversely affecting
programs that have large memory-usage requirements.
/E instructs the computer to use expanded memory, if available. For example:
Note that you must first load an expanded memory device driver before using this option. If no expanded-
memory device driver is loaded, the following error message appears: Expanded Memory not present or not
usable.
/V instructs the computer to display a summary of RAM allocation and expanded memory usage at startup
time.
/L:drive letter specifies the drive letter to be assigned to the first CD-ROM drive. Do not assign a letter
already used by an existing drive or your computer will be unable to access the CD-ROM drive. For example,
you might use:
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