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CD-ROM can provide data. This parameter is usually not required in most
computers.
n is a relative timing parameter that depends on processor speed. When the
value of n increases, the drive data-transfer rate decreases. Valid values for n
are 0 through 99. The default for n is 0, and the /T parameter is not required.
/I:n
This parameter enables interrupt sharing. If n=1, interrupt sharing is enabled.
If n=0, interrupt sharing is disabled. The default value is 0. Set this parameter
to enabled when the IDE interrupt must be shared with another device.
Using Microsoft CD-ROM Extensions
Microsoft CD-ROM Extensions (MSCDEX.EXE) is an executable program that works
in conjunction with the device driver (IBMIDECD.SYS) to enable your computer to
read CDs as DOS-formatted disks. MSCDEX is designed for DOS and Windows.
The CDSETUP program 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
[drive:][path]MSCDEX.EXE specifies the location (drive and directory) of the
MSCDEX.EXE file.
[drive:] [path]MSCDEX.EXE /D:device name
[/M:n] [/E] [/V] [/L:drive letter]
[/K][/S]
(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
This parameter specifies the name of the CD-ROM drive (eight characters
maximum). This name must be identical to the device name specified in the
device driver in the CONFIG.SYS file. For example:
C:\MSCDEX.EXE /D:IBMCD1
You might support multiple CD-ROM drives (of different types) by installing
each of their device 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 might have these statements:
DEVICE=C:\IBMIDECD.SYS /D:IDE_CD
DEVICE=C:\IBMCDROM.SYS /D:SCSI_CD
and your AUTOEXEC.BAT file could include this statement:
C:\MSCDEX /D:IDE_CD /D:SCSI_CD
Part 2: Appendixes 2-15