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/S
This parameter instructs MSCDEX.EXE to allow networked computers to share
CD-ROM drives.
Conserving DOS conventional memory
If the CD-ROM drive-support software is loaded in DOS conventional memory (below
640 KB RAM), there might be insufficient memory to run some DOS applications.
The CDSETUP program attempts to load the IDE CD-ROM drive device driver and
MSCDEX into upper memory, when possible, to avoid this problem.
For more information on techniques to conserve conventional memory, refer to the
following topics in the documentation that comes with your operating system:
DOS=UMB, DOS=HIGH,UMB (CONFIG.SYS entry)
This command enables the use of upper memory and loads DOS, MSCDEX, and
the IDE CD-ROM device driver in upper memory.
HIMEM.SYS (CONFIG.SYS entry)
This is a device driver that manages extended memory (RAM memory above 1
MB). Windows automatically loads this device driver.
EMM386.EXE (CONFIG.SYS entry)
This is a device driver that allows the extended memory made available by
HIMEM.SYS to be used as expanded memory. The MSCDEX /E parameter
might be used in conjunction with this device driver to move the cache allocated
by MSCDEX into this memory, thus freeing some conventional memory.
MEM /C /P (use from DOS prompt)
This is a useful DOS utility that will display the current memory allocation in
your computer to help you understand where device drivers and programs are
located. To display the MEM parameters available, at the DOS prompt type
mem/?
Enhancing performance in DOS and Windows
The following two procedures can enhance CD-ROM drive performance.
1. Allocate more MSCDEX cache (see /M parameter for MSCDEX).
2. Allow SMARTDRV to cache CD-ROM accesses.
The CDSETUP program disables the cache CD-ROM data function. Multisession
CDs are not compatible with the SMARTDRV caching method. If you do not
plan to use PhotoCD or multiple-session CDs, you can enable caching by
removing the /U parameter from the SMARTDRV line in your AUTOEXEC.BAT
or CONFIG.SYS file. This might improve the performance of some CD-ROM
applications. You must have SMARTDRV 5.0 or later to cache CD-ROM data.
Part 2: Appendixes 2-17