Re^2: CD-ROM unter DOS 6
anbei Dok, Gruss Reinhard
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<< Comments on "Device Driver & Utilities for MODEL:CDU55D & E Ver. 1.1" >>
1) Comments:
* This floppy disk contains an installation software now.
* MSCDEX is not included because of licensing agreement with Microsoft.
MSCDEX.EXE is now included in DOS 6.x, but also it is possible to
download from Microsoft BBS.
* Please make sure to copy MSCDEX.EXE under "C:\DOS", then execute
"INSTALL.EXE".
* This floppy disk contains the following files
1) Device Driver : ATAPI_CD.SYS 2.16b
2) Install.Exe : INSTALL.EXE 1.00a
3) Utility : EJECT.COM
4) Ditto : LOCK.COM
5) Ditto : UNLOCK.COM
6) Ditto : CDPLAY.EXE
7) Ditto : LOAD.EXE
8) Ditto : README.TXT
2) Installation
After installation using "INSTALL.EXE", the following lines are
added in "Config.sys" and "Autoexec.bat", which are....
< CONFIG.SYS >
Device=C:\DEV\ATAPI_CD.SYS /D:mscd000 /i:0
< AUTOEXEC.BAT >
C:\DOS\MSCDEX.EXE /D:mscd000 /V /M:12
3) Option for the device driver, ATAPI_CD.SYS
a) /D:<device_name>
* Device driver needs to have a <device_name> listed on the command
line to MSCDEX following the /D: switch. MSCDEX uses this parameter
to locate device driver. Names used must match those used for the
/D:<device_name> parameters for each device entry in "AUTOEXEC.BAT".
* The installation software specify the device name as "mscd000",
which appear in "CONFIG.SYS" as well as "AUTOEXEC.BAT".
b) /I:n
* This option is related "Media Change Command" and "Illegal
disc change" specified in MSCDEX specification. This is required
to notify the system that disc has been changed so that this
information can be used in various ways. For example, initialize
a buffer memory with directory information, etc.
On the other hand, there are several ways in treating this
information. Therefore, we added an option "/i:n" so that
user can choose an appropriate setting.
* No option at all.
Without this option, the drive returns "illegal media change",
if the drive tries to access CD-ROM without disc in the drive,
which will be, in turn, expressed as "Not ready error reading.."
and displayed on the screen.
This will not be cleared once, even after a CD-ROM disc is
inserted, but second retry will clear this message.
* n=0
Our installation software will set this option, because we feel
this is more natural than default setting which is specified by
MSCDEX specification.
Note : Some major SCSI products vendors have this setting as
their default setting.
* n=1
The driver will keep returning "Media Change Status" until
"Media Change Command (A command which is to check if the media
is changed or not) is executed. During this stage, the system
will keep displaying the following message on the screen, even
after a media is loaded.
Not ready error reading drive X:
Abort, Retry, Ignore?
(* X: Drive letter of CD-ROM drive)
* /i .... Same as "/i:1"
4) Option for MSCDEX.EXE
a) /D:<device_name>
* Device driver needs to have a <device_name> listed on the command
line to MSCDEX following the /D: switch. MSCDEX uses this parameter
to locate device driver. Names used must match those used for the
/D:<device_name> parameters for each device entry in "CONFIG.SYS".
* The installation software specify the device name as "mscd000",
which appear in "CONFIG.SYS" as well as "AUTOEXEC.BAT".
b) /M:<value>
This option switch determines how many sector buffers MSCDEX allocates
when it installs itself. The larger this value is, the more sector
cache entries are available and the less MSCDEX will have to read
directly from the CD-ROM drive. So, please increase if you require
better performance, but it will take system memory space. It is
also possible to reduce the value, but the minimum of 4-5 is
recommended. If this value is too small, the drive will reread
more often which will deteriorates drive's performance.
c) /V
This is "verbose switch". /V asks MSCDEX to print additional
information about memory usage during initialization. We recommend
to set this switch.
d) Others
There are few other switches which are not set using "INSTALL.EXE".
The following explanations are given for users who need to
customize the CD-ROM system.
* /E
This is an additional switch, which tells MSCDEX to use expanded
memory if it is available.
* /L:<drive letter>
This option is prepared for some software that require a specific
drive letter for the CD-ROM drive so that the application software
can treat CD-ROM drive without any problem.
Because "INSTALL.EXE" does not set this switch, you will have to
edit your AUTOEXEC.BAT file if this switch is needed. For example,
the following assigns CD-ROM drives starting at drive letter L:,
you need to add switch "L" as you can see as follow.
MSCDEX /D:MSCD001 /L:L
* /K
The /K switch causes MSCDEX to look for a Supplementary Volume
Descriptor that identifies a shift-JIS Kanji volume for Japanese.
* /S
The /S switch tells MSCDEX to patch MS-DOS to allow sharing of
CD-ROM drives on MS-NET based servers.
* Note: MSCDEX is a product of Microsoft Corporation
Sony Corporation (c)
Component Company,
Data Storage Group,
CD-ROM Drive Depts.,
As of November 03, 1994
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CD-ROM unter DOS 6