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1993-03-29
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CHINON CD-ROM DEVICE DRIVER DISK
COMMAND LINE SWITCHES
The information presented here is taken from the Host Adapter Card User's
Manual and is intended to be a handy ready reference for the command line
switches in the "DEVICE=" line within the CONFIG.SYS file:
DEVICE=c:\..path..\CDRVR.SYS /A:0 /D:MSCD000 /F:1 /N:1 /S:0
/A: switch
~~~~~~~~~~
This switch specifies the Host Adapter Card's address range. The ranges are as
follows:
A:/ switch Range (decimal) Range (hex)
~~~~~~~~~~ ~~~~~~~~~~~~~~~ ~~~~~~~~~~~
0 768 - 783 300 - 30F
1 784 - 799 310 - 31F
2 800 - 815 320 - 32F
3 816 - 831 330 - 33F
4 832 - 847 340 - 34F
5 848 - 863 350 - 35F
6 864 - 879 360 - 36F
7 880 - 895 370 - 37F
8 896 - 911 380 - 38F
9 912 - 927 390 - 39F
10 928 - 943 3A0 - 3AF
11 944 - 959 3B0 - 3BF
12 960 - 975 3C0 - 3CF
13 976 - 991 3D0 - 3DF
14 992 - 1007 3E0 - 3EF
15 1008 - 1023 3F0 - 3FF
/D: switch
~~~~~~~~~~
This switch specifies the device driver name. MSCDEX uses this name to locate
and communicate with the device driver. This name can be up to 8 characters in
length. There must not be a colon (":") anywhere within the name. For example:
/D:MSCD001
/F: switch
~~~~~~~~~~
This switch specifies the method that the device driver uses to communicate
with the CD-ROM drive(s). The method used determines the speed at which data
is read from the drive.
Here are the four possible modes shown fastest to slowest:
Switch Read Method
~~~~~~ ~~~~~~~~~~~
/F:1 pseudo DMA, blind reads, 2 bytes per read
/F:2 pseudo DMA, blind reads, 1 byte per read
/F:3 pseudo DMA, non-blind reads
/F:4 programmed I/O
In almost all cases you should be able to use the fastest mode. In other cases
you may have to use a slower mode for one of the following reasons:
- You have many devices connected to the SCSI bus
- You are using very long data cables
- The total cable length is over 18 feet
- The system is operating in an electrically noisy environment
Use the /F:1 mode first. If that is unsatisfactory, use a slower mode.
/N: switch
~~~~~~~~~~
This switch specifies the number of CD-ROM drives connected to the Host
Adapter Card. For example:
/N:1 one drive connected
/N:2 two drives connected
The /N: switch must be placed before the /S: switch in the "DEVICE=" line.
/S: switch
~~~~~~~~~~
This switch allows you to assign the DOS drive letter to the CD-ROM drive by
SCSI ID number. If you have two or more drives connected to the Host Adapter
Card, you can designate the DOS drive letter to be assigned to each drive.
For example, you have two connected drives and DOS has assigned the letters
D: and E: to them. You have assigned SCSI ID numbers 2 and 0 to these same
drives. The /S: switch associates the SCSI ID numbers to the drive letters as
follows:
/S:20
The drive with SCSI ID number 2 becomes the D: drive.
The drive with SCSI ID number 0 becomes the E: drive.
If you wanted the drive with SCSI ID number 0 to be the D: drive and the drive
with SCSI ID number 2 to be the E: drive:
/S:02
The drive with SCSI ID number 0 becomes the D: drive.
The drive with SCSI ID number 2 becomes the E: drive.
Use the same process for assigning up to seven drives. For example:
/S:1620435
The drive with SCSI ID number 1 becomes the D: drive.
The drive with SCSI ID number 6 becomes the E: drive.
The drive with SCSI ID number 2 becomes the F: drive.
The drive with SCSI ID number 0 becomes the G: drive.
The drive with SCSI ID number 4 becomes the H: drive.
The drive with SCSI ID number 3 becomes the I: drive.
The drive with SCSI ID number 5 becomes the J: drive.
Notice there are no spaces within the entire switch.