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README.DOS
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1995-03-28
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105 lines
README.DOS
DOS DRIVER COMMAND LINE OPTIONS
-------------------------------
For default operation on the Primary IDE channel only, no command
line options are necessary for the DOS driver. To enable the
Secondary IDE channel, use the /I switch described below. Optimal
performance may be obtained via the /A option. The remaining options
will be of interest only to power users. To enable command line
options, append them to the DEVICE=CMD640X.SYS line in your
CONFIG.SYS.
NOTE: If you have a hard drive larger than 528 MB, the DOS driver
will automatically switch to Extended CHS translation mode if your
BIOS supports it. If your BIOS does not support Extended CHS
translation, then only the Secondary IDE port will be able to
support the full capacity of your drive via Extended CHS translation.
If you prefer LBA translation mode, specify /L.
/A<lbs> : Enable Advanced Timing modes. When this option is
specified, the driver queries the drive(s) for supported
IDE timing modes. The driver then sets up both the drive(s)
and the CMD Local Bus IDE controller for the fastest supported
timing mode(s). <lbs> specfies the local bus (PCI or VL-bus)
clock speed in MHz. Valid values are between 20 and 50.
WARNING: Disk access may be unreliable if the local bus speed
is incorrectly specified. If you are unsure of your local bus
speed, use <lbs>=50 until you determine the actual speed.
/B : Disable writeback cache. Some drives have an internal write-
back cache. By default, the driver enables it. This switch
prevents the driver from enabling it.
/D : To display detail information.
/H : Enable Fast Host Timing. This parameter will increase
transfer rate between the CMD Local Bus IDE controller and the
host on some motherboards. WARNING: due to motherboard chipset
bugs, this parameter may cause instability on some motherboards.
Please test data integrity thoroughly after enabling it.
/I<irql> : Specify IRQ level for Secondary IDE port. If drives
are connected to the Secondary IDE port, <irql> must be set
to the corresponding IRQ level (between 8 and 15). Otherwise,
drives on the Secondary IDE port will be ignored. NOTE: During
loading of the driver, you may cancel scanning of the
Secondary IDE port by pressing <ESC>.
/L : Enable support for LBA mode. The driver will access the
drives in LBA mode, rather than CHS or Extended CHS.
/N : Narrow IDE. Perform 16-bit wide I/O at all times rather
than 32-bit.
/O<port><drive><mode> : Override PIO Mode. Some drives have firmware
bugs which cause them to report the wrong PIO mode to the driver.
For instance, many Mode 2 drives are really Mode 0. The user
can override the PIO mode reported by the drive via /O.
port : 0=Primary IDE, 1=Secondary IDE
drive : 0=Master, 1=Slave
mode : PIO mode: 0-5
/P : Pause at end of driver init and wait for user to strike a
key. Useful for viewing diagnostic messages at boot time
before they scroll off the screen.
/Q<irql> : override default IRQ level for Primary IDE port with
<irql>. irql must be between 8 and 15.
/S : Single mode. Use single read/write IDE commands rather than
multiple read/write commands.
/T : Truncate Mode. If your BIOS does not perform translation on
drives larger than 528 MB (i.e. it limits drives to 1024
cylinders), then you must specify this switch if you wish the
Secondary IDE port to also truncate. If this switch is not
specified, the Secondary IDE port will always use translation.
/V : Don't perform verify even when requested. This isn't really
very risky when SMARTDRV is loaded, since SMARTDRV already
disables verify when write-caching is enabled.
/X : Exclude Primary IDE tunings. If your BIOS automatically sets
up the Primary IDE port and drive timings, the DOS driver will
normally override them when you specify /A. When /X is
specified, the driver will only setup drive timings on the
Secondary IDE port.
EXAMPLE:
device=c:\quickcmd\cmd640x.sys /v /a33 /i15 /o010
EXPLANATION:
/v : ignore any requests for verify.
/a33 : enable optimal performance timings for a 33 MHz local bus.
/i15 : the Secondary IDE channel uses IRQ 15.
/o010 : force the Primary IDE slave drive to use Mode 0
CFGIDE.EXE
----------
An IDE configuration utility is included, in addition, for customizing
CMD MS-DOS driver command parameters. This utility provides a user-
friendly interface with menus and on-line help.
DOSUTILS.EXE
------------
It is a self-extract archive file that includes diskprep.exe, diskprep.dat,
viewide.exe, cfgide.exe and checkide.exe. By running "dosutils" under DOS,
the above utility files will be extracted.
CMD2CH.SYS
----------
This is a driver to turn on the secondary channel of the CMD PCI640B
controller. It will not take up any memory after it is loaded.