Command line parameters for ADI2Cxxx.SYS DOS device drivers
They can be entered in any order, any case on the 
device=adi2cxxx.sys    line in config.sys  
There must be spaces between parameters, but do not include
spaces inside parameters (i.e. c = s will not work).

  initonly     tells driver to initialize ADI2 registers
               only.  No device driver code remains resident
               ROM BIOS then handles all disk transfers

  noinit       tells driver to NOT initialize ADI2, but 
               driver will stay resident, and if appropriate,
               perform 32-bit I/O and read/write multiple

  io16 | io32  force device driver to perform 16-bit I/O or
               32-bit I/O.  If your CPU has a 16 bit external
               bus (i.e. 486SLC ) 32-bit I/O does not work, and 
               forcing it will cause your system to hang

  floppy       sets the ADI2 pin 'r3f7' as and input, and
               makes I/O reads to 3f7 into local bus cycles.
               (assumes that pin 34 of the floppy disk cable is
               connected to r3f7.)

  c=s, d=s     force drive c or d to single mode read/writes
  c=m, d-m     force drive c or d to multiple mode read/writes
               (note: if your drive doesn't support multiple mode,
                your system will hang)
  c=3-, d=3-   suppress the use of advanced timing modes 3 and 
               above for drive c and d

  c=lba-       supress LBA address mode for drive c or d.  NOTE: the  
  d=lba-       ADI2 driver does not yet support the BIOS called
               needed to partition and format a hard disk, so LBA
               mode offers no performance or feature benefits
               (as of rev 1.40)

  speed=50     command line overrides that tell the driver to use
  speed=40     the inidicated value for the system clock speed rather
  speed=33     than the value determined by the internal speed
  speed=25     measurement routine.  Used when the driver reports
  speed=20     that it cannot determine the clock speed and asks you
  speed=16     to turn on the 'turbo' switch, when it is already on.
               (incorrectly setting this to a value that is too low
                can cause LOSS OF DATA on your hard disk!!!!
               i.e. if you have a 50 MHz system <real 50 MHz, not 25
               MHz DX2 > and you set this to speed=25, your system
               will most likely hang, but may _just_ cause data 
               corruption.
               ********* use with care !!!! ***********

 [the following parameters were added with revision 1.49 of the DOS driver]

  alt_ide=off  tell driver to not attempt to autodetect system BIOS
               control of alternate IDE port (17x, 37x).  Normal mode
               for driver uses number of BIOS disks to decide if BIOS
               has supported alt IDE.  If disks on the alternate (or
               secondary) IDE port do not work right after loading
               this driver, try this parm.  If they cannot be
               accessed without this driver being loaded, then this
               is probably not the problem

  alt_ide=on   Force driver to control disks on alternate (or
               secondary) IDE port at 17x and 37x.  This parm will be
               needed if a SCSI card adds 'BIOS supported' hard
               disks, which will fool driver into not supporting alt
               IDE adapter.  If you have hard disk attached to
               secondary IDE adapter and you cannot access them 
               try this parameter


edc
Cirrus Logic
10/14/94
