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                Copyright (c) 1995-1999 VIA Technologies Inc.             
                                                                          
         AGP 4X/133 Bus Master(Ultra DMA) PCI IDE Driver ReadMe.Txt       
                                    for                                   
                                   OS/2                                   
                                                                          
        * This  readme  file is used to provide the  information for      
          installation, Enable/Disable DMA and Uninstall "AGP 4X/133      
          Bus Master PCI IDE Driver".                                     
  

    The  AGP 4X/133 Bus Master IDE controller is  a  high  performance Bus
  Master PCI IDE  controller.  This "AGP 4X/133 Bus Master PCI IDE Driver"
  distribution floppy  is used  to utilize  the DMA operation of your Hard
  disk/CD-ROMs  drives in  order to release the I/O loading from the  CPU.
  You could refer to the related section to install the driver individually.

                                CONTENTS
                        ***********************
1)  System Requirements
2)  Distribution Package Contents
3)  OS/2 Driver
4)  Package Version Identify
5)  Verifying Installation of the Driver
6)  Notes


1) System Requirements

   * This package should be installed on the VIA Bus Master IDE chipset,
     VT82C580VP or later, and others' chipset will not be supported.

   * The  "AGP 4X/133 Bus Master PCI IDE Driver"  supports the following
     Operation System.

        Operation System                Version
     
        OS/2                            Warp 3.0 or Warp 4.0


2) Distribution Package Contents
     This distribution floppy is compress by auto uncompressing format. You
   could uncompress it by execute it.

   The floppy by uncompressing includes these files are listed below.

ROOT:
       README.TXT              This file.
       RELEASE.TXT             Released Note
       VIAIDE.DDP              For OS/2 DDINSTALL
       VIACD.FLT
       VIAIDE.ADD
      OS2.EXE

3)  OS/2 Driver

    *************************
    ** Driver Installation **
    *************************
    You can choose one of the following methods to install driver :

      Boot from the OS/2 hard disk and type the "DDINSTAL" command to install
    the device driver.

                C> DDINSTAL

      After  the  "DDINSTAL",  the  original  CONFIG.SYS  will  be renamed to
    CONFIG.VIA and add two lines into the CONFIG.SYS.

        BASEDEV=VIAIDE.ADD
        BASEDEV=VIACD.FLT


    ************************
    ** Enable/Disable DMA **
    ************************
      The default setting for the hard disk is DMA enabled and for the CD-ROM
    is DMA disabled. You can enable or disable a single device by setting the
    following parameters after VIAIDE.ADD in CONFIG.SYS.

      /A:[0|1]    Select primary or secondary channel.
      /U:[0|1]    Select master or slave device in the same channel.
      /BM         Enable DMA mode.
      /!BM        Disable DMA mode.

    Example:

         BASEDEV=VIAIDE.ADD /A:0 /U:0 /BM /A:1 /!BM

      This setting will enable the DMA mode for the device connected
    under primary channel master position and disable the DMA mode
    for the entire secondary channel.

    Note: The undefined position in above, primary channel slave position,
          is using the default setting.

      After the changing, you should shutdown the OS/2 Wrap and reboot again
    to active the change.

    ***************************
    ** Driver Uninstallation **
    ***************************
      You could remove  the "AGP 4X/133 Bus Master PCI IDE Device Driver for
    OS/2" by removing above two lines from the config.sys file and  deleting
    the  VIA  drivers named "VIAIDE.ADD" and "VIACD.FLT" located in the \OS2
    directory by  manual operations. After the reboot, the  "AGP 4X/133  Bus
    Master PCI IDE Driver" is not existing in your system.



4)  Package Version Identify

      You could check this distribuation version and release date by using
    the DATE\TIME displayed by using dir/p command, e.g :

      OS2     EXE        27,897  mm-dd-yy  hh:mi a OS2.EXE

    The version number reads as 2.hh.mi, which was released on the date of mm/dd/yy.


5)  Verifying Installation of the Driver

        1. Open the "OS/2 system" in the desktop.
        2. Open the "System Setup" in the "OS/2 System".
        3. Open the "Hardware Manager" in the "System Setup"
        4. You will find "VIAIDE.ADD" at device page for Hard Drive or
           you will find "VIACD.FLT" at device page for CD-ROM.


6) Notes
   *   It is recommended to install the CD-ROM which is not on the same
     channel with the hard drive for the performance issue.

       If you play VCD or DVD abnormally on some CD-ROM or DVD-ROM which
     is on the same channel with hard drive, we recommand you to setup
     the CD-ROM or DVD-ROM on the separatly channel.

