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README Driver File Contents (via.zip)

               VIA VT82C496G IDE Device Driver Installation Guide

                           Date: Jan. 11, 1995


Objects

This application note is used to provide the information to use the "INSTALL.EXE" utility to 
setup your system and to install the device drivers for the VT82C496G and NS PC87332 IDE 
chips such that it supports 2 IDE channels. One is 1Fx channel and the other is 17x channel.
There are OS/2, Microsoft Windows, NetWare 3.11 or 4.0x , SCO UNIX, Windows NT device drivers
supported by VIA. 

If your boot disk drive is not the same size as the floppy (3.5") released from VIA then you 
could copy this release floppy to another floppy according to the size of the boot disk drive and 
continue to the rest of the installation procedure.

Note:  Some BIOS have an option to turn on IDE drive block transfer mode. This may cause 
inconsistent problem if used with VIA IDE driver. Please turn off this option before using VIA 
IDE driver.
    
INSTALL.EXE

The VT82C496G IDE chip could enhance the speed of the cycle time and active time of IDE 
drive but WinBond W83757 not. Therefore, only the first channel that is 1Fx channel, which the 
VT82C496G has control of ,  should be set speed of the drivers. 

"INSTALL.EXE" is used after you have plugged the VIAIDE card in your system. The utility 
provide two kinds of methods to install the device driver  to your system, that is "full" and 
"customized" installation. "INSTALL" could be running only on the Floppy Drive and the 
floppy diskette must not be write protected. Under the dos prompt type the 
"INSTALL" to execute the utility,
 
        A> INSTALL

and the screen will be displayed :

	Main
	[F1]..		Help
	[Enter].. 	Continue
	[ESC]..     	Quit

Type [F1] to get the help message and [ESC]  to exit  this setup utility. Type [Enter] to 
continue the setup utility, and the following screen will be shown.

	Installation
	[F1].. 		Help
	[F2]..		Full Installation
	[F3]..		Customized Installation
	[ESC]..		Quit

Type [F1] to get the help message and [ESC] to exit  this setup utility. Type [F2], then the 
setup utility will  install all of the VIA device drivers for you which include the Windows 
and NetWare drivers.  Type [F3], the setup utility will provide a customized installation method 
for you. 

Full Installation

The full installation will automatically install all of the device drivers for you except you type  
[ESC] to quit the installation procedure in the middle of the installation. This setup utility 
provides the Windows and NetWare drivers. If you want to install the OS/2 driver for your 
system, please refer the "OS/2 Installation" section. If you want to install the SCO UNIX driver 
for your system, please refer the "SCO Unix Installation" section on this Application Note. SCO 
Unix driver and OS/2 driver could not be installed though this setup utility, and you should follow 
the procedure described in the "SCO Unix Installation" and "OS/2 Installation" sections.

The Windows and NetWare drivers will be installed sequentially to your 
hard disk.  When the NetWare driver is installed completely, you could type [ESC] to quit from 
this setup utility and all of the drivers are installed successfully. You also could type [ESC] to exit 
in the middle of the install procedure. Then the install procedure will not be completed. If you 
want to install the driver again, you could select the manual installation to complete the 
installation. For the detail information you could refer the "Customized installation" section.

Customized Installation

The customized installation provides a method that you could install the device driver 
customized. The screen will be displayed when you select the customized installation.

	Customized Installation
	[F1]..		Install Windows Driver
	[F2]..		Install NetWare Driver
	[ESC]..		Quit

Windows

When you select [F1], the Windows driver will be installed to your disk. The setup utility will 
prompt you to type the directory where the Windows driver will be. If  you enter [ENTER] then it 
will take the default directory. 

It also prompt you to type the file name which the original "system.ini " saves as. If you do not 
type the file name then the default file name will be used. It will add one or more lines into the 
"SYSTEM.INI" file, that is "device=c:\windows\system\viaide.386", "32BitDiskAccess=ON" if 
you have not turn on the 32bits disk access mode. Then it will move the Windows driver from the 
floppy to the destination directory. Type [ESC] to complete the installation. This Windows driver 
could support the 32bits disk access mode if you want to optimize your access speed. 

The default IRQ for second IDE channel is 15 and if you want to change the IRQ to 11 then 
you could set it by adding a new line to the [386Enh] section at the "system.ini".  Like this ,

	 VIA_IRQ=11

to replace the default IRQ 15 with IRQ 11.

NetWare

When you select the [F2], the NetWare driver will be installed to your disk. The setup utility 
will prompt you to type the directory where the NetWare driver will be. If  you enter [ENTER] 
then it will take the default directory.
 
The VIA Netware driver could only drive the first IDE channel, VT82C496G,  to provide the 
enhance function. For the second channel, WinBond W83757, it could be drive with the Netware 
ISA disk. The way to load ISA disk and change IRQ number could follow the Netware manual to 
set it. The default IRQ number for second IDE channel is IRQ 15.
 
After the installation, you could type the "load" command to load the driver into the NetWare.

OS/2

You should install the OS/2 driver with these two procedures described below. 
First, you boot from the OS/2. Type the "DDINSTAL" command under the OS/2
command prompt. For example :
	
	C> DDINSTAL

Type the source floppy drive and the destination disk drive which the OS/2 boot from. Then the 
VIAIDE.ADD will be copy to the destination drive and append a line "BASEDEV=VIAIDE.ADD" to 
the "CONFIG.SYS" file.

Second, modify the "CONFIG.SYS' file to move the line "BASEDEV=VIAIDE.ADD" before 
the default OS/2 hard disk driver named "BASEDEV=IBM1S506.ADD". Otherwise the default 
"IBM1S506.ADD" device driver will be executed but not the "VIAIDE.ADD". 

After these two procedures you could boot from the OS/2 and the VIA/IDE device driver will 
be running.

The default IRQ number for the second IDE channel is 15. If you want to change the default 
IRQ to the IRQ 11 then you could enter the following arguments like the following :

	BASEDEV=VIAIDE.ADD /A:1 /IRQ:11

and the default IRQ 15 could be changed.

SCO Unix 

In this section it will provide the information how to install the VIA/IDE device driver to your 
SCO UNIX Operation System. Please follow these steps listed below to install the VIA/IDE device 
driver.

The following steps are used to convert the "VT82C496G VLB IDE Device Drivers" diskette 
which is prepared with DOS format to a SCO UNIX "custom" installable diskette. You should 
prepare an extra blank diskette, 1.2MB (5.25") or 1.44MB (3.5"), to complete the installation.

1.  Login to the SCO UNIX with "root" supper user account.

	login : root

2.  Insert the "VT82C496G VLB IDE Device Drivers diskette" into the 3.5" disk drive.

3.  Type the following commands under the SCO UNIX prompt "#":

          # doscp /dev/fd0135ds18:/unix/install   /tmp
          # sh /tmp/install
     
You could change the device name where the 3.5" diskette is according to your system 
configuration. You could also copy the "VT82C496G VLB IDE Device Drivers" to 5 1/4" diskette 
and install from it. 

In this installation, it will require you to insert a new blank diskette. After this "install" 
command, you will get a  SCO UNIX "custom" installable diskette.

Now you can use the "custom" installable diskette to install "VIA/IDE Device Driver" to your 
SCO UNIX by the "custom" command. Please insert the "custom" installable diskette to the disk 
drive and type the as follows :

          # custom

Follow the installation instruction and rebuild the kernel.

If you have installed the IDE drives on the 17x channel, you should execute the 
following commands to extract the major number. 

        # configure -j vth1

For example, if you get the number "24", the you could make the nodes for the 17x 
drivers, such as

        # mknod  /dev/mio0 b 24 40

for the drive 0 of 17x channel and 

        # mknod /dev/mio1 b 24 104 

for the drive 1 of 17x channel.

The default IRQ for the second IDE channel is IRQ 15. If you want to change the IRQ 
15 to IRQ 11 and follow the method listed below to change it.

First, edit the file "/etc/conf/pack.d/vth1/space.c" to change the define IRQ number 15 
to 11. Like this,:

#define WD1_0_VECT 11

then relink the kernel,

	# /etc/conf/cf.d/link_unix

and use the kernel as the boot kernel then the IRQ 11 for the second channel will work.

Windows NT

There are two kinds of methods to install the VIA/IDE Windows NT device driver. One is to 
install the VIA/IDE Windows NT driver at the Windows NT setup time. The other is to install the 
VIA/IDE Windows NT driver after the system setup. But the first method is recommended because 
if you do not install the VIA/IDE Windows NT at the Windows NT setup time then the Windows 
NT system will not boot normally. In this circumstance, you must replace the VIA/IDE with a 
non-enhance IDE card to boot the Windows NT then install the VIA/IDE Windows NT driver 
with the second method and plug the VIA/IDE again.

The first install method is described as follows. The VIA/IDE Windows NT device driver 
should be installed at the system setup time otherwise the system will startup abnormally. After 
the booting from the Windows NT setup floppy the "Windows NT Setup" screen will be displayed. 
In this "Welcome to Setup" screen type "ENTER" key to continue the setup procedure.

After typing the "ENTER" key, the Windows NT setup procedure will prompt you to choose the 
setup methods. There are two setup methods provided by Windows NT. One is "Express Setup" 
and the other is "Custom Setup". Type "C" to choose the "Custom Setup" method to setup your 
Windows NT system.

After the scanning for SCSI adapters,a SCSI adapters will be displayed on the screen if there is 
a SCSI adapter found in your system otherwise no SCSI adapter will be displayed. In this screen 
type "S" to configure additional SCSI adapters. Then you will be asked to configure an additional 
SCSI adapter for use with Windows NT. To navigate the light bar to select the "Other (Requires 
disk provided by a hardware manufacturer)". Then insert the "VIA/IDE Device Driver" into driver 
A and press ENTER. 

The "VIA VT82C496G" will be recognized by Windows NT and press "ENTER' to continue the 
setup. After the "VIA VT82C496G" device driver setup, the device driver will be displayed on the 
previous SCSI Adapters screen and type "ENTER" to continue Windows NT setup. After this 
"VIA VT82C496G" device driver installation, you could follow the Windows NT procedure to 
install the rest of Windows NT.

The second method is to install the VIA/IDE Windows NT driver after the system is setup. 
Select the "Windows NT Setup" icon on the Main windows. You should choose the "Options" 
menu when the "Windows NT Setup" is pop up.  Navigate the light bar to select the "Add/Remove 
SCSI Adapters" option to install the VIA/IDE Windows NT driver. Push the "Add" button then 
the "Setup Message" message box will be displayed and you select the "OK" button to continue 
this installation.

Poll down the "Adapter" menu and navigate the light bar to select the "Other [Requires a disk 
from a hardware manufacturer]". Then insert the "VIA/IDE Device Driver" diskette into the 
floppy drive and change the path to "A:\nt". Push the "OK" button when you already ready. After 
you push the "OK" button then the "Select OEM Option" message box will be displayed and the 
"VIA VT82C496G" item will be displayed and you push the "OK" button again. 

At the "Select SCSI Adapter Option" message box you push the "Install" button to continue this 
installation and then push "Continue" button to complete this installation. After the copy the 
VIA/IDE Windows NT is installed successfully. After the reboot, the VIA/IDE Windows NT will 
work.

The default IRQ of  the second IDE channel is 15 and could not be changed.