This is the beta V0.1 version of the IDE bus mastering driver for
Windows NT 4.0
Copyright (c) Tyan Computer Corp.

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| Features |
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1. The driver supports PIO mode 0, 1, 2, 4

2. The driver supports multiword DMA mode 1 and 2

3. It support CHS and LBA parameters.

4. This version will give the hard disk at least 15% improvement even under
single tasking. Under multitasking, it will give you even more performance
increase for the IDE drive.

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| Installation: |
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1. Install Windows NT 4.0 first. This driver is not compatible with NT 3.51
so do not try it on NT 3.51 or NT 3.5.

2. Unzip the tynbmnt4.zip file to a floppy disk.

3. In Windows NT 4.0
My Computer --> Control Panel --> SCSI Adapters -->
Drivers folder --> Remove "IDE CD-ROM (Atapi 1.2)/Dual-Channel PCI IDE" driver
DO NOT restart the system yet --> Drivers folder -> Add -> Have Disk -->
OK --> Select "Tyan 32Bit PCI EIDE Bus Mastering Driver" -->
Restart the system.

3a. If for some reason you can not remove the "IDE CD-ROM (Atapi 1.2)/
Dual-Channel PCI IDE" driver from Microsoft, go to the Control Panel
and double click the DEVICES applet. Find "atapi.sys" and select the
atapi.sys driver. Then disable the driver by clicking on the "Startup"
button and the disable bubble. Then go ahead to install the bus master
driver as described in step 3.

4. You can check the version of the driver by checking the properties of the
file tynbmnt4.sys in the \your windows nt4.0\system32\drivers directory.

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| Removing the Driver |
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There are 3 ways of removing the driver.

1. Temporarily

In Control Panel
SCSI Adapters -> Drivers folder -> Select "Tyan 32Bit PCI EIDE Bus
Mastering Driver" -> Remove -> DO NOT restart the system yet ->
Add -> select "IDE CD-ROM (Atapi 1.2)/Dual-Channel PCI IDE -> Restart

2. Permanently.
Go to the \your windows NT 4.0\system32 directory and find the oemSCSX.inf file associated
with the bus master setup file. Delete all the files associated the bus
mastering IDE driver. The X could be any number starting from 0.

3. In case you can not boot up to Windows NT.

Just replace the tynbmnt4.sys in the \your Windows NT 4.0\system32\drivers directory
with atapi.sys file.

In \your Windows NT 4.0\system32\drivers directory type

copy atapi.sys tynbmnt4.sys

then boot up to NT and do the following.

+----------------+
| Devices Tested |
+----------------+
If the driver works for you, let us know about your hard disk and CD-ROM
model so we can added to the compatibility list. Please send the information
to ok_nt40_01@tyan.com

This bus master driver has being tested with the following devices.

Tyan's Titan I, II, & III motherboards.
Tomcat I & II

Sony 2X OK
Sony 4X OK
Mitsumi 2X OK
Toshiba 4X OK
Hitachi 4X OK

Some of the hard disks have timing or firmware problems. That will
cause the system to lock up. Read our WWW FAQ section and do the DMA
timing test yourself to test your hard disk DMA protocol.

Hard Disk PIO Mode Multiword DMA mode Bus Mastering
Conner 1.2GB 3 1 OK
Fujitsu 1GB 4 2 OK
Fujitsu 540MB 4 2 OK
HP 1.6GB 4 2 OK
IBM 540MB 3 1 OK
Maxtor 850MB 3 1 bad, firmware problem
Maxtor 1.6GB 4 2 OK
NEC 1.6GB 3 1 OK
Quantum 1GB 4 2 OK
Quantum 1.2GB 4 2 OK
Quantum 730MB 3 1 OK
Quantum 540MB 3 1 bad, firmware problem
Quantum 345MB 3 1 OK
Quantum 270MB 3 1 bad, timing problem
Seagate 1GB 4 2 OK
Seagate 1.2GB 4 2 OK
Seagate 540MB 4 2 OK
SyQuest EZ135MB 0 0 PIO transfer only
Western 1GB 3 1 bad, timing problem
Western 640MB 3 1 OK
Western 1.2GB 4 2 OK

+---------------+
| Bug Reporting |
+---------------+
1. If you believe that you have discovered a bug, please send a email to
bug_nt4@tyan.com

2. In the email, please include the following information
a) You system hardware information
b) The first two lines of the blue screen dump from Microsoft, if the
system crashes.
c) Please describe the problem clearly. Your report will be ignored if
your problem can not be duplicated.