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2. Tc Electronic 1394 Driver Download For Windows 10 64-bit
3. Tc Electronic 1394 Driver Download For Windows 100

This article describes an issue that occurs when you use a FireWire port-based device in Windows 8.1 or Windows 8. Additional steps of configuration is required to enable this update after the installation.

1. This section provides installation information, specific to IEEE 1394 device drivers in Microsoft Windows 2000 and later operating systems. Vendors supplying their own IEEE 1394 device driver should make that driver a member of the Base setup class in the INF Version Section of the driver's INF file.
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Symptoms

Assume that you have a computer that equips with an IEEE 1394 FireWire controller card. After you upgrade the computer from Windows 7 to Windows 8.1 or Windows 8, devices that connect to the computer by using a FireWire port do not work.

Cause

VIA Fire IEEE 1394 controllers offer complete single chip solutions that provide high-speed seamless plug and play connection to the latest IEEE 1394 (Firewire) enabled PC peripherals and consumer devices such as HDDs, printers, stereos and video cameras. Solutions such as the VIA Fire 1394 host controllers boast integrated Link and Physical Layers, enabling a.

This issue occurs because the legacy 1394 bus drivers (1394bus.sys and Ochi1394.sys) are removed in Windows 8.1 or Windows 8.

Resolution

Update information

How to obtain this update

Microsoft Download Center

The following files are available for download from the Microsoft Download Center:

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Additional steps of configuration requirement

After you install the 1394 OHCI Legacy Driver.msi file, follow these steps:

1. Right-click the Legacy1394.inf file under one of the following paths based on the computer's architecture:
   

   • C:Program Files1394 OHCI Compliant Host Controller (Legacy)x86_driver

   • C:Program Files1394 OHCI Compliant Host Controller (Legacy)x64_driver

2. Click Install.

3. Open Device Manager in Control Panel.

4. Expand IEEE 1394 Bus host controllers, and then locate the host controller.

5. Right-click the host controller, and then click Update Driver Software.
   The screen shot of the host controller and the Update Driver Software is listed in the following example:
   

6. Click Browse my computer for driver software.

7. Click Let me pick from a list of device drivers on my computer.

8. Click Generic1394 OHCI compliant host controller (Legacy), and then click the Next button.

9. Click the Close button.

Prerequisites

There are no prerequisites for installing this update.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8.1 and Windows 8 file information notesThe MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are not listed

For all supported x86-based versions of Windows 8.1 or of Windows 8

For all supported x86-based versions of Windows 8.1 or of Windows 8

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the 'Applies to' section.

More Information

Steps of uninstalling the 1394 OHCI Legacy Driver.msi file

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1. Open Control Panel in the Category view.

2. Click Uninstall a program in Control Panel.

3. Right-click 1394 OHCI Compliant Host Controller (Legacy), and then click Uninstall.
   The screen shot of uninstalling the 1394 OHCI Compliant Host Controller (Legacy) is listed in the following example:
   

Additional package information

• This driver is only intended to work with legacy 1394 host controllers. Therefore, you may experience lower transfer data rates than the 1394b driver.

• The driver is intended to resolve compatibility issues for 1394 peripherals on 1394b systems. If you are not experiencing these issues, you should continue to use inbox drivers that are provided in Windows 8.1 or Windows 8.

• You have to reinstall this stand-alone driver package if you upgrade to a newer operating system version in the future.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

The following diagram illustrates the IEEE 1394 driver stack with the new 1394 bus driver and the Microsoft-supported 1394 client drivers.

A client driver for a device that connects to the IEEE 1394 bus driver sits on top of the IEEE 1394 driver stack. The bus driver provides a hardware-independent interface to the IEEE 1394 bus. The device driver communicates with the device by sending IRPs, which are processed by the IEEE 1394 bus driver. Before Windows 7, the bus driver was a combination of a port driver (1394bus.sys) and a primary miniport driver for the motherboard's host controller (ochi1394.sys). In Windows 7 and later versions, the legacy port/miniport bus drivers are replaced by 1394ohci.sys, a monolithic IEEE 1394 bus driver that is implemented by using the kernel-mode driver framework (KMDF). The 1394ohci.sys bus driver is fully backward compatible with the legacy 1394 bus drivers. For more information about some known differences in behavior between the new bus driver and the legacy 1394 bus drivers, see IEEE 1394 Bus Driver in Windows 7.

The following illustration shows the relationship between the legacy and the new 1394 bus drivers.

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To issue commands to devices connected to the bus, drivers issue the IRP_MJ_DEVICE_CONTROL IRP, with control code IOCTL_1394_CLASS. The driver packages the parameters in an IEEE 1394 I/O request block (IRB), and passes a pointer to it in the Parameters.Others.Argument1 member of the IRP. The FunctionNumber member of the IRB determines the type of operation, and the u member describes the operation. The bus driver uses the IOCTL_1394_CLASS IRP to present an interface to both the bus and the host controller.

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The IRB structure contains parameters that apply to each bus request and request-specific parameters. The u member of the IRB contains the request-specific parameters, in a union of data structures, one per request type.

During normal operation, drivers receive ordinary I/O requests (such as IRP_MJ_READ), convert them to the appropriate IEEE 1394 operation, and dispatch that operation to the device through IOCTL_1394_CLASS.

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