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. Ieee 1394 For Windows 10 free download - Texas Instruments OHCI Compliant IEEE 1394 Host Controller, Facebook for Windows 10, PDF Reader for Windows 10, and many more programs. Find TC Electronic software downloads at CNET Download.com, the most comprehensive source for safe, trusted, and spyware-free downloads on the Web.
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.
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.
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.
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.
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.
This issue occurs because the legacy 1394 bus drivers (1394bus.sys and Ochi1394.sys) are removed in Windows 8.1 or Windows 8.
How to obtain this update
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
All supported x86-based versions of Windows 8.1 or of Windows 8
All supported x64-based versions of Windows 8.1 or of Windows 8
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:
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
Open Device Manager in Control Panel.
Expand IEEE 1394 Bus host controllers, and then locate the host controller.
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:
Click Browse my computer for driver software.
Click Let me pick from a list of device drivers on my computer.
Click Generic1394 OHCI compliant host controller (Legacy), and then click the Next button.
Click the Close button.
There are no prerequisites for installing this update.
To apply this update, you do not have to make any changes to the registry.
You have to restart the computer after you apply this update.
Update replacement information
This update does not replace a previously released update.
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
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the 'Applies to' section.
Steps of uninstalling the 1394 OHCI Legacy Driver.msi file
Open Control Panel in the Category view.
Click Uninstall a program in Control Panel.
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.
Windows 10 1394 Legacy Driver
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
Microsoft Ieee 1394 Driver Download
824684 Description of the standard terminology that is used to describe Microsoft software updates