The OHCI-konformer VIA 1394-Hostcontroller driver lets Windows communicate with a VIA-based IEEE 1394 controller, commonly known as a FireWire controller. Provided by Microsoft, it supports the connection between the controller and compatible equipment such as digital video cameras, external storage devices, and audio interfaces.

Key Features

• FireWire controller support: Enables Windows to recognize and manage a VIA 1394 host controller that follows the Open Host Controller Interface (OHCI) standard.
• Device communication: Provides the host-controller support needed to transfer data between the computer and connected IEEE 1394 equipment. Some peripherals may also require their own drivers or software.
• Windows integration: Works with Windows hardware management tools, including Device Manager, for checking device status, updating drivers, and troubleshooting connection issues.
• Support across Windows versions: Driver options cover Windows 10, 8.1, 7, Vista, and XP. Select a package that matches your installed operating system and its 32-bit or 64-bit architecture; a single package may not support every version.

How to Install

1. Confirm your hardware and Windows version. Open Device Manager and look under “IEEE 1394 Bus host controllers.” Check that the listed controller matches the OHCI-konformer VIA 1394-Hostcontroller. If its name differs, compare the hardware IDs in the device’s Properties window with the driver’s compatibility information.

1. Choose a compatible driver. Download the Microsoft driver package intended for your Windows version and system architecture. Avoid forcing installation if Windows reports that the package does not match your hardware.

1. Prepare the files. Extract the download if it is compressed. Close applications using FireWire equipment, and safely disconnect attached storage devices before changing the controller driver.

1. Install the driver. Run the included installer if one is provided. Otherwise, right-click the controller in Device Manager, choose the driver update option, and browse to the extracted driver folder. The wording of these options varies by Windows version.

1. Restart and test. Restart the computer if prompted, then check Device Manager for warning icons. Reconnect your FireWire device and test it with the appropriate application. If problems began after the update, use the controller’s Properties window to roll back the driver when that option is available.

Common Issues and Fixes

• Install fails: Windows may block older or unsigned 1394 OHCI driver packages. Use the Microsoft/Windows Update driver, verify driver signing, and avoid forcing compatibility mode unless the package is trusted.
• Device not detected: Enable IEEE 1394/OHCI in BIOS/UEFI, reseat the VIA 1394 card, try another FireWire cable/port, and check Device Manager for Code 10/43 errors.
• Version conflicts: Uninstall old third-party 1394 drivers, remove the device with “Uninstall device,” reboot to reinstall `1394ohci.sys`, and roll back if a Windows update breaks the controller.