Conceptronic Ieee 1394 Drivers
The installation of this IEEE 1394 PC-Card will provide a notebook with 2 high speed (400Mbps) ports which are especially designed for digital video cameras, DVD players, your iPod, mass storage devices and other peripherals that require large bandwidth.
-->Windows 7 includes 1394ohci.sys, a new IEEE 1394 bus driver that is implemented by using the kernel-mode driver framework (KMDF). The 1394ohci.sys bus driver replaces the legacy IEEE bus driver in port/miniport configuration-- 1394bus.sys and ochi1394.sys.
In some situations you might want to override the default behavior of 1394ohci.sys,. You can do this by setting certain registry values that it supports.
Registry Value Locations
You can set the 1394-related registry values either globally for all 1394 controllers in the system or individually for each 1394 controller. The 1394ohci.sys, bus driver first queries the global 1394 registry values and then queries the individual 1394 controller registry values.
The following registry location contains the global 1394 registry values:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices1394ohci Parameters
The following registry location contains the individual 1394 controller registry values:
Microsoft Ieee 1394 Driver Download
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass {6BDD1FC1-810F-11D0-BEC7-08002BE2092F}<NNNN>
<NNNN> represents the instance identification number for each 1394 controller.
Registry Values
The following table describes the registry values that the new 1394 bus driver supports. You can specify all registry values either globally or for a particular 1394 controller. Any registry values that are specified for a particular 1394 controller override any corresponding globally specified registry values.
| Name | Type | Value | Default | Description |
|---|---|---|---|---|
| DisableGenerationCountCompare | DWORD | 0 or 1 | 0 | The 1394ohci.sys bus driver compares the generation count value in the self_id register of the 1394 controller with the generation count value that is received in the asynchronous receive DMA request context buffer when it processes received asynchronous requests. Setting this value to 0 enables generation count comparison. Setting this value to 1 disables generation count comparison. |
| UseQuadletReadsForEnumeration | DWORD | 0 or 1 | 0 | Setting this value to 0 enables the default method for retrieving the contents of the configuration ROM. Setting this value to 1 causes the new 1394 bus driver to use asynchronous quadlet read transactions to retrieve the contents of the configuration ROM. |
| EnumerateIP1394 | DWORD | 0 or 1 | 0 | Setting this value to 0 disables enumeration of IP1394 devices on the 1394 bus. Setting this value to 1 enables enumeration of IP1394 devices on the 1394 bus. |
| EnableGapCountOptimization | DWORD | 0 or 1 | Optimize for 1394a topology only | Setting this value to 0 disables gap count optimization. Setting this value to 1 enables gap count optimization. Note Enabling gap count optimization improves the gap count for all 1394 bus topologies, including 1394b. The gap count value that is used is based on the table method, as specified in the IEEE-1394a specification. End-users must make sure that the gap count that is used is valid for their 1394 bus topology. |
| EnablePersistentCycleStarts | DWORD | 0 or 1 | 0 | Setting this value to 0 disables cycle start packets if no isochronous-capable nodes are found on the 1394 bus. Setting this value to 1 enables cycle start packets regardless of whether isochronous-capable nodes are found on the 1394 bus. Note The 1394ohci.sys bus driver disables and enables cycle start packets only if the local node is the bus manager. |
Related topics
The IEEE 1394 Driver Stack
IEEE 1394 Bus Driver in Windows 7
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| Hardware Type: | IEEE 1394 Controller | |
| Compatibility: | Windows XP, Vista, 7, 8, 10 | |
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| Download Size: | 3.4 MB | |
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This page contains information about installing the latest IEEE 1394 Controller driver downloads using the IEEE 1394 Controller Driver Update Tool.
IEEE 1394 Controller drivers are tiny programs that enable your IEEE 1394 Controller hardware to communicate with your operating system software. Maintaining updated IEEE 1394 Controller software prevents crashes and maximizes hardware and system performance. Using outdated or corrupt IEEE 1394 Controller drivers can cause system errors, crashes, and cause your computer or hardware to fail. Furthermore, installing the wrong IEEE 1394 Controller drivers can make these problems even worse.
Recommendation: If you are inexperienced with updating IEEE 1394 Controller device drivers manually, we highly recommend downloading the IEEE 1394 Controller Driver Utility. This tool will download and update the correct IEEE 1394 Controller driver versions automatically, protecting you against installing the wrong IEEE 1394 Controller drivers.