NEC Multifunction Devices Driver



Install NEC PC-LL750GD laptop drivers for Windows 7 x64, or download DriverPack Solution software for automatic drivers intallation and update. You can either do that using the PCI spec, exposing multiple functions in which case Microsoft's PCI.sys will be the bus driver that exposes multiple device, or you can do it by exposing a single function to PCI.sys and then supplying your own bus driver which further splits your adapter up into different logical devices. Download NEC Wi-Fi device drivers or install DriverPack Solution software for driver scan and update.

  1. NEC Multifunction Devices Driver
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If a multifunction PCI device conforms completely to the PCI multifunction standard, the PCI bus driver enumerates the individual functions. The PCI bus driver manages the fact that there is more than one function residing at a single device location. To the rest of the system, the individual functions operate like independent devices.

NEC Multifunction Devices Driver

Vendors of a PCI multifunction device on an NT-based platform must do the following:

  • Ensure that the device conforms to the PCI multifunction specification.

  • Provide a PnP function driver for each function of the device.

    Since the system-supplied bus driver handles the multifunction semantics, the function drivers can be the same drivers that would be used if the functions were packaged as individual devices.

  • Provide an INF file for each function of the device. Sigmatel others driver download windows 10.

    The INF files can be the same files that would be used if the functions were packaged as a individual devices. The INF files do not need any special multifunction semantics.

For example, the following figure shows the sample device stacks that might be created for a multifunction PCI device with ISDN and modem functions.

NEC Multifunction Devices Driver

As shown in the previous figure, rather than enumerating one multifunction device, the PCI driver enumerates two child devices. The PnP manager treats each child device like a typical device, locating INF files, loading the appropriate drivers, calling their AddDevice routines, and so forth until a device stack is created for each device. The PCI driver arbitrates the resources for the child devices and manages any other multifunction aspects of the device. The vendor of the multifunction card provides function drivers and INFs for the ISDN and modem devices, just as if they were separate devices.

Driver

NEC Multifunction Devices Driver

The illustration focuses on the function driver and bus driver for each function and their associated FDO and PDO. Any filter drivers (and filter DOs) are omitted for simplicity.