What is "WDM" driver?

Windows Driver Model (WDM) provides a common set of I/O services and binary-compatible device drivers for both MicrosoftR Windows 98 and Windows 2000. To help decrease the effort necessary for hardware vendors to support all Windows platforms, this driver model is based on a class/minidriver structure that provides modular, extensible architectures for device support. The WDM driver support for Windows 98 and Windows 2000 includes:

*Stream class driver to support kernel-mode streaming of data for video capture, MPEG decoders, audio, DVD-ROM, and broadcast architectures.

*HID class driver to support input devices

*USB bus class driver

*IEEE 1394 bus class driver