Writing Device driver for QNX4.25

Hi there. Can anyone help me where can I find information/documentation/examples about writing device drivers under qnx4.25. In general I’m interested in how to write custom network card driver. Could this information be found in web ? May be someone can privide me whith some manuals.
Thank you.
alex_centner@mail.ru

Unfortunately, the QNX4 network driver “DDK” (if one could call it that) is AFAIK proprietary and would require an NDA (and a strong stomach :slight_smile: to use.

QNX6 has a “real” network DDK.