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.

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.