This tutorial discusses how to write device drivers for computer systems running the DEC OSF/1 operating systems. By following the task oriented approach the reader will acquire the skills necessary to write OSF-based device drivers. Mastery of the concepts and examples in this book provide a fundamental background for writing a variety of device drivers. As an essential tool for users of the DEC OSF/1 operating system as well as for systems engineers interested in writing UNIX-based device drivers Writing Device Drivers Tutorial and Reference discusses how to write device drivers for computer systems