This book contains two parts: A developer"s guide on how to write the software for the device driver for a device connected and AXP (Alpha) processor and how to load the driver into the OpenVMS AXP operating system. A reference manual section of the book describes the data structures, macros, and routines used in OpenVMS AXP device driver programming. Throughout the book, examples of actual code illustrate the key concepts. The working sample device driver demonstrates an actual OpenVMS Alpha device driver written in C. Introduces the components of OpenVMS Alpha device drivers and explains their role in the operating system. Chapters cover how to code, compile, link, and load drivers into the OpenVMS Alpha operating system. Provides definitive information about writing device drivers in the C programming language for a device connected to an Alpha processor.