EPICS application for accessing VME devices on VxWorks

EPICS (Experimental Physics and Industrial Control System) is a set of software tools, libraries, and applications developed collaboratively by Argonne National Laboratory and Los Alamos National Laboratory of America. PCI is a local bus for attaching hardware devices in a computer. VME is a synchronous bus, stable and reliable. It is widely used in EPICS control systems. Developing EPICS drivers for VME bus needs the knowledge of computer mechanisms such as memory mapping. So we need to study such contents. It describes the principle and method on how to access VME devices on the real-time operating system VxWorks and the EPICS support for VME. (authors)