MEDM is a graphical user interface tool for designing and implementing control screens for EPICS-based control systems. Displays contain graphical objects that can display and/or change the values of EPICS process variables using the Channel Access network protocol. Supported graphical objects include buttons, meters, sliders, text displays/entries, and graphs.
MEDM has two modes of operation, EDIT and EXECUTE. Displays are created and edited in EDIT mode, and run in EXECUTE mode.
More information about MEDM can be found via its web-page on the EPICS site: http://www.aps.anl.gov/epics/extensions/medm/index.php
The extension distribution file should be unziped and untared in the extensions/src directory.