  An important component of EPICS (Experimental Physics and Industrial Control
System) is iocCore, which is the core software in the IOC (input/output
controller) front-end processors. At ICALEPCS 1999 a paper was presented
describing plans to port iocCore to multiple operating systems. At that time
iocCore only supported vxWorks, but now it also supports RTEMS, Solaris, Linux,
and WinNT. This paper describes some key features of how iocCore supports
multiple operating systems.
