@c @c COPYRIGHT (c) 1988-2006. @c On-Line Applications Research Corporation (OAR). @c All rights reserved. @c @c $Id$ @c @ifinfo @node Preface, ARM Specific Information, Top, Top @end ifinfo @unnumbered Preface The Real Time Executive for Multiprocessor Systems (RTEMS) is designed to be portable across multiple processor architectures. However, the nature of real-time systems makes it essential that the application designer understand certain processor dependent implementation details. These processor dependencies include calling convention, board support package issues, interrupt processing, exact RTEMS memory requirements, performance data, header files, and the assembly language interface to the executive. Each chapter in this document discusses the details of how RTEMS was ported.