New files -- PowerPC supplement is based on the SPARC supplement.

This version has had some initial work done to convert it to
be PowerPC specific.

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+@c
+@c  COPYRIGHT (c) 1988-1996.
+@c  On-Line Applications Research Corporation (OAR).
+@c  All rights reserved.
+@c
+@c  $Id$
+@c
+
+@ifinfo
+@node Preface, CPU Model Dependent Features, 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.
+
+This document discusses the PowerPC architecture
+dependencies in this port of RTEMS.
+
+It is highly recommended that the PowerPC RTEMS
+application developer obtain and become familiar with the
+documentation for the processor being used as well as the
+specification for the revision of the PowerPC architecture which
+corresponds to that processor.
+
+@subheading PowerPC Architecture Documents
+
+For information on the PowerPC architecture, refer to
+the following documents available from Motorola
+(http://www.moto.com):
+
+@itemize @bullet
+@item some PowerPC document shere
+@end itemize
+
+@subheading PowerPC Processor Simulator Information
+
+PSIM is a program which emulates the Instruction Set Architecture
+of the PowerPC microprocessor family.  It is reely available in source
+code form under the terms of the GNU General Public License (version
+2 or later).  PSIM can be integrated with the GNU Debugger (gdb) to
+execute and debug PowerPC executables on non-PowerPC hosts.  PSIM 
+supports the addition of user provided device models which can be
+used to allow one to develop and debug embedded applications using
+the simulator.
+
+The latest version of PSIM is made available to the public via
+anonymous ftp at ftp://ftp.ci.com.au/pub/psim or
+ftp://cambridge.cygnus.com/pub/psim.  There is also a mailing list 
+at powerpc-psim@@ci.com.au.
+
+