The primary objective of this user’s manual is to define the functionality of the PowerPC
603? and PowerPC 603e? microprocessors for use by software and hardware developers.
Although the emphasis of this manual is upon the 603e, all of the information within
applies to both the 603 and 603e, except for those differences noted in Appendix C,
“PowerPC 603 Processor System Design and Programming Considerations.” Those readers
who are primarily interested in the 603 should begin with Appendix C.
In addition, this book describes the EC603e? microprocessor. The EC603e
microprocessor for embedded systems is functionally equivalent to the 603e with the
exception of the floating-point unit which is not supported on the EC603e microprocessor;
therefore, the term ‘EC603e’ is used only when it is necessary to distinguish functional
differences with the EC603e microprocessor.