Since RVDS 2.0, this interface has been deprecated, and support for it was dropped completely in RVDS 3.1. http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka8256.html
The Keil tools still support connection to RDI targets.
In place of RDI, ARM has introduced, the following interfaces:
* RDDI: The "Remote Device Debug Interface", for connections to RealView ICE. Please see
http://www.arm.com …DevTools/RDDIRVI.html.
* CADI: The "Cycle Accurate Debug Interface", for connections to models
* AGDI: For connections to Keil uVision.