DRTM is described to a limited extent in the
Ivip-arch ID and to a much greater extent in the
Ivip-drtm ID.
Here is a much better explanation of some of the most important aspects
of DRTM, in a PDF file with new text and three diagrams (148 kbytes):
The text in the diagrams in the above PDF is in Courier, which I can't
fix right now. Here are three individual PDFs of the diagrams,
which are considerably easier to read due to using the correct font:
Below are gifs of the three diagrams. Here are TIFs:
Here is a PowerPoint (2003) slide-set with the three diagrams, and one with just the final diagram.