I may have asked before on this list if anyone had the document that describes the
differences between DDCMP V3 (as implemented in the DMC-11) and DDCMP V4.
I just found it. It is Appendix I of the DMC-11 microprocessor technical manual,
EK-DMCMP-TM-002 (on Bitsavers).
Just in case anyone cares...
paul