PDP10: Correctly format the various data displayed in the debug output
PDP10: Fix UBA DMA debug output to use inverted byte and word masks
PDP10: Added missing UBA DMA debug output of the trailing bytes when a partial word is referenced at the end of a DMA transfer.

Added ascii and sixbit decoded contents displayed in the debug output.
PDP10: Add missing updates from prior commit
PDP11, VAX, PDP10: Fixed setting of register value reflecting return buffer address - Problem reported by R. Voorhorst
I1401: Fix to deal with instructions that are longer than 8 characters (from Van Snyder)
PDP10: Added a generic UBA debug routine to log NXM events.  Converted all internal NXM debug output to use this new routine.
PDP10: Initial code for 36bit DMA operations