I checked out http://www.ncr.com
and, while I didn't find the c94/96 docs,
I did find:
 1) 53C94 C Demo Code, which includes
   Project files:
		C94.C 		Main body of code
		TARGET.C	Target Mode routines
		C94ISR.C	Interrupt Service Routine
		C94TEST.C	Automatic Test Module
		AT_DMA.C	hardware dependant DMA stuff
		AT_DMA.H
		C94AT.H		hardware addresses, global defines
		C94EV.H		external variables

 2) pascal version  of the above

 3) 53C90 Demo code, may be helpful

 4)  53C94 Board PAL Equations  ooh useful!
 
 5)  53CF96 Board Schematic (pcx format)
   (equally useful? eheh)


hope this proves useful!
nick mitchell