[Simh] CI750 tech docs and VAX firmware

[Johnny Eriksson]

> I don't think DECnet ever supported CI.  It certainly doesn't show
> up in the DECnet architecture specs anywhere.

>From the tops world, DNADLL.MAC, common to tops-10 and tops-20:

  IFN FTOPS10,<
	  FTCI==0                 ;Don't support CI20 circuits
	  FTDDP==FTNET            ;Support DDP (ANF-10) circuits
	  FTDTE==FTKL10           ;Support DTE circuits on KL10
	  FTNI==FTKL10            ;Support Ethernet circuits on KL10
	  FTKDP==FTKS10           ;Support DMR-11 circuits on KS10
	  FTDMR==FTKS10           ;Support DMR-11 circuits on KS10
  >; END IFN FTOPS10
  IFN FTOPS20,<
	  FTCI==-1                ;Support CI20 circuits
	  FTDDP==0                ;Don't support DDP (ANF-10) circuits
	  FTDTE==-1               ;Support DTE circuits
	  FTDMR==0                ;Don't support DMR-11 circuits
	  FTKDP==0                ;Don't support KDP-11 circuits
	  FTNI==-1                ;Support ethernet circuits
  >; END IFN FTOPS20

> 	paul

--Johnny