Re: Attempting To Build NOSC and BBN UNIXs + ARPANET code - TUHS

11 Oct 2022

Tom Perrine wrote:
...
  A specific example of the VDH interface was the IMP at
NOSC.

 IIRC it had 4 ports? 
Normally yes (depending on the hardware configuration).

...
  One was a local connection to the machine at NOSC in
the same room/building.
 One was a VDH to UCSD
 One was a VDH to LOGICON - the connection at the LOGICON end was a "56K
 wideband modem", which was a little larger than a 2-drawer file cabinet. I
 also seem to recall that the power supply had tubes.
 Not sure where the 4th port went - I only saw the UCSD and LOGICON ends in
 person. 
Maybe this information for IMP 3 and 35 from 1979 can jog your memory.

HOST NOSC-SECURE2,      0/35,USER,TENEX,PDP10,[USC-ISIR1,ISIR1]
HOST LOGICON,           1/35,USER,UNIX,PDP11
HOST ACCAT-TIP,         2/35,USER,TIP,H316,[NELC-TIP]
HOST NOSC-SECURE3,      3/35,USER,UNIX,PDP11
HOST NOSC-CC,           0/3,SERVER,,UNIVAC-1110,[NUC-CC,NOSC-ELF]
HOST NOSC-SECURE1,      1/3,SERVER,UNIX,PDP11,[NUC-SECURE]
HOST NOSC-SDL,          2/3,SERVER,UNIX,PDP11,[NELC-ELF,NELC]
HOST NWC,               3/3,SERVER,EXEC-8,UNIVAC-1110
HOST NPRDC-11,          4/3,SERVER,UNIX,PDP11