There is ANF10 code for PDP11 that run on 40's or 34's. Ah. I thought the DN92 was somehow related to ANF10. Did ever anything but TOPS-10 support ANF10? (Whatever code ran on the FE RSX system don't count... :) ) There are three DEC things that run on the FE PDP11: rsx20f is the stuff that controls the KL and loads microcode and acts as the connection for local terminal links. (remember the dte is capable of 50kbit/s total...) mcb rsx based decnet phase 3 frontend, while the host was phase 4.. abortion.. that's why we did the DDP devices.. anf10 Frontend code, don't use a OS, has a small kernel by itself. You could not mix this, so your minimum was 2 PDP11's and one is in the main CPU. Then there is MinITS for the frontend of MC KL10A and DL10 The PDP11 code can talk DDCMP over ASYNC or SYNC interfaces, DQ11, DMR11, DMC11. So you can do Wan things. In Sweden we had DEC10's in Stockholm and Linkoping networked with a 9.6K sync link. The DEC2020 talks DDCP with a DUP11 and a KMC (I think it was KMC, unibus card with microdode that basically did DDCMP.) Yeah, I seem to remember that the KMC was the card with DDCMP on board. Anf-10 has link-state routing like OSPF/ISIS but only one area. I was very ignorant at the time I played with this stuff. Exactly what could you do over ANF10? I remember connecting between machines (interactive terminal sessions), but were there file transfer protocols, or network based filesystems? Other features? It depends.. There where sockets/services, but different nodes supports different things. A shell is a socket/service only on the mainframes and the X29/X25 gateway. MCR shell TSK process-process (file access is on top of this) LPT line printer CDR card reader CDP card punch TTY terminal line (very advanced "Telnet") DDP tunnel used to carry IP and DECnet to front-end PLT plotter RDX remote data entry terminal in netdev.mac... TITLE NETCDR - NETWORK CARD READER ROUTINES - V001 TITLE NETDDP - NETWORK "DDCMP" DEVICE SERVICE ROUTINES - V001 TITLE NETLPT - NETWORK LINE PRINTER ROUTINES - V001 TITLE NETMCR - NETWORK MONITOR CONTROL ROUTINES VERSION 001 TITLE NETPLT - NETWORK PLOTTER ROUTINES - V001 TITLE NETRDX - REMOTE DATA ENTRY SERVICE ROUTINE TO SUPPORT MCS10 - V001 TITLE NETTSK - TASK TO TASK COMMUNICATION SERVICE ROUTINE - V001 TITLE NETVTM - VIRTUAL TERMINAL ROUTINES VERSION 001 -P