I'm not sure if that's correct. I don't remember with crystal clarity all the details of how we got files to the Dover, but here's what I recall (take with 1/2 a grain of salt, my memory may have dropped some bits). To start with, there were different paths from the CHAOS and TCP/IP worlds. IIRC, there was a spooler on the Alto which ran the Dover, and the two worlds had separate paths to get to it. machine had the AI Lab's 3Mbit Ethernet interface - probably MIT-AI's CHAOS-11? If you look at the Macro-11 code from that, you should see it - IIRC it translated (on the fly) from CHAOS to EFTP, the PUP prototocol which the spooler ran 'natively'. in BCPL) to run in the spooler alongside the PUP software; it included a TFTP server, and people ran TFTP from TCP/IP machines to talk to it. (IP access to the 3Mbit Ethernet was via another UNIBUS Ethernet interface which was plugged into an IP router which I had written. The initial revision was in Macro-11; a massive kludge which used hairy macrology to produce N^2 discrete code paths, one for every pair of interfaces on the machine. Later that was junked, and replaced with the 'C Gateway' code.) I can, if people are interested, look on the MIT-CSR machine dump I have to see how it (a TCP/IP machine) printed on the Dover, to confirm that it used TFTP. I don't recall a role for any PDP-10 C code, though. I don't think there was a spooler anywhere except on the Dover's Alto. Where did that bit about the PDP-10 spooler in C come from, may I enquire? Was it a CMU thing, or something like that? Noel