[ih] Fwd: As Flag Day approaches at CMU

Noel Chiappa jnc at mercury.lcs.mit.edu
Sun Sep 7 16:11:52 PDT 2025


    > From: Guy Almes

    > So this was a real networked file system (and not just lots of FTP)?

Yes; the protocol was not, I think, documented in an RFC or anything;
although an ITS halp file:

  https://github.com/PDP-10/its/blob/master/doc/sysdoc/mldev.protoc

described it. It's basicalled a 'remote system call' protocol (perhaps
the first ever).


    > From: Jack Haverty

    > IIRC, it took advantage of an interprocess communication capability
    > called the "JOB/BOJ device", which enabled one program to open a
    > JOB device, and another program to open the corresponding BOJ (JOB
    > reversed) device, and send whatever they liked back and forth. But
    > I don't remember details.

Interesting that you don't - because you co-wrote the JOB/BOJ spec!

  The JOB/BOJ Device:  A Mechanism for Implementing Non-standard Devices
  Marc S. Seriff, Jack Haverty, Richard Stallman
  September 18, 1974
  https://github.com/PDP-10/its-vault/blob/master/files/sysdoc/jobonl.100

	Noel


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