RFC 90 (rfc90) - Page 2 of 6

CCN as a Network Service Center

RFC 90              CCN As a Network Service Center         January 1971


                      Also on the Multiplexor Channel are:

                      h) 2 card readers and 4 high speed printers at CCN;

                      i) Four 40,000 baud interfaces for CCI alphanumeric
                         TV display consoles (currently supporting 40
                         consoles);

                      j) Six data communication ports (3 dial @ 2000 baud,
                         1 dedicated @ 4800 baud, and 2 dedicated @ 50,000
                         baud) for remote batch entry terminals;

                      k) a Calcomp plotter;

                      l) an interface for BBS Teleputers (the Culler-Fried
                         system);

                      m) Ten dial ports for 2741 typewriter terminals;
                         and finally:

                      n) the IMP Interface

C. OPERATING SYSTEM

   The Model 91 operates under the IBM-supplied MVT version of OS/360,
   currently Release 18.6. This system contains a set of modifications
   developed at CCN for control of batch job flow. MVT is a realization
   of the general process model of multiprogramming, although this fact
   is obscured by IBM's terminology. For example, a process is called a
   task in MVT, while the fork primitive is called "ATTACH".

D. USER SOFTWARE

   1. Processors:

       CCN provides the following user software:

       a) The usual FORTRAN compilers (FORT G. FORT H. WATFOR);

       b) PL/1 (version 5) and PL/C (Cornell's student PL/1);

       c) Assembler G;

       d) IBM Algol F;

       e) IBM Linkage Editor F, and a fast in-core linkage editor written
          at CCN;




Braden