Browse Prior Art Database

CCN as a Network Service Center (RFC0090)

IP.com Disclosure Number: IPCOM000003949D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 6 page(s) / 8K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.T. Braden: AUTHOR

Related Documents

10.17487/RFC0090: DOI

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 36% of the total text.

Network Working Group 25 January 1971 Request for Comments: 90 R. T. Braden NIC 5707

CCN AS A NETWORK SERVICE CENTER

A. INTRODUCTION

CCN, the Campus Computing network of UCLA, will shortly be connected to the ARPA Network as a host of the "Service Center" type. The purpose of this RFC is to describe the hardware and software available at CCN and the services we are now planning to provide to other Network Hosts.

These services and their implementation priority were chosen in consultation with a particular site (RAND) which plans to use CCN via the Network. We would welcome requests and comments from other sites.

B. CCN HARDWARE

CCN operates an IBM 360/91KK, i.e., a Model 91 CPU with a 4 million byte fast memory.

CPU Speed: Highly program-dependent; 2-6 Mips, with 3 Mips as a useful average. The upper end of this range occurs heavy floating point in the inner loops. The decimal arithmetic operation of a 360 should be avoided as they are executed interpretively by the 91.

Memory Speed: Memory is interleaved 16 ways and extensively buffered. Effective memory fetch time is 600 ns in lower 2 million bytes, 900 ns in upper 2 million bytes.

I/O Con- figuration a) 6 2860 Selector Channels b) 1 2870 Multiplexor Channcl (with 16 control unit RPQ) c) 5 2314 Disk Storage Units (i.e., 40 disk drives). d) 1 2301 Drum (Systems residence and catalog only.) e) 5 (245x) 9 track tape drives (80O bpi) f) 3 (240x) 7 tracts tape drives (200/556/800 bpi) g) 1 2291 (Modified 2250 CRT) Operator/ Maintenance Console.

Braden [Page 1]

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 [Page 2]

RFC 90 CCN As a Network Service Center January 1971

f) Miscellaneous processors, including:

COBOL, SPI, XP7, META-5, SNOBOL, LISP 1.5, AUTOFLOW SIMSCRIPT 1.5, MIX (Knuth’s st...

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