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Access Method for the Support of BSC Connected Remote Terminals under CMS

IP.com Disclosure Number: IPCOM000080399D
Original Publication Date: 1973-Dec-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 3 page(s) / 24K

Publishing Venue

IBM

Related People

Fusi, A: AUTHOR [+2]

Abstract

A package to support binary synchronous communication (BSC) transmission has been inserted under Cambridge Monitor System (CMS). It consists of one set of function programs that can be used either by FORTRAN or by ASSEMBLER programs. Moreover, a new command has been added to the CMS library. This command, similar to the standard CMS command OFFLINE, utilizes the BSC access method in order for files to be directed to or received from a remote terminal instead of the local unit record device. This permits, for time sharing services applications, besides interactive processing of jobs through low-speed start-stop lines and typewriter terminals, the remote job processing by users equipped with remote programmable or nonprogrammable terminals and a binary synchronous transmission line. Description of software components.

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Access Method for the Support of BSC Connected Remote Terminals under CMS

A package to support binary synchronous communication (BSC) transmission has been inserted under Cambridge Monitor System (CMS). It consists of one set of function programs that can be used either by FORTRAN or by ASSEMBLER programs. Moreover, a new command has been added to the CMS library. This command, similar to the standard CMS command OFFLINE, utilizes the BSC access method in order for files to be directed to or received from a remote terminal instead of the local unit record device. This permits, for time sharing services applications, besides interactive processing of jobs through low-speed start-stop lines and typewriter terminals, the remote job processing by users equipped with remote programmable or nonprogrammable terminals and a binary synchronous transmission line. Description of software components.

The structure of the access method is the following: - 1 control module BSCIO receives and controls the user FORTRAN program requests - 5 function modules BSCOPEN opens the line and starts communication

BSCLOSE closes the line and stops communication

BSCREAD performs write operation on the line (directed to the

remote print device)

BSCPUNCH performs write operation on the line (directed to the

remote end punch) - 3 auxiliary modules BSCSIO issues the basic I/O operations

CCWPROG contains all the channel programs

RSTART asks for remote terminal characteristics and saves

these

in a fixed position in the CMS nucleus

Description of commands

RSTART

Purpose:

The RSTART command defines the characteristics of the remote system which will be used by the REMOTE command. It must be issued before starting any operation on one BSC line. It has to be...