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Communication Control System for Multidrop Line

IP.com Disclosure Number: IPCOM000040137D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Moriguchi, S Yokoo, S [+details]

Abstract

In a terminal control system consisting of a main controller and a plurality of auxiliary controllers connected to each other through multidrop serial communication lines, each of the auxiliary controllers comprises a communication control unit connected to the serial communication line for controlling the communication with the main controller and a device control unit connected to the associated I/O device through a device control circuit for controlling the device and provided with plural RAMs each being selectively connectable with the communication control unit and device control unit through a RAM/BUS switch logic.