마이크로컴퓨터들을 이용한 네트워크의 설계에 관한 연구 = A Study on the Design and Implementation of Network Using Microcomputers

다국어 초록 (Multilingual Abstract)

In this paper, the purpose of implementing the network system is ⅰ) to utilize effectively microcomputers ⅱ) to share their hardwares and softwares ⅲ) to reduce the execution time by parallel computation.
Therefore in order to implement the network structure for these purposes, Intelligent Network Unit (INU) has been designed and the network operating system has been developed.
This INU which uses CSMA/CD bus access scheme and HDLC protocol with data
transfer rate of 614 Kbps is connected to the nodes with RS-232C interface.
In order to control this network effectively, a network operating system for 8 bit microcomputer which is named as CP/M-KNET has been developed and MS-DOS for
16 bit microcomputers has been modified and included the RS-232C and Keyboard
hardware interrupt service routines.
Since the control program CP/M-KNET could be programmed in a ROM, it could be
used in any microcomputers which had no disk drive.
To test the performance of parallel computation, matrix multiplication programs have been executed in this network system.
Measured speedups in the parallel computation of matrix multiplications were 1.70∼1.81 and 2.86∼3.22 for the cases of 2 and 4-microcomputers in this system, respectively.