A distributed system consisting of several Z-80 microcomputers interconnected through a communication subnetwork (CS) is considered that is based on an Open System Interconnection (OSI) architecture model. This system is designed as an autonomous relay system for computer networking and internetworking and can be used not only for communication purposes but also to test control internal CS activity and the interfaces between different CSs. The authors investigate the reasons for using multicomputer devices to implement relay systems. Since many other multicomputer-based structures have been proposed in the literature, they also discuss our motivations for using the specialized multimicro structure proposed here. The authors next present the hardware structure of the proposed device, and then describe the basic software that allows processes implemented in the microboard to communicate with processes implemented in the same board or in other ones. Finally, they offer some preliminary measurements on the performance of a device serving as a gateway between a star subnetwork and an X. 25 subnetwork.
A MULTIMICROCOMPUTER-BASED STRUCTURE FOR COMPUTER NETWORKING
MIRABELLA, Orazio;
1985-01-01
Abstract
A distributed system consisting of several Z-80 microcomputers interconnected through a communication subnetwork (CS) is considered that is based on an Open System Interconnection (OSI) architecture model. This system is designed as an autonomous relay system for computer networking and internetworking and can be used not only for communication purposes but also to test control internal CS activity and the interfaces between different CSs. The authors investigate the reasons for using multicomputer devices to implement relay systems. Since many other multicomputer-based structures have been proposed in the literature, they also discuss our motivations for using the specialized multimicro structure proposed here. The authors next present the hardware structure of the proposed device, and then describe the basic software that allows processes implemented in the microboard to communicate with processes implemented in the same board or in other ones. Finally, they offer some preliminary measurements on the performance of a device serving as a gateway between a star subnetwork and an X. 25 subnetwork.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
