Multiplexing the Ethernet Interface Among VAX/VMS Users.
Antonios K. Sakellaropoulos, Ioannis K. Kidoniefs · Defense Technical Information Center (DTIC) · 1983
This thesis focuses on the multiplexing of Ethernet interface among VAX 11/780 users. Since there is only the one channel that connects VAX 11/780 system to Ethernet Local Area Network, multiplexing of the NI1010 Unibus Ethernet Communication Controller is necessary in order to service multiple VAX users concurrently via Ethernet. This thesis describes a time division multiplexing of NI1010 controller, which can serve up to nine (9) separate VAX users. The developed software enables those users to communicate in any combination with one or more computer systems, which are connected to Ethernet as well. Two Microcomputer Development Systems (MDS) and VAX/VMS system were used for the implementation and testing of the project. The software is designed in such a way that those MDS's act very much like virtual VAX/VMS terminals. The whole system can easily be expanded to serve more than nine users.