This thesis describes the design and implementation of a MC6809 multi-computer communication system, which includes a hardware communication controller, with emphasis on the system’s software development. A communication program written in 6809 assembly language has been developed to interface each user and the controller. The communication programs acts as a postman, sending and taking messages for each user via the interrupt-driven sending and receiving software. A message is transmitted over a crossbar switched path, which is 8 bits wide, to increase the transmission rate and decrease dedicated CPU time. Every time MC6809 microcomputer in the system can send or receive a message. A sender can send a message to any number of receivers; however, a receiver can accept a message from one sender only. A sender can also receive a message while sending a message.
Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Masters Thesis (Open Access)
Song, Teh-Cheng, "Multi-Computer Communication with Crossbar Switches" (1986). Retrospective Theses and Dissertations. 4956.