This paper presents trial evaluation of a visual computer simulator in 2009-2011, which has been developed to play some roles of both instruction facility and learning tool simultaneously. And it illustrates an example of Computer Architecture education for University students and usage of e-Learning tool for Assembly Programming in order to realize effective and efficient ICT-based Practical Information Education. Evaluation for the visual simulator has been carried out not only as an instruction facility but also as a self-learning tool. The simulator can be used by teachers in their classroom lectures as well as by students for their making reports (essays). Such evaluated results are based on viewpoints from instruction of internal structure and behaviour in vonNeumann computer, Assembly Programming exercise, some essays by students with the simulator, and relationship between student's examination scores and usage of the simulator. The second half of the paper describes how to organize multiple server system for collaborative learning with the visual simulator. [For the full proceedings, see ED562127.]