This paper presents the usabilities of a newly developed web based virtual laboratory package as a self-learning tool in association with online courses with the facility for evaluation of user assignments without the intervention of the instructor. Knowledge of the features and internal working of the COLDVL tool would be of interest to both students and instructors of logic design and computer organisation the evaluation of this tool would be of interest to the instructors. Its impact on learning has been treated through analysing student performance taking into account various learning issues and found to support the utility of this tool. This tool has been successfully deployed at an academic institute to support experiments forming a part of courses. It also provides a repertoire of components and supporting backend techniques such as efficient simulation, Huffman model identification and unknown logic value resolution to address specific learning issues pertaining to these subjects. This tool comprises a hierarchical logic module level editor and a logic simulator at the back end. This paper presents the COLDVL tool with novel features to support implementation of experiments related to logic design and computer organisation, which are core courses in the computing science discipline, along with a study for its support towards learning.
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