When designing digital systems, the stages of design debugging are important and laborious. Debugging is carried out on the manufactured prototype of the digital system. For debugging, in addition to the object being debugged, a set of debugging tests and the ability to organize debug modes on the system prototype are required, which allow, by analyzing intermediate variables, to localize an error in the project when an incorrect reaction of the system prototype to a debug test is detected. The advantages and disadvantages of design debugging on the hardware prototype of the entire digital system are considered, as well as the method for selecting a typical standard core. In the latter case, only prototypes of atypical interface circuits and blocks are made, which are connected to a previously manufactured and debugged standard core. The features of both approaches are analyzed. Classes of the most frequent applications of the considered methods are formulated.

Keywords: digital systems, design debugging, joint hardware and software debugging, project prototyping, debugging process components

Educational Internet portals are the important means of distance learning. The advantages of searching for educational resources using educational portals in comparison with universal search engines are shown. The main stages of the formation of educational Internet portals are described, methods are considered and the advantages of using attribute search in combination with contextual ones are shown. The importance of the correct formation of the system of classifiers of metadata and keywords, as well as their assignment to educational resources presented on the portal, for the effectiveness of attribute search is pointed out. The stages of the formation of the composition of educational portals, as well as methods of their promotion on the Internet are considered. A comparative analysis of the options for placing the educational resources themselves on portals or links to these resources posted on the websites of universities and other organizations is given.

Keywords: Internet portals, educational resources, Internet search, the formation of portals, the composition of portals, resource attributes