This system is the ideal companion experimental device for courses such as "MCS-51 Microcontroller Principles and Interfaces," "Microcontroller Control Technology," "Automation Control," and "EDA." Designed with compact size, multifunctionality, and easy expansion in mind, the mainboard focuses on the basic experiments in the "DJ-51 Series Microcontroller Experiment Guide," adding address bus, data bus, and control bus leads and expansion units (areas). This allows schools to customize their needs with a variety of optional expansion modules. This provides an excellent experimental development environment for teaching experiments, course design, and graduation projects in various institutions, and is a valuable aid for researchers and developers.

1. Clear program;
2. Split word program;
3. Spell word program;
4. Data area transfer subroutine;
5. Data sorting experiment;
6. Find the number of identical data;
7. Unsigned double-byte fast multiplication subroutine;
8. Multi-branch program;
9. Pulse counting experiment;
10. Computer clock experiment.