Please go through this post if you are new to microprocessors:
This application allows users to program in machine code (on Intel 8085). It can be greatly useful for students and hobbyists for learning and understanding the working of the 8085 microprocessor. Efforts have been made to make the application very user-friendly and intuitive while also providing some very useful features.
Note: Please use HLT (76) as the stopping command for a program. (A few 8085 kits have RST 5 (EF) or RST 1 (CF) as the stopping command)