Binary recognition
By default, the compiler processes decimal data. If you want to use other decimal data, such as hexadecimal, octal or binary, you need to explicitly add the corresponding decimal identifier after the data.
Compile and link
The assembly language source program written with a text editor needs to compile links before it can run. If there are grammatical errors or other problems in the program, it cannot be compiled.
Debugging environment
In debugging environment, except instructions, data are all hexadecimal by default. Writing programs here, even beginners can easily operate simple instructions.
Instruction error
If the instruction "MOV AL, 45H" is written in the debugging environment, it will lead to an error. Because the largest letter in hexadecimal number is "f" or "f", "h" is not a valid letter in hexadecimal.
Correct writing
The correct spelling should be: "MOV· Al, 45 years old". 45 here is a hexadecimal representation, which is equivalent to 69 in decimal.