VideoInOut for CRT Monitor BF561

用子程序设计的方法，分别把BUF字单元中的四个十六进制数转换为ASCII代码存入MAS开始的单元中，并在crt上显示。-Design method with the subroutine, BUF word units, respectively four hexadecimal number is converted to ASCII code into the beginning of the unit in the MAS and the crt display.