Based on the variant given by the teacher, develop and explore the operation of a data exchange software complex
in interrupt mode. The main program should modify the contents of a specified memory cell (X), which should be
represented as a signed number. The range of allowable values for changing X should be limited by a given function
F(X) and the design features of the data register of external device(ВУ) (8-bit signed representation).
The interrupt processing program should output the modified value of X to the data register of external device(ВУ)
according to the assignment variant, as well as ignore all unprocessed interrupts.
Вводить с `ВУ Клавиатура` символы.
Каждый введённый символ должен тут же отображаться на `ВУ Текстовый принтер`(прерывание).
Если ввести `echo something`, то команда должна отработать как echo в линуксе, т.е. вывести `something`.
