There is a BCD unit connected to a numeric display; the BCD features a special 4-bit filter capable of detecting numbers greater than 9. If the value falls between 10 and 15, the filter performs the operation (number > 9) - 10, thereby yielding a digit for the units place and a 1 for the tens place. For instance, when the value 15 is entered, the filter applies the "-10" logic, setting the tens digit to 1 and the units digit to 5 (since 15 - 10 = 5).
On the other side, there is a set of four levers that allow for the input of a 4-bit number, which is then converted into the corresponding number shown on the display.
The creation is in the Mattone_888 plot because im Mattone_888 but i just change name in Eiurbl_
You simply need to set a 4-bit number using the four levers, and the BCD will automatically convert that 4-bit number into a decimal number.