Quote Originally Posted by iugmoh View Post
I will thank you another time for your patience, I understand that you are meaning that I can replace my barcode reader by a keyboard and pressing the same ID number to know how each number is encoding

oky i will try this
That would be my bet.
So in the end, you're project would be (with enough info in tables or whatever) a capable PS/2 keyboard reader.
But I'm guessing here...and it makes sense to me.

Push 1 once...write down the sequence of bits returned...push 1 again, compare the sequence to before
then push 2 once, write down that sequence, etc.etc. and so on...

What do you get on the display for a single press of the number 1 on the keyboard, one press, one release of that single key...not the numeric keypad, but the number 1 above the Q?