ROM files structure

[Black_Cat]

In K-MOUSE is not free space for change(=add) new port adress.

White space may occur if you delete the second address for reading the port #7FFD. The conflict, which may be possible while reading from two K-MOUSE Turbo 2008 does not arise, because their data bus is connected through resistors 150 + 150 = 300 ohms. Therefore, the second address for reading the port #7FFD not needed.