I have made a program with PIC12C508,that connect with the PS/2 mouse,as you see, there are michinery mouse and phtoelectricity mouse. My program sent the mouse tow orders: one is 0XFF to reset the PS/2 mouse, one is 0XF4 to enable the mouse. However, when the PIC12C508 connect with the machinery moues, the program works, but when I connect the photoelectricity mouse,the program can not receive the mouse's data? Can anyone tell me why? what can I do to make my program to work with photoelectricity mouse??