Hi, I got some old PC's. Theyre of the Intel i75 and around that range, they are like 75 MHz and 125 MHz cpu's. The problem is that they dont use PS/2 ports, so I cant use my PS/2 keyboard. There is at the back of these PC's what appears something that looks like an older PS/2 port but is much larger. Is this a port for the keyboard or the mouse. These things also have severa serial ports, I have a PS/2 to serial adapter. I tried this, but the BIOS still wont let me through as it says there is keyboard error. Help me please, how can I get through this?