Sorry if we're beating this to death but I appreciate all the input... I installed a new motherboard, a FIC PA-2002. The mouse is ported to the serial port, COM1 as indicated on the board and in the BIOS. The problem apparently is with the cable, this was from the old MB in a reused case. I didn't realize different MBs used different pin configs, anyone know where one can buy the right cable for this board? No COM port cables came with it. I live in South Korea, so I would need it by mail. Tried loading a mouse driver in DOS, no luck. Again indicating the cable. And yes it's plugged in the #1 pin in the right location. The board can ten pins as does the cable connector although the port end has only nine. Tried two differnt serial mice, no luck. >BOB WRIGHT added: >As far as your MS_JMP vs. PS/2_JMP markings on the motherboard, >this would be straight forward. One setting is for a serial mouse and the >other for a PS/2 mouse. If you are using Com ports, you obviously do >not have a PS/2 mouse, but a serial mouse. Set this jumper accordingly. This is not as simple as it seems. There is a single row of 5 pins with either notation as each end. I'm beginning to think this is where I would plug in a 5 lead connector going to a PS/2 port. The manual gives no jumper settings for this area, it only indicates the location on the board. I'd venture to say the wrong cable is installed and will pursue that route with help from anyone who can help me find the right one. Thanks, Ray Hornung