Alex Pufhal <[log in to unmask]> wrote: > I apologize in advance for not having more information > on this but I have a hardware issue posed to me which > I need to see if there's anything I can do. > > From what I know it's an NEC Laptop (age unknown) > running Windows95. > > The trackball apparently does not work right now and > the user has a serial mouse and a modem and they use > on this machine as well. The modem is external and > apparently there is only one serial port on this unit. Alex, Most laptops will accept an external pointing device through a PS/2 port, thus leaving the serial port free. Look for a mini-DIN (round 6 pin) connector and purchase an inexpensive PS/2 mouse for it. If not, then it may not be possible. There is no way to daisy-chain serial devices on a PC serial port. -- Russ Poffenberger Engineering Specialist Schlumberger Technologies ATE DOMAIN: [log in to unmask] 150 Baytech Drive San Jose, Ca. 95134 Voice: (408)586-6718 FAX: (408)586-4675 Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com