usb. universal serial bus. If your MB supports it. Even cheaper, a two
port serial card with configurable irqs. Put 4 on 5 or 7. If you don't
run a soundcard. If you do, then a pnp card might work better, or jumper
it to use a different irq. Most new hardware will be able to work around
it. I don't know what type of mb you have. 73 de Curtis, kd4zkw.