My Linux box has 2 standard serial ports ttyS0 and ttyS1. I just added a ByteRunner PCI-800H that has 8 serial ports. Linux detects it without any problem and adds the 8 ports starting at ttyS4. I went into the BIOS setup and found only two serial ports. I wonder which devices keep the port ttyS2 and ttyS3 ? Thanks, DT