i have centos 4.2. I have install a PCI card having serial port.when the os is booted it detects the new hardware ( serial port) .a device is also created /dev/ttyS0. the port works very goog on the same pc in windows XP. but when i connect any serial device to that port in linux it does not work.
in /proc/ioports
there is entry for that port as
0000-001f : dma1 0020-003f : pic1 0040-005f : timer 0060-006f : keyboard 0070-007f : rtc 0080-008f : dma page reg 00a0-00bf : pic2 00c0-00df : dma2 00f0-00ff : fpu 0170-0177 : ide1 01f0-01f7 : ide0 0376-0376 : ide1 03c0-03df : vga+ 03f6-03f6 : ide0 03f8-03ff : serial(auto) ---- > displayed here 0cf8-0cff : PCI conf1 c000-cfff : PCI Bus #01 c800-c8ff : Realtek Semiconductor Co., Ltd. RTL-8139 c800-c8ff : 8139too d800-d81f : PCI device 8086:24d3 (Intel Corp.) dc00-dc1f : PCI device 8086:24d2 (Intel Corp.) dc00-dc1f : usb-uhci e000-e01f : PCI device 8086:24d4 (Intel Corp.) e000-e01f : usb-uhci e400-e41f : PCI device 8086:24d7 (Intel Corp.) e400-e41f : usb-uhci e800-e81f : PCI device 8086:24de (Intel Corp.) e800-e81f : usb-uhci ec00-ec07 : PCI device 8086:2572 (Intel Corp.) ffa0-ffaf : PCI device 8086:24db (Intel Corp.)
please help me out is there any extra configuration to be done.