/dev/ttyS2 and /dev/ttyS3

From: Brian J. McCarthy (ndeg.yqqlhkwgnd@bathspa.ac.uk)
Date: Thu Feb 03 2000 - 03:36:18 EET

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    I have tried to get these serial line added to my Linux machine (RH 6.1 with
    2.2.14). I do not understand what the trouble is.

    Output from setserial
    =========================================================

    [root@gateway rc.d]# setserial -gav /dev/ttyS?
    /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
            Baud_base: 115200, close_delay: 50, divisor: 0
            closing_wait: 3000, closing_wait2: infinte
            Flags: spd_normal skip_test

    /dev/ttyS1, Line 1, UART: 16550A, Port: 0x02f8, IRQ: 3
            Baud_base: 115200, close_delay: 50, divisor: 0
            closing_wait: 3000, closing_wait2: infinte
            Flags: spd_normal skip_test

    /dev/ttyS2: Device or resource busy
    /dev/ttyS3: Device or resource busy

    =========================================================

    The card I am adding is http://www.siig.com/io/i_o_expander_4s.html.

    I am setting port A to 3E8/IRQ4 and port B to 2E8/IRQ3. The unboard Serial
    ports are 3F8/IRQ4 and 2F8/IRQ3. This should be the defaul config. Will
    interrupt sharing work accross different cards? What could I do to enable
    these serial ports ??

    Brian McCarthy
    N7TUQ



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