Getting linux to recognize a digiboard

[Raja.Hayek@xxxxxxxxxxxxxx]

How do you get linux to recognize a
digiboard?

I have an ISA PC8 card, on which I am
trying to use the first 4 ports. Does anyone know what I should do to get
my OS to recognize the first 4 ports on the digiboard as /dev/ttyS4 ...
/dev/ttyS7?

I have gone through so many combinations
of setting the dip switches on the board, on to "mknod" and "setserial",
etc. But it doesn't seem to work.

After mknod, I used setserial, in order
to get the following result:

# setserial -g /dev/ttyS?
/dev/ttyS0, UART: 16550A, Port: 0x03f8,
IRQ: 4
/dev/ttyS1, UART: 16550A, Port: 0x02f8,
IRQ: 3
/dev/ttyS2, UART: unknown, Port: 0x03e8,
IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8,
IRQ: 3
/dev/ttyS4, UART: 16650, Port: 0x01a0,
IRQ: 2
/dev/ttyS5, UART: 16650, Port: 0x01a8,
IRQ: 2
/dev/ttyS6, UART: 16650, Port: 0x01b0,
IRQ: 2
/dev/ttyS7, UART: 16650, Port: 0x01b8,
IRQ: 2

I've tried the above settings with UART
16550A also.


I use a simple program which opens /dev/ttyS4
and /dev/ttyS5, writes into the former (which succeeds), and attempts to
read from the latter (which fails). The two ports are connected via a null
modem cable. The read() operation returns EAGAIN, indicating no data were
available at the port to read.

int main()
{
        int
res, fd1, fd2;
        char
buf1[255], buf2[255];

        fd1
= open("/dev/ttyS4", O_RDWR| O_NDELAY);
        fd2
= open("/dev/ttyS5", O_RDWR| O_NDELAY);

        sprintf(buf1,
"this is a test", sizeof("this is a test"));

        res
= write(fd1, buf1, strlen(buf1));
        res
= read(fd2, buf2, 5);

        return
0;
} 

The dip switch settings of the first
4 digiboard ports and for the irq match the settings of /dev/ttyS4 ...
/dev/ttyS7 as listed above.

However, I noticed that none of several
combinations of the setserial command did not affect the irq values listed
in /proc/interrupts.

TIA.

Raja Hayek.