4. Configuring the si driver

Contributed by Nick Sayer . 25 March 1998.

The Specialix SI/XIO and SX multiport cards use the si driver. A single machine can have up to 4 host cards. The following host cards are supported:

Although the SX and SI/XIO host cards look markedly different, their functionality are basically the same. The host cards do not use I/O locations, but instead require a 32K chunk of memory. The factory configuration for ISA cards places this at 0xd0000-0xd7fff. They also require an IRQ. PCI cards will, of course, auto-configure themselves.

You can attach up to 4 external modules to each host card. The external modules contain either 4 or 8 serial ports. They come in the following varieties:

To configure an ISA host card, add the following line to your kernel configuration file, changing the numbers as appropriate:

device si0 at isa? iomem 0xd0000 irq 11

Valid IRQ numbers are 9, 10, 11, 12 and 15 for SX ISA host cards and 11, 12 and 15 for SI/XIO ISA host cards.

To configure an EISA or PCI host card, use this line:

device si0

After adding the configuration entry, rebuild and install your new kernel.


The following step, is not necessary if you are using devfs(5) in FreeBSD 5.X.

After rebooting with the new kernel, you need to make the device nodes in /dev. The MAKEDEV script will take care of this for you. Count how many total ports you have and type:

# cd /dev
# ./MAKEDEV ttyAnn cuaAnn

(where nn is the number of ports)

If you want login prompts to appear on these ports, you will need to add lines like this to /etc/ttys:

ttyA01  "/usr/libexec/getty std.9600"   vt100   on insecure

Change the terminal type as appropriate. For modems, dialup or unknown is fine.

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