5 What is setserial?

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setserial is a program which allows you to look at and change various attributes of a serial device, including its port, its IRQ, and other serial port options. It was written by Ted T'so <tytso@athena,mit.edu>. The newest version is 2.10, and can be found on the Linux FTP sites. You can find out what version you have by running setserial with no arguments.

On boot, only the ttyS{0-3} ports are configured, using the default IRQ of 4 and 3. So, if you have any other serial ports provided by other boards (such as an AST Fourport), or if ttyS{0-3} have a non-standard IRQ, you must use this program in order to configure those serial ports. For the full listing of options, consult the man page.

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