Comtrol RocketPort 550 uPCI Linux - Manual (Page 10)

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4. Driver Removal
There is generally no need to remove the device driver from the system.
If a card is no longer required, simply shutdown and power off the computer,
remove the card and reboot the system. If there are no longer any installed cards
then the driver will detect this condition unload itself. However, the driver files will
remain installed on the system’s hard disk.
At a later time the RocketPort 550 card(s) can be re-installed and the computer
restarted. The drivers will detect and operate the card(s).
5. Application Programming
The Application Programming Interface pertaining to the RocketPort 550 Linux
device driver is described in the Linux documentation for serial (tty) ports.