Procedures to install Ubuntu's 7.04, build the kernel and make it work with our ISI UPCI card:
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1) Install the Ubuntu 7.04 distribution(linux-version-2.6.20-15)
Open the terminal and type:

- apt-get install ncurses-dev kernel-package linux-source build-essential minicom

- synaptic

- Then install the gcc 4.1 compiler from the link: Development->gcc-4.1 

2)Download the source code(Linux-2.6.20.15) from the link:

	2.1)http://www.kernel.org/pub/linux/kernel/v2.6/ and copy(Linux-2.6.20.15.tar.gz) to the /usr/src directory.

	2.2)untar it by:tar -xvf linux-2.6.20.15.tar.gz

	2.3)cd /usr/src/linux-2.6.20.15

	2.4)uname -r

3)cp /boot/config-2.6.20-15-generic .config

4)make menuconfig

	Device Drivers->Character Devices->Serial Drivers->
	->Maximum Number of 8250/16550 serial ports=48
	->Number of 8250/16550 serial ports to register at runtime=48

5)make-kpkg clean

6)make-kpkg --initrd --append-to-version=custom1 kernel_image kernel_headers

	After this, please check the following packages in /usr/src directory:

	7.1)linux-headers-2.6.20.15custom1_2.6.20.15custom1-10.00.Custom_i386.deb

	7.2)linux-image-2.6.20.15custom1_2.6.20.15custom1-10.00.Custom_i386.deb

7) Install the built packages:

	7.1)dpkg -i linux-headers-2.6.20.15custom1_2.6.20.15custom1-10.00.Custom_i386.deb

	7.2)dpkg -i linux-image-2.6.20.15custom1_2.6.20.15custom1-10.00.Custom_i386.deb

8)After installation, the built kernel image will appear in the grub's list.  Reboot the system and boot with the newly built kernel image

9)Device files (ttyS4-ttyS47) for the ISI Cards are successfully created.   We have tested 24 ports with 4 ISI cards (2 8-port + 2 4-port)