Recently, I acquired a small barebone with low power consumption (10 watts) in one box, based on a 300 MHz Vortex SX cpu. This one was pretty affordable, because of the missing co-processor, I assume, which makes a linux install a challenge. Nevertheless, in principle, it works and I post here a short howto, for the ones going the same path. Be warned, without the co-processor and only 128 MByte of RAM, the 2300 sx is suited for simple applications only.
The steps to achieve a running system where as follows: