Ports of  Linux to different architectures.
                                                                                
["68k"][[BR]]
["Alpha"][[BR]]
["ARM"][[BR]]
["PowerPC"][[BR]]
["SPARC"][[BR]]
["MIPS"][[BR]]
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[http://directory.google.com/Top/Computers/Software/Operating_Systems/Linux/Platforms/ Google Directory on Linux ports][[BR]]
[http://www.cyut.edu.tw/~ckhung/resource/linux_ports.html linux_ports.html][[BR]]
[http://webster.cs.ucr.edu/Page_asm/ArtOfAsm.html Art of Assembly Language Programming] - online textbook focussed on x86[[BR]]
[http://www.tldp.org/HOWTO/Assembly-HOWTO/ Linux Assembly HOWTO][[BR]]
[http://www.treblig.org/Linux_kernel_source_finder.html source for various ports][[BR]]
[http://www.osdl.org/archive/rddunlap/linux-port-25x.html Some Linux 2.5.x Porting help][[BR]]