x86 assembly language resources:

Randal Hyde, Art of Assembly, http://webster.cs.ucr.edu

Op-code chart, IntelCodeTable.pdf .

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclang/html/_core_assembler_.28.inline.29_.topics.asp

http://www.asmcommunity.net

Linux specific:

http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html, (local copy)

http://www.delorie.com/djgpp/doc/brennan/brennan_att_inline_djgpp.html, (local copy)

http://www.faqs.org/docs/Linux-HOWTO/Assembly-HOWTO.html

http://asm.sourceforge.net/articles/linasm.html

http://www-128.ibm.com/developerworks/linux/library/l-ia.html?dwzone=linux