Resources on assembly placed on the web go way back,
there is a lot to find.

Recent:
Programming From The Ground Up. X86 32-bit Assembly, AT&T Syntax, Under Linux.
http://savannah.nongnu.org/projects/pgubook/
Power Basic, downloads on assembler X86.
http://www.powerbasic.com/support/do.../assembler.htm
Art Of Assembly.
http://webster.cs.ucr.edu/AoA/DOS/pdf/0_AoAPDF.html

Old:
Here is a list of the old files from programmers heaven for 80x86,
just search on google for one of the files.
http://www.synchrondata.com/pheaven/www/area64.htm

8086:
http://www.et.byu.edu/groups/ece425w...6Assembly.html

Different:
Archived collection of 80x86 assembly files.
http://cd.textfiles.com/blackphilesi.../CODING/80X86/