Hoho, I think we have an assembler (zdas.exe) - "GNU assembler version %s (%s) using BFD version %s" !!! It uses cygwin though and it crashes when I start it with wine and no cygwin installed, how can that be? ;-) Comes with linker too (zdld.exe).
Here it is:
http://www.sendspace.com/file/nkeeji