You may be interested in my ALPS (Assembly Language
Programming System) 
Forgot to mention - the documentation is posted on my web site - in the Altair
section, under Documentation, subsection "My own software".
--
dave06a (at)    Dave Dunfield
dunfield (dot)  Firmware development services & tools: 
www.dunfield.com
com             Collector of vintage computing equipment:
                
http://www.parse.com/~ddunfield/museum/index.html