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∂14-JAN-76  1318	FTP: host HARV 
***** FTP mail from [7100,133] (PRENNER)

john-
i am now at uc/berkeley .   if you are in the bay area you can
call me at 642-7597.
the user level of my lisp simpley had primitives
environ , enveval and setenv.    they were essentially as 
described in ben and dannys paper.  i have some unreadable 
lecture notes and some diagrams of the structures used, but
no formal documentation of  the system exists.   
the major  implementation trick that i used was to use a
separate stack for the primitieves to execute on when they
were modifying the lisp stacks .   this helped clarify the
coding immmensely.    would be happy to 

talk about it anytime.
                              chuck prenner   (prenner @harv 10)