FFA> FEXPM1 FILE-BLOCK
FFA> ( ffa -- nfa )  
<FORTH-83>
converts a pointer to the flag-field (FFA) to point then to the corresponding name-field (NFA) - in traditinal Forth this is the same address. pfe _can_ do different. 
 implementation-specific configure-dependent simulation:
   : FFA  1+ ;

reference: p4_ffa_from in ../src/forth-83.c:0458, export CO FFA>