Brian,

Do you have a copy of David Taite's 16c84 programmer?  I
don't recall that the 16c84 requires recursive programming.
This is required for the eproms but not the eeproms.

In case you don't have his program, I'll include a copy of the config
routine.

   prog_mode();
   command(LDCONF);
   out_word(fuses);
   for ( i=0; i<7; ++i )
     command(INCADD);
   command(LDPROG);
   out_word(fuses);
   command(BEGPRG);
   delay(PRGDLY);
   command(RDPROG);
   if ( fuses != (in_word()&0x1F) )
     quit("Fuse failure");

I hope this helps.  Good luck to you.

Yours,

Derrick Early