I could write symbolic assembly within Nokolisp. Sentences were feeded straight into DEBUG and numbers were absolute addresses within COM-file. This is superfast fibonacci.

    (defun fib2
     (x)
     (AX-reg x)
     (assembly
      (CALL 272)
      (JMP 320)
      272
      (CMP AX , 2)
      (JC 304)
      (push AX)
      (sub ax , 1)
      (call 272)
      (MOV BX , AX)
      (POP AX)
      (PUSH BX)
      (sub ax , 2)
      (call 272)
      (pop BX)
      (add AX , BX)
      (RET)
      304
      (RET)
      320)
     (AX-reg))