Routine to see whether buffer registers will fit in
                         the data file.  Store number of DF registers in A[X].
                         Recall buffer header
                         Move number of buffer reg
                         Clear garbage
                         Move to C[X]
                         Check for space in data file.
                         Enough return
                         Not enough go into display error routine.





















                         Routine to store key assignment or buffer registers in
                         data file.  Number of regs in C[X].
                         Clear garbage.


                         Hold number in B
                         Recall N
                         Place start address in A
                         Compute address of top register




                         Place top address in A[M]


                         Set up counter in A[X]
                         Clear B
                         Recall register header
                         Select this register
                         Read it