NAME
        WriteBattMem -- write a bitstring to nonvolatile ram.  (v36)

   SYNOPSIS
        Error = WriteBattMem( Buffer, Offset, Len )
        D0                    A0      D0      D1

        ULONG WriteBattMem( aptr, ulong, ulong );

   FUNCTION
        write a bitstring to the nonvolatile ram.

   INPUTS
        Buffer          Where to get the bitstring.
        Offset          Bit offset of first bit to write.
        Len             Length of bitstring to write.

   RESULTS
        Error           Zero if no error.

   NOTES
        The battery-backed memory is checksummed. If a checksum error
        is detected, all bits in the battery-backed memory are
        silently set to zero.

        Partial byte writes (less than 8 bits) result in the bits
        written being read from the low-order bits of the source byte.

   SEE ALSO

   BUGS