GN_Nln, Send newline (CR/LF) to standard output

RST 20H, DEFW $2E09

IN:

     -

     Fc = 0

     Fc = 1
     A = error code:
          RC_HAND ($08), bad handle (during re-direction)
          RC_WP ($14), write protected (during re-direction)

     ..BCDEHL/IXIY same
     AF....../.... different

Error will only occur if rebinding has occurred.

Related calls:

GN_Soe, write string at extended address to standard output
GN_Sop, write string to standard output, local memory
OS_Out, write character to standard output