GN_Soe, write string at extended address to standard output

RST 20H, DEFW $3C09

IN:

     BHL = pointer to null-terminated string at extended address
     (B = 0, is interpreted as bank 0, not local...)

     Fc = 0
     BHL points to null terminator

     AFBCDE../IXIY same
     ......HL/.... different

If B is zero on entry the address will not be treated as local.

Related calls:

GN_Nln, send newline (CR/LF) to standard output
GN_Sop, write string to standard output, local memory
OS_Out, write character to standard output