...
Notes
If B is zero on entry the address will not be treated as local. If your application is targeting OZ V4.2 or newer, use OS_Bout - its faster and uses 1 byte less in API call.
Related calls
GN_Nln, send newline (CR/LF) to standard output
GN_Sop, write string to standard output, local memory
OS_Bout, write null-terminated string block at (B)HL to standard output
OS_Out, write character to standard output
OS_Pout, write embedded null-terminated string at caller (PC) to standard output