GN_Sdo, send date and time to standard output

RST 20H, DEFW $0E09

IN:

     HL = pointer to 6 byte date and time. First 3 bytes are time in
     internal format, second 3 bytes are date in internal format.

     -

     AFBCDEHL/IXIY same
     ......../.... different

Bugs:

Will fail if address pointer is in segment 2.

GN_Gmt, get (read) machine time in internal format
GN_Gtm, convert an ASCII string to a time in internal format
GN_Msc, miscellaneous time operations
GN_Pmt, put (set) machine time
GN_Ptm, write internal time as ASCII string
OS_Dly, delay a given period