See, for source code and documentation, ftp://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/codar/ You'll find the original distribution files (from README.1ST): The Model 120 Calendar Clock Source Kit contains: 1) files to build the programs STIME and RTIME, which set the calendar clock and initialize your operating system's date and time, respectively, RTIME . COM RT11/TSX-Plus command file STIME . MAC Source for STIME for all RT11/TSX-Plus systems RTIME . MAC Source for RTIME for RT11 V4.0 and later (and TSX-Plus) 2) subroutines used by RTIME and STIME to read and set the calendar clock, CCSUBS . MAC Source for subroutines used by RTIME as well as the file CODAR.DIFF, which has the Y2K patches I did a few years back to the sources. Now that you've got TCP/IP working under RT-11, I'll also post my "NBSTIM" source - it goes out and queries a National Bureau of Standards time server for current UTC time and date over the network, converts it to local time, and uses it to check or set the -11's clocks. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927