ABSTRACT RTCLOK V01.17 and TSXCLK V01.19 Revised 11-Nov-91. RTCLOK automatically sets the date and time at boot-up; and can reset the date and time as required. Since time is lost during the TSX boot process, the TSXCLK variant is also included. These programs allow the Heath/Zenith GCW1000 Most Accurate Clock to properly set the system date and time via DL(V)11 type serial interface lines.