HP 3000 Manuals HP 3000 Manuals
Hardware and MPE Clock Settings HP ALLBASE/4GL uses the standard C programming language library routines to determine the time. These routines rely on the system hardware clock (ISL time), rather than the local MPE/iXUX time setting. HP ALLBASE/4GL assumes the system hardware clock is set to Greenwich Mean Time (GMT) and uses the MPE/iX variable TZ to determine the offset for the local time zone. If the TZ variable is not defined, HP ALLBASE/4GL computes its correct value by obtaining the difference between the values of the hardware clock and the local MPE/iX time setting. Do not set TZ manually unless you are fully familiar with the way it is specified.