Since EDT as of V17.0A can be run in two operating modes (see section “Introduction tothe EDT operating modes”), the EDT start commands have been extended accordingly.
When starting EDT it is possible to decide whether to opt for compatibility and do without the functional extensions – i.e. start EDT in compatibility mode – or to make use of the new functions and accept the presence of certain incompatibilities – i.e. start EDT in Unicode mode.
It is also possible to use EDT statements after start-up to switch between compatibility mode and Unicode mode.
It is always essential to start in Unicode mode if you need to make use of the functional extensions at the moment EDT is initialized, e.g. when running the EDT start procedure (see “EDT start procedure”).
For details of the functional extensions and incompatibilities in Unicode mode and the use of EDT statements to switch between modes, see section “Introduction to the EDT operating modes” and chapter “Compatibility mode”.
The start process in Unicode mode is described below.
For information on starting EDT in compatibility mode, see section “Compatibility mode”.