3270-type Considerations

The following special considerations apply to 3270-type devices:

DC assigns each page of data in the line I/O session a sequential number starting with 1; page numbers are displayed at the bottom of the screen.
DC keeps all pages associated with a line I/O session in a scratch area unless otherwise requested. When the I/O session terminates, these pages remain in the scratch area where they can be viewed by the user and subsequently deleted. At any point, the user can display any page either by its position relative to the currently displayed page or by page number:
- Next page - Press PA1
- Previous page - Press PA2 or the CANC key.
- Specific page - Enter the desired page number following the words NEXT PAGE at the bottom of the screen and press Enter.
Unless the NOBACKPAGE option has been specified in a READ LINE FROM TERMINAL or WRITE LINE TO TERMINAL request, all pages processed during the I/O session remain available until the user signals completion of their use by pressing Enter with no request to see another page. If the page displayed is the last page of the session, DC deletes all pages associated with the current session, clears page header lines, and resets the current page number to one (1).

For further details regarding line mode DML statements, see the language-specific CA IDMS DML Reference Guide.