VAX DIBOL–compatible OPEN with TT: and echoing characters
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WSupported on Windows
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USupported on Unix
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VSupported on OpenVMS
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System option #39 provides VAX DIBOL–compatible functionality for the following features:
- TT: on the OPEN statement
- Echoing control characters
If you set system option #39, the following changes to the Synergy runtime behavior occurs:
- If you open TT: while running from a command procedure, you only get input from the terminal, not the command procedure. The runtime no longer opens both SYS$INPUT: and SYS$OUTPUT:.
- On OpenVMS, the Synergy windowing API and UI Toolkit get input from the terminal instead of the command file.
- On OpenVMS, if you redirect SYS$INPUT from a command file, TTSTS will return a value of 1 in status and the WAIT subroutine will return position 2 in the event argument (both of which indicate that input is pending).
- The runtime echoes just the control symbol (^) by default, not control characters (for example, ^A and ^G) for characters entered by a READS statement. (Note that ^Z is an exception to this rule.)
Option #39 is automatically set when option #35 is set.
