Getting Started with DECTPU

2.6 Using OpenVMS EDIT/TPU Command Qualifiers

By default, EVE creates a new file if the specified input file does not exist. If you use /NOCREATE and specify an input file that does not exist, EVE aborts the editing session and returns you to the DCL command level. For example, if your default device and directory are DISK$:[USER] and you specify a nonexistent file, NEWFILE.DAT, your command and EVE’s response would be as follows:

$ EDIT/TPU/NOCREATE newfile.dat

Input file does not exist: DISK$:[USER]NEWFILE.DAT;

2.6.4 /DEBUG

/DEBUG[[=debug_source_filename]] /NODEBUG (default)

The /DEBUG qualifier determines whether DECTPU loads, compiles, and executes a file implementing a DECTPU debugger. If /DEBUG is specified, DECTPU reads, compiles, and executes the contents of a debugger file before executing the procedure TPU$INIT_PROCEDURE and before executing the command file.

For more information on the DECTPU initialization sequence, see Chapter 5.

By default, DECTPU does not load a debugger. If you specify that a debugger is to be loaded but do not supply a file specification, DECTPU loads the file SYS$SHARE:TPU$DEBUG.TPU.

For more information on how to use the default DECTPU debugger, see Chapter 5.

To use a debugger file other than the default, use the /DEBUG qualifier and specify the device, directory, and file name of the debugger to be used. If you specify only the file name, DECTPU searches SYS$SHARE for the file. You can define the logical name TPU$DEBUG to specify a file that contains a debugger program. Once you define this logical name, using /DEBUG without specifying a file calls the file specified by TPU$DEBUG.

2.6.5 /DISPLAY

/NODISPLAY

To choose the DECwindows or the non-DECwindows version of DECTPU, use the /DISPLAY qualifier on the DCL command line when you invoke DECTPU.

The /DISPLAY qualifier is optional. By default, DECTPU uses /DISPLAY=CHARACTER_CELL, regardless of whether you are running DECTPU on a workstation or a terminal.

If you specify /DISPLAY=CHARACTER_CELL, DECTPU uses its character-cell screen manager, which implements the non-DECwindows version of DECTPU by running in a DECterm terminal emulator or on a physical terminal.

If you specify /DISPLAY=DECWINDOWS, and if the DECwindows environment is available, DECTPU uses the DECwindows screen manager, which creates a DECwindows window in which to run DECTPU.

If you specify /DISPLAY=DECWINDOWS and the DECwindows environment is not available, DECTPU uses its character-cell screen manager to implement the non-DECwindows version of DECTPU.

For more information about the difference between a DECwindows window and a DECTPU window, see Chapter 5.

2–12Getting Started with DECTPU

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Compaq AA-PWCBD-TE manual 4 /DEBUG, 5 /DISPLAY, $ EDIT/TPU/NOCREATE newfile.dat, Nodisplay
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