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Text File | 1995-09-14 | 2.9 KB | 56 lines | [TEXT/3278] |
-
- In the latest version of dataComet, installation of the "dataComet keyboard"
- keyboard layout is still desirable as long as you use the Option key to transmit
- PF keys (in IBM 3270 mode) or to trigger key macros.
-
- The reason is that the standard Macintosh keyboard layout treats the Option
- key as a special key when it is used with certain characters (Option-e, i,
- n, u, and `). When these key-combinations are pressed, the standard
- keyboard layout interprets the first character as a "diacritical mark,"
- i.e. a special mark that accents certain foreign characters, and interprets
- the next key pressed as the character you want to place the diacritical
- mark over, producing just one character.
-
- Thus, if you're using the standard keyboard layout and try to send PF5 in
- IBM 3270 mode by pressing Option-i, nothing happens on the first keystroke.
- If you press Option-i again, the keyboard layout will report to dataComet that
- Option-i has been pressed, and dataComet will send a PF5; the bad news is that
- the *next* keystroke may be remapped too! dataComet has no way of knowing
- what's going on, since the System is handling the remapping. After much
- research, it seems that the only reliable way to defeat this remapping is
- to install a different keyboard layout. (NCSA Telnet, e.g., also requires
- the installation of a keyboard layout).
-
- The "dataComet keyboard" keyboard layout, when installed in the
- System, treats all Option-key combinations as normal keys which are handed
- over to dataComet immediately without further interpretation by the System,
- avoiding confusion and possible errors which can result from handling some
- keys in a "special" way. Unfortunately, this resource can't be installed in
- the System automatically... sometimes the System file becomes "unstable"
- due to errors in the formatting of its resource fork, and the addition of
- the keyboard layout (or other resources) to the System folder can cause the
- System to go "over the edge" and crash when the Macintosh is restarted.
- Because of this risk, and the crucial importance of maintaining a clean
- System file, dataComet does not install this resource itself.
-
- With dataComet, you have two options:
-
- 1) Skip installing the "dataComet keyboard" resource.
- A dialog will appear when Comet is launched which states:
-
- "Please install the 'dataComet keyboard' keyboard layout in your
- System file by dragging it over the System icon and releasing the mouse
- button. To avoid this alert, turn off 'Remap Option key-combinations' in
- the Control Global dialog."
-
- If you follow these instructions, you will avoid the alert, and can enjoy
- the behavior of the standard keyboard layout!
-
- 2) Install the "dataComet keyboard" resource. All
- Option-key combinations will behave as a "naive" user would expect.
-
- We do regret the inconvenience associated with this System-level
- misfeature; the addition of the alert was prompted by concern about
- intermittent crashes with Word when the dataComet keyboard layout was not
- installed, which should now be fixed.
-