pa1 for attention

[najohnsn]

This PR enhances the PA1 key for situation in which the keyboard is locked.

Experience has show z/VM to not handle the normal ATTN (telnet BRK=243). However, it appears to expect PA1 even when the keyboard should otherwise be locked - PA1 serves as a general attention key. This behavior has been observed when accessing z/OS applications through z/VM.

[v1gnesh]

Hi Neil,

I meant to ask... do you happen to know what modifier I need to put in VS Code's settings.json to translate a key (say ` ) to PA1 or ATTN?

[najohnsn]

Hi Neil,

I meant to ask... do you happen to know what modifier I need to put in VS Code's settings.json to translate a key (say ` ) to PA1 or ATTN?

In VS Code, I think the only issue I've ever had was with function keys - because they are often trapped by VS Code itself instead of passing on to the terminal. For PA1 and ATTN:

Session: NONE> help keys
KEYS:
 ATTN           - Ctrl+C or Alt+A
 CLEAR          - Ctrl+L or Alt+C
 DROP session   - Ctrl+W
 ENTER          - Enter
 End            - End
 eraseeof       - Ctrl+K or Shift+End
 Escape         - Esc
 Next session   - Alt+PgDn
 Open URL       - Ctrl+O or mouse click
 PA1            - Alt+1 or Alt+Insert
 PA2            - Alt+2 or Alt+Home
 PA3            - Alt+3
 PF1-12         - F1-12
 PF13-24        - Shift+F1-12
 Prev session   - Alt+PgUp
 Word Left      - Alt+Left
 Word Right     - Alt+Right

Ctrl+C should work for ATTN unless connected through z/VM. Alt+1 should work for PA1. On MacOS, I believe that you would use Option+1 for PA1.

If you want some custom actionsin the VS Code terminal, you may want to check out these:

• https://code.visualstudio.com/docs/getstarted/keybindings
• https://code.visualstudio.com/docs/terminal/advanced#_keybinding-and-the-shell

[v1gnesh]

Morning!

Just realizing that I wanted to say Windows Terminal and not VS Code.
It's Terminal's settings.json that requires ANSI codes that I'm looking for (for PA1 and ATTN).

[najohnsn]

Morning!

Just realizing that I wanted to say Windows Terminal and not VS Code. It's Terminal's settings.json that requires ANSI codes that I'm looking for (for PA1 and ATTN).

I think you want to check out https://learn.microsoft.com/en-us/windows/terminal/customize-settings/actions#send-input. It describes how to bind a key to terminal input.

The terminal input value that you want for PA1 is documented in #53 in the expected code(s) column.