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Enabling Halt Key Functions (tta0_halts and tta1_halts)
Enabling Halt Key Functions (tta0_halts and tta1_halts)
Why Enable
To invoke console mode (halt the system), you must press the
Halt Key
Halt button on the system. Alternatively, you can invoke console
Functions?
mode from a terminal keyboard. You enable this ability by
setting an environment variable:
•
•
Possible
Possible settings for each environment variable are as follows:
Settings
tta0_halts
Setting
0
2
4 (default)
6
Display the current halt key settings for the two different ports
Your System's
as follows.
Current Halt
Key Settings
Displaying Your Console Terminal's Halt Key Settings
To display your console terminal keyboard's current halt key
settings, enter the following:
>>> show tta0_halts
tta0_halts
In this example, tta0_halts is set to 4:
4–18 Setting Environment Variables
tta0_halts allows you to invoke console mode from the
console terminal keyboard by pressing Ctrl/P or
tta1_halts allows you to invoke console mode from the
keyboard of a device connected to the auxiliary serial port by
pressing Ctrl/P.
tta1_halts
Setting
0 (default)
2
–
–
Return
4
Description
Ctrl/P and
are disabled.
Break
Ctrl/P is enabled.
is enabled.
Break
Both Ctrl/P and
are enabled.
Break
is enabled.
Break
.
Break
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