Controlling Stop-A (Stop-L1) behavior
To enable Stop-A, prepend an asterisk, "*", to the following line in the /etc/system file.
#vi /etc/system
…
*set abort_enable = 0
OR
set abort_enable = 1
:wq!
#init 6
To disable Stop-A, add "set abort_enable = 0" to the /etc/system file
#vi /etc/system
…
set abort_enable =0
:wq!
#init 6