indicates that this command is described in the
is described in the
indicates that this command invokes a text
an
license fee.
from
publications.
machine, the terminal is idle, and the virtual machine is receptive for
input. However, if
your typewriter terminal keyboard is locked, you must signal your
virtual machine via an attention interruption. The system acknowledges
the interruption by unlocking the keyboard. Now you can enter commands.
If your terminal is a display device, there is no problem of entering
commands while the virtual machine is busy as its keyboard remains
unlOCked for additional command input. Note that in these circumstances
the command
that is currently being executed completes. If more commands are
entered than can be handled by
at the display terminal.
In addition to the commands listed in Figures 3 and
seven
different manner from the others. They may be entered while another
command is being executed by pressing the Attention key (or its
equivalent), and they are executed immediately. The
are: