These two commands each have a different prompt sequence symbol, allowing the
operator to determine at which command level the terminal is operating.
(1) The symbols for the various levels are as follows:
System Command Symbol @.
q EDIT Command Symbol q
(2) The prompt sequence of the command levels are:
q Line-feed (the prompt sequence).
q Another carriage-return and line-feed.
(3) ABORT Switch
A System Command prompt sequence (@) is issued if the ABORT switch is operated.
(4) HLT Key
The prompt sequence for the current command level is issued when the HLT key is
q Upon entering the EXIT subcommand of either PARAMETER or EDIT, the system
reverts back into the System Command Level.
The Systems Command prompt sequence (@) is issued.