A
KA681/KA691/KA692/KA694 Firmware
Commands
This appendix provides information on console mode control characters and
firware commands for the CPU module.
A.1 Console I/O Mode Control Characters
In console I/O mode, several characters have special meaning:
RETURN
Also <CR>. The carriage return ends a command line. No action
is taken on a command until after it is terminated by a carriage
return. A null line terminated by a carriage return is treated as a
valid, null command. No action is taken, and the console prompts
for input. Carriage return is echoed as carriage return, line feed
(<CR><LF>).
RUBOUT
When you press
RUBOUT
, the console deletes the previously typed
character. The resulting display differs, depending on whether the
console is a video or a hardcopy terminal.
For hardcopy terminals, the console echoes a backslash (\), followed
by the deletion of the character. If you press additional rubouts, the
additional deleted characters are echoed. If you type a nonrubout
character, the console echoes another backslash, followed by the
character typed. The result is to echo the characters deleted,
surrounding them with backslashes. For example:
EXAMI;E
RUBOUT RUBOUT
NE<CR>
The console echoes: EXAMI;E\E;\NE<CR>
The console sees the command line: EXAMINE<CR>
For video terminals, the previous character is erased and the cursor
is restored to its previous position.
The console does not delete characters past the beginning of a
command line. If you press more rubouts than there are characters
on the line, the extra rubouts are ignored. A rubout entered on a
blank line is ignored.
KA681/KA691/KA692/KA694 Firmware Commands A–1
