On Solaris I use stop+a to enter prom If terminal is serial console without stop key,what is the break key? I try
but no break key found.
CTRL+C of course doesn't work because only interrupt program
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A serial BREAK is essentially caused by the sending device holding the Tx line low (0V) for a period of time. It's not a character.
On a real terminal (eg a VT100) there was a key marked BREAK in order to do just that.
With terminal emulators and software it depends very much on the program you are using.
tip, for example, can send a BREAK with
~#. With C-Kermit you would press Control+\ followed by
Now there is a problem with BREAK... if the terminal was power cycled it sometimes caused the Sun machine to think a BREAK was being sent and would drop the machine into PROM mode. Not good. So an alternate key sequence was made possible.
kbd -a alternate
Which may also be set as a default in the
With alternate mode enabled the serial driver will treat the sequence
RETURN ~ Control+B
as a BREAK.
(That's "RETURN" then "~" then "Control+B")