[parisc-linux] How to set serial console on 712 (fwd)

Matt Taggart taggart@rascal.fc.hp.com
Thu, 23 Dec 1999 12:31:55 -0700

Matthew Wilcox writes...

 >On Thu, Dec 23, 1999 at 07:45:00AM -0800, Bill Katz William" wrote:
 >> |How do I set the console on my 712 to be the serial port, not the 
 >> |display?
 >> |
 >> |Thanks
 >> |
 >> Boot to ISL and use the conspath
 >> command to change the console back to rs232.  The command to use is:
 >> serial
 >>         conspath 2/0/4.643
 >> graphics
 >>         conspath 1/0/0.0
 >This contradicts the PA-RISC Booting HOWTO:
 > How can I change the boot console to serial on a 712?
 >Unfortunately, you can't. Although 712s are configured for in-house HP
 >development to use serial console, this configuration isn't supported
 >in the field. You have to use a graphics console for 712s.
 >I'd like to know if this needs to be corrected.

The above statement about serial console not being "supported" on 712 is 
correct. That doesn't mean you can't do it. Here are the instructions,


An RS-232 console is not a supported feature in the 712 products. For this 
reason users cannot select the RS-232 port as a console from the BOOT_ADMIN 

These instructions will configure an RS-232 console with 9600 Baud, 8 data 
bits, 1 stop bit, and no parity.


NOTE: If the following instructions are not entered correctly, your system 
may be left in an un-usable state. Contact support to "dagger" your system 
in this case.

     Power up the 712 system. 
     Press (ESCAPE) during boot to abort auto booting the system. 
     At the BOOT_ADMIN> prompt, use the boot command and the isl keyword.
        This will stop the boot sequence at ISL instead of booting to the 
     For example: 'boot scsi.6 isl' 
     At the ISL> prompt, type 'conspath 2/0/4.0x283' 
     At the ISL> prompt, type 'disp' and verify console path is:
        (hex) 2/0/ 
     If necessary re-type the conspath command above. 
     Connect an RS-232 terminal to the system. 
     Power cycle the system to bring it up on an RS-232 console. 

As it indicates above, *BE VERY CAREFUL* or you can hose your system. If 
do, I have one of the "dagger" cards that can be loaned out to fix it.

Matt Taggart

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From: Jason Eckhardt <jason@equator.com>
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Subject: [hppa-linux] Boot #4 and source on ftp site
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Boot test #4: This is essentially the same code as #3 but I have taken
out some delays, modified the cache flush routines, and turned
verbose (debug) mode back on. I want to make sure that not having the delays
makes no difference and that no characters get dropped when there is a lot
of text (as in debug mode). Please let me know if the test still passes
as before. Hopefully this will be the last test for a while. Kernel work
comes next.

I have uploaded the binary as well as a new source drop to the ftp site. The
source is now GPL'd and a detailed README is included which gives an overview
of the boot code operation. This source supersedes any previous source you
may have laying around.

ftp from sod.res.cmu.edu:/pub/parisc/hilo
  boot_rel_0.2.tar.gz        The latest source code and documentation.
  bootstrap_4.bin.gz         Bootstrap binary #4. 

Jason Eckhardt.

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