[parisc-linux] Re: e45 as a diskless server

[parisc-linux] Re: e45 as a diskless server

[Christoph Plattner]

Have you checked, that the E45 may have (my E55 definitively has) a
"wrong" pin out. It look to be the opposite pin assignment like a
modem, but further studies have shown, that it is non-standard.

I have soldered 8x adapters from 25-female to 25-female but with
the SUN compatible pin out ! This is the same as on the PC (25pin)
but female instead of male !

The following wirering is necessary to have a PC or SUN compatible
connector:
MUX side      PC/SUN like connector
	3.......2 
	2.......3 
	8.......4 
	22......5 
	20......6 
	7.......7 
	4.......8 
	6.......20 
	9.......22 

So you can use a simple NULL-Modem cable to connect the PC to the
PC/SUN compatible MUX connector.

For simple serial console you can use following:
	Only use pins 2,3 and 7, where 2=RX, 3=TX and 7=GND !
If you use NOT a UNIX-like system on the PC the bridge CTS and RTS
pins on the PC side.

On my E55 only port 0 (first connector) is used for the serial console.

With friendly regards
Christoph P.


Jussi Mäki wrote:
> 
> > Hello, I am back from vacation.
> >
> > In the moment, I have no valid kernel image (lifimage), as I hack
> > around with the E55 device findings. But if it not a problem for
> > you to have very much output in the kernel booting, you can use it !
> > (To say it again: The image is really original and good, it only
> > generates many lines of output while detecting the devices !!!).
> 
> I've had problems connecting the E45 console to my pc, currently i've only
> managed to use it with the 700/96 HP console, i'll look into that today.
> 
> I'll mail you the boot output if/when i get it working.

-- 
-------------------------------------------------------
private:	christoph.plattner@gmx.at
company:	christoph.plattner@alcatel.at

Re: [parisc-linux] Re: e45 as a diskless server

[Thibaut VARENE]

Le jeudi 25 juillet 2002, =E0 08:56 , Christoph Plattner a =E9crit :

> Have you checked, that the E45 may have (my E55 definitively has) a
> "wrong" pin out. It look to be the opposite pin assignment like a
> modem, but further studies have shown, that it is non-standard.
Yes; it is exactly the same on our E35.
We noticed that the cable connecting the MUX to the Console wasn't a
cross (null modem) one, but a 'straight' one instead.
We built a small 'cross-converter', basically a standard 25-25 serial
cable with female plugs and could then connect the MUX to any standard
serial port.


Thibaut VARENE
PA/Linux ESIEE Team
http://pateam.esiee.fr/