[parisc-linux] Modem communication, HP 730

[parisc-linux] Modem communication, HP 730

[Jon Sharp]

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Dear All,

I hope that I am sending this to an appropriate list.  To be honest I 
am running out of ideas.

I recently received a HP 730 which I am attempting to restore.  I am 
trying to install an external modem (V90 Velo Net ME220).  However, 
it is acting strangley.  It works fine (using minicom) at connection 
speeds of up to 19200, after that the modem fails to respond to AT 
commands altogether.

I have read through both the serial and modem how-tos in detail and 
tried what I could think of.  Including using a large range of 
different settings for setserial and stty.  Does anyone have any idea 
what I might be doing wrong?  One interesting point to note, I have 
no monitor or HIL keyboard and have been using the first serial port 
(A) for a console.

Any advice would be greatly received,

Jon Sharp

__ 
'The art of good lecturing is to transfer the information from my 
notes to your notes without it passing through eithers brain.'
Cambridge University Lecturer
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Re: [parisc-linux] Modem communication, HP 730

[Grant Grundler]

"Jon Sharp" wrote:
> It works fine (using minicom) at connection 
> speeds of up to 19200, after that the modem fails to respond to AT 
> commands altogether.

Does anyone know at which speeds HW handshaking is necessary?
730 is a pretty old machine.

grant

Re: [parisc-linux] Modem communication, HP 730

[Derek Engelhaupt]

I know the internal modem of the K-class is limited to 19200.  All of
the support modems we install for the systems are slowed down to 19200
even though they are 56k.  Coincidence?

derek


--- Grant Grundler <grundler@dsl2.external.hp.com> wrote:
> "Jon Sharp" wrote:
> > It works fine (using minicom) at connection 
> > speeds of up to 19200, after that the modem fails to respond to AT 
> > commands altogether.
> 
> Does anyone know at which speeds HW handshaking is necessary?
> 730 is a pretty old machine.
> 
> grant
> _______________________________________________
> parisc-linux mailing list
> parisc-linux@lists.parisc-linux.org
> http://lists.parisc-linux.org/mailman/listinfo/parisc-linux


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Re: [parisc-linux] Modem communication, HP 730

[Grant Grundler]

Derek Engelhaupt wrote:
> I know the internal modem of the K-class is limited to 19200.  All of
> the support modems we install for the systems are slowed down to 19200
> even though they are 56k.  Coincidence?

Maybe not.  Does the modem connect directly the console manager or
whatever it's called? That might be the limiting factor.

Could I cut off the goofy connector for K-class modem, solder on a DB-9
(or DB25) and have a cool external 56k Modem?
If so, I only need to know what the pinout is since power probably
comes through the cable as well.

I've seen so many of those go in the trash here.

grant

Re: [parisc-linux] Modem communication, HP 730

[Derek Engelhaupt]

Grant,

That thing you speak of is not the modem...the modem is inside the K. 
That thing is called a LAM.  Local Access Module.  It varied from
country to country so they don't have to change the modem only the LAM.
 The modem acctually plugs into the Core i/o board via a set of about
20 pins that actually come throught the modem board.  Very easy to bend
and get out of alignment.

derek

--- Grant Grundler <grundler@dsl2.external.hp.com> wrote:
> Derek Engelhaupt wrote:
> > I know the internal modem of the K-class is limited to 19200.  All
> of
> > the support modems we install for the systems are slowed down to
> 19200
> > even though they are 56k.  Coincidence?
> 
> Maybe not.  Does the modem connect directly the console manager or
> whatever it's called? That might be the limiting factor.
> 
> Could I cut off the goofy connector for K-class modem, solder on a
> DB-9
> (or DB25) and have a cool external 56k Modem?
> If so, I only need to know what the pinout is since power probably
> comes through the cable as well.
> 
> I've seen so many of those go in the trash here.
> 
> grant


__________________________________________________
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9-11: A tribute to the more than 3,000 lives lost
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[parisc-linux] E55

[Derek Engelhaupt]

I was just curious how far in the boot process you E55 guys get.  I
just tried to load the one I have in the office tonight.  I retrofitted
it with an A1703-60003 LAN/Console/SCSI card I pulled out of one of our
"crash and burn" H70 boxes.  It gets past the "console" message about
"if this is the last thing you see" then starts dumping the stacks and
ends in a Kernal error 15.  This card doesn't use the mux port to
connect the console it uses a PS/2 type connector to the card and a
DB25 connector to the terminal.  Just wanted to see how this compares
to the other E Series machines out there.

derek

__________________________________________________
Yahoo! - We Remember
9-11: A tribute to the more than 3,000 lives lost
http://dir.remember.yahoo.com/tribute

Re: [parisc-linux] E55

[Ryan Bradetich]

I have been playing with an E35 and I can get the boot to go farther
then that.  Right now the boot is failing somewhere between the LED
detection and the POSIX conformance testing by UNIFIX.  I do not
really care about this failure right now since I am really only
interested in the discovering the missing devices on these systems.

Tonight, I found the missing devices on the system and I am currently
working on figuring out how to integrate this discovery into the
bus walk code.  I hope to have a patch committed within the next day
or so which detects all the devices on the system.  After that I will
add this failure to my TODO list (if the ESIEE will still let me have
access to this system, but i am hoping that someone else will take the
challenge and find/fix the problem :))

Thanks,

- Ryan


On Mon, 2002-09-09 at 23:00, Derek Engelhaupt wrote:
> I was just curious how far in the boot process you E55 guys get.  I
> just tried to load the one I have in the office tonight.  I retrofitted
> it with an A1703-60003 LAN/Console/SCSI card I pulled out of one of our
> "crash and burn" H70 boxes.  It gets past the "console" message about
> "if this is the last thing you see" then starts dumping the stacks and
> ends in a Kernal error 15.  This card doesn't use the mux port to
> connect the console it uses a PS/2 type connector to the card and a
> DB25 connector to the terminal.  Just wanted to see how this compares
> to the other E Series machines out there.
> 
> derek
> 
> __________________________________________________
> Yahoo! - We Remember
> 9-11: A tribute to the more than 3,000 lives lost
> http://dir.remember.yahoo.com/tribute
> _______________________________________________
> parisc-linux mailing list
> parisc-linux@lists.parisc-linux.org
> http://lists.parisc-linux.org/mailman/listinfo/parisc-linux
> 

Re: [parisc-linux] E55

[Christoph Plattner]

I have the E55 as it is, without any additional card, 
and with my PDC Console driver I can completely boot
the system and work on it. BUT: Only via NFS Root,
as there is currently no SCSI support, no support
for the MUX (except port 0 as console with the PDC
driver) and without parallel (printer) port.

But Linux runs completely, including login, remote
X usage (xterm, etc...), access to the internet via
LAN, etc, ....

Hi Ryan, you have found the device ? This one on the
BC ? Sounds gooooooood !

Christoph


Derek Engelhaupt wrote:
> 
> I was just curious how far in the boot process you E55 guys get.  I
> just tried to load the one I have in the office tonight.  I retrofitted
> it with an A1703-60003 LAN/Console/SCSI card I pulled out of one of our
> "crash and burn" H70 boxes.  It gets past the "console" message about
> "if this is the last thing you see" then starts dumping the stacks and
> ends in a Kernal error 15.  This card doesn't use the mux port to
> connect the console it uses a PS/2 type connector to the card and a
> DB25 connector to the terminal.  Just wanted to see how this compares
> to the other E Series machines out there.
> 
> derek
> 
> __________________________________________________
> Yahoo! - We Remember
> 9-11: A tribute to the more than 3,000 lives lost
> http://dir.remember.yahoo.com/tribute
> _______________________________________________
> parisc-linux mailing list
> parisc-linux@lists.parisc-linux.org
> http://lists.parisc-linux.org/mailman/listinfo/parisc-linux

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