Hi,
On 12 June 2011 18:57, <arcarlini at iee.org> wrote:
Simon Fryer [fryers at
gmail.com] wrote:
I have a DECServer 90L+ that I am trying to use
as a terminal
server. After some time, I managed to get it powered up and
started to look for MOP boot requests. However, the expected,
give me a MOP boot image broadcast on the network did not
occur. The Ethernet frames that I see give the impression
that the DECServer is looking for a specific machine on the
network. I am also not getting any output on the first serial
port (MMJ to MMJ cable connected to a VT320)[1].
There's (at least) one decserver that has the smarts (such as they are)
in ROM and doesn't MOP load (or, at least, doesn't need to ... I don't
recall if it is possible to upload newer firmware on demand).
I have a feeling that the DS90L+ may be the one.
After reading the manual, I think the DS90L+ would appear to be the
one that has it all in NVRAM.
You should be able to plug into any of the ports and
hit RETURN (perhaps
a few times in quick succession) and have it talk to you.
Well, in theory. I have just checked and confirmed that my terminal is
setting some voltage and the voltage changes slightly with a couple of
hits of the return key. However the serial activity LED on the front
of the 90L+ does not seem to blink - which according to the manual,
*should* when there is activity on the serial ports.
Not knowing the history of this DECServer (I have had it a few years
and I can not remember the source) I am not sure if there is a
configuration issue, or a hardware issue.
I guess it is time to look into it a little more.
Thanks.
Simon
--
------------------------------------------------------------------------
"Well, an engineer is not concerned with the truth; that is left to
philosophers and theologians: the prime concern of an engineer is
the utility of the final product."
Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh