[rescue] Unwilling Crimson

Sheldon T. Hall shel at tandem.artell.net
Wed Jan 4 17:22:01 CST 2006


Quoth Mike Meredith ...
> On Wed, 04 Jan 2006 20:26:56 +0100, Joost van de Griek wrote:
>
> > Nothing comes up on a terminal (VT100, 9600-8N1) attached to any of
> > the serial ports, either, but we connected that with so many gender
> > changers and 25-9 converters that it may well have simply been
> > connected incorrectly.
> 
> As you've got some output there's a chance that it's nearly right, but
> the SGI 9-pin serial port has a different pinout to a 'standard' 9-pin
> serial port :-
> 
>      The DB-9 female serial port connectors, which are found on the
> CHALLENGE     and Onyx systems, have the following pin assignments.
> 
>                                 -------------------
>                                 \  5  4  3  2  1  /
>                                  \   9  8  7  6  /
>                                   ---------------
> 
>                          Pin | Name | Description
>                          ____|______|____________________
>                           2  | TD   | Transmit Data
>                           3  | RD   | Receive Data
>                           4  | RTS  | Request To Send
>                           5  | CTS  | Clear To Send
>                           7  | SG   | Signal Ground
>                           8  | DCD  | Data Carrier Detect
>                           9  | DTR  | Data Terminal Ready
> 
> Also make sure you don't have the keyboard plugged in.

And, I might add, when you hook up your terminal or whatever to the serial
port, try no handshaking at all on the terminal.  No RTS/CTS, no Xon/Xoff,
no nothing.  

-Shel
  



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