Re: VT420 Console - a quick question

From: Kevin Handy (kth_at_srv.net)
Date: 07/21/05 

Date: Thu, 21 Jul 2005 10:44:45 -0600

Tomasz Dryjanski wrote:
> Hi All,
>
> I'm trying to deploy an Alpha Server 1000, 4/266. I've connected
> a VT420 terminal via the DEC-423 port, and I've set the config
> as recommended, i.e. Transmit=Receive=9600, 8 Bits No Parity,
> 1 Stop Bit, etc. Instead of the startup messages, I can see some
> garbage like
> p~~~~~~~~p~x~~|~~~~~~~~~~'~~|~~ etc.
>
> I've tried several different settings, with various types of garbage
> as the result (some of it contained reversed '?', some contained
> mainly umlauts), but this is not what I'd like.
>
> Can you please advise? Alas, I need a quick solution...
>

1. Bad/wrong cable. Is your cable wired backwards?
There are two ways to build a MMJ cable. One is
null, and one is straight-through. Hold the two cable
ends side-by-side, and compare the colors. If they
go across in the same order, it is the wrong cable.
If the go across in reverse order, it is the right
cable.

Also a bad ground, and sometimes even a broken
transmit/receive wire, can cause really strange
problems like this.

2. Wrong baud rate. Try other common speeds
(19200, 9600, 4800, 2400, 1200, 300)

3. Bad VT420. Does this terminal work on other
computers? I've seen ones with bad serial ports
before.

4. Bad console port.

...

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