Re: DEC MMJ -> DB9 serial ?
Have you got it figured out? I have a mmj -> rg45 cable that someone
made. It plugs into a rg45 db25. I could look to see how it is wired
if you think that would help. I also have some DEC manuals that have
various pinouts. Let me know if you need any pages scanned. Messing
with serial cables is an O(n^2) problem. Luckily n is small.
Robert Parnell writes:
> Sorry to cc: to both lists :-/
>
> Hopefully this may be informative to others who want
> to try using serial consoles + Alphas as well...
>
> --- Jean-Paul Blaquiere <japester@ucc.gu.uwa.edu.au>
> wrote:
> > > On Oct 30, Robert Parnell scratched in indelible
> > ink :
> >
> > > I have a couple DEC MMJ -> DB9F adapters which can
> > be
> > > custom configured.
> > >
> > I am presuming that this is for the vt420 end?
> > I am currently using a vt320 on my As255 and it has
> > a db25 on it. I haven't
> > seen a 420 yet so don't konw what connectors it has
> > ...
>
> Mine has two MMJs...
>
> The adapters are little boxes that have a MMJ(F) on
> one end and a DB9(F) on the other. Inside, there are
> six colored, socketed leads that may be inserted into
> the DB9 connector in any configuration.
>
> Since I've seen several conflicting pinouts for
> MMJ/DB9, this is the reason I want to get the pinouts
> correct the first time; these adapters look near
> impossible to rework, and I've only got two of them
> :-/
>
> > > 3. What /etc/inittab entry must I use to get a
> > login
> > > prompt?
> > >
> > standard entry. it's commented out in /etc/inittab
> > :)
> > just after
> > # Example how to put a getty on a serial line (for a
> > terminal)
> > T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
> >
> > remove the # from the front of the line, and then
> > kill -HUP 1 will restart
> > init. hist enter a couple of times on your vt
> > teminal and a login should
> > appear.
>
> Okay, once I get the right pinouts, I'll modify the
> inittab. I think this will be fun, somewhat nostalgic
> of my earlier VT/VAX existence though much better with
> Debian ;-)
>
> Thanks to everyone who has helped :)
>
> Rob Parnell
>
> >
> > /Jp...
> > --
> > Jean-Paul Blaquière || Avatar of
> > Computational
> > japester@ucc.gu.uwa.edu.au || Thaumaturgy
> > Words are fingers that point at the moon. Once
> > you see the moon, you no
> > longer need the fingers. -- someone,
> > somewhere
> >
> >
> > --
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--
Thanks,
George
dowdingg@math.uaa.alaska.edu
http://www.math.uaa.alaska.edu/~dowdingg
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