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Re: misc/40641 (Serial port docs show pinout backwards)
The following reply was made to PR misc/40641; it has been noted by GNATS.
From: Ben Wong <ben%wongs.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: misc-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: misc/40641 (Serial port docs show pinout backwards)
Date: Tue, 30 May 2023 08:40:06 -0700
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Thanks, Martin! I'll accept reality over Apple's documentation any day.
=E2=80=94Ben
On Tue, May 30, 2023 at 3:15=E2=80=AFAM Martin Husemann <martin%duskware.de@localhost=
> wrote:
> The following reply was made to PR misc/40641; it has been noted by GNATS=
.
>
> From: Martin Husemann <martin%duskware.de@localhost>
> To: Ben Wong <ben%wongs.net@localhost>
> Cc: gnats-bugs%netbsd.org@localhost
> Subject: Re: misc/40641 (Serial port docs show pinout backwards)
> Date: Tue, 30 May 2023 12:10:05 +0200
>
> On Mon, May 29, 2023 at 03:37:28PM -0700, Ben Wong wrote:
>
> > Circular 8 Signal DB-9
> > 1 HSKo (+12V) 6
> > 2 HSKi 7
> > 3 TXD- 5
> > 4 GND 3,1*
> > 5 RXD- 9
> > 6 TXD+ 4
> > 7 No Wire
> > 8 RXD+ 8
> >
> > * Pins 1 and 3 on the DB-9 end are jumpered together.
> >
> > The pins on the male end of the circular 8 connector are numbered as
> shown:
> >
> > 6 7 8
> > 3 4 5
> > 1 2
>
> I just checked my working powermac G5 console cable and I can confirm
> that looking from the outside onto the pins of the male 8 pin connector
> it looks exactly like in the NetBSD documentation page:
>
> 8 7 6
> 5 4 3
> 2 1
>
> and I think the Apple shema shows the pins on the inside of the connecto=
r
> (the soldering side). I also confirmed that pin 4 of the cirular 8 pin
> jack is connected to GND at pin 5 of the DB9.
>
> Since this connector is asymetric the numbering is pretty clear (while
> the DB9 side is harder to get right, but there are typicaly numbers on
> the soldering side).
>
> The numbering for the male DB25 and DB9 connectors on the NetBSD page
> are from the same point of view, i.e. if you solder a male DB25 and have
> it lying on a desk before you with the shorter row pointing towards you,
> pin 25 is in the lower left corner, while pin 1 is on the upper right
> edge -
> but the image on the NetBSD page shows the view onto the connector when
> the cable is finished (and you can't see the soldering side).
>
> So maybe the page should get a additional hint to clarify the direction
> we are looking at the pins, but otherwise it seems to be correct to me.
>
> Martin
>
>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:garamond=
,times new roman,serif">Thanks, Martin! I'll accept reality over Apple&=
#39;s documentation any day.</div><div class=3D"gmail_default" style=3D"fon=
t-family:garamond,times new roman,serif"><br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:garamond,times new roman,serif">=E2=80=94Ben<br><=
/div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_a=
ttr">On Tue, May 30, 2023 at 3:15=E2=80=AFAM Martin Husemann <<a href=3D=
"mailto:martin%duskware.de@localhost";>martin%duskware.de@localhost</a>> wrote:<br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex">The following reply was made =
to PR misc/40641; it has been noted by GNATS.<br>
<br>
From: Martin Husemann <<a href=3D"mailto:martin%duskware.de@localhost"; target=3D"_=
blank">martin%duskware.de@localhost</a>><br>
To: Ben Wong <<a href=3D"mailto:ben%wongs.net@localhost"; target=3D"_blank">ben@won=
gs.net</a>><br>
Cc: <a href=3D"mailto:gnats-bugs%netbsd.org@localhost"; target=3D"_blank">gnats-bugs@n=
etbsd.org</a><br>
Subject: Re: misc/40641 (Serial port docs show pinout backwards)<br>
Date: Tue, 30 May 2023 12:10:05 +0200<br>
<br>
=C2=A0On Mon, May 29, 2023 at 03:37:28PM -0700, Ben Wong wrote:<br>
<br>
=C2=A0> Circular 8=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Signal=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 DB-9<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0HSK=
o (+12V)=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A06<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A02=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0HSK=
i=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 7<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A03=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0TXD=
-=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 5<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A04=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0GND=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03,1*<b=
r>
=C2=A0>=C2=A0 =C2=A0 =C2=A05=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RXD=
-=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 9<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A06=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0TXD=
+=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 4<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A07=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0No =
Wire<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A08=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RXD=
+=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 8<br>
=C2=A0> <br>
=C2=A0> * Pins 1 and 3 on the DB-9 end are jumpered together.<br>
=C2=A0> <br>
=C2=A0> The pins on the male end of the circular 8 connector are numbere=
d as shown:<br>
=C2=A0> <br>
=C2=A0>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A06 7 8<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 3 4=C2=A0 =C2=A05<br>
=C2=A0>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 1 2<br>
<br>
=C2=A0I just checked my working powermac G5 console cable and I can confirm=
<br>
=C2=A0that looking from the outside onto the pins of the male 8 pin connect=
or<br>
=C2=A0it looks exactly like in the NetBSD documentation page:<br>
<br>
=C2=A0 =C2=A0 8 7 6<br>
=C2=A0 =C2=A05=C2=A0 =C2=A04 3<br>
=C2=A0 =C2=A0 =C2=A02 1<br>
<br>
=C2=A0and I think the Apple shema shows the pins on the inside of the conne=
ctor<br>
=C2=A0(the soldering side). I also confirmed that pin 4 of the cirular 8 pi=
n<br>
=C2=A0jack is connected to GND at pin 5 of the DB9.<br>
<br>
=C2=A0Since this connector is asymetric the numbering is pretty clear (whil=
e<br>
=C2=A0the DB9 side is harder to get right, but there are typicaly numbers o=
n<br>
=C2=A0the soldering side).<br>
<br>
=C2=A0The numbering for the male DB25 and DB9 connectors on the NetBSD page=
<br>
=C2=A0are from the same point of view, i.e. if you solder a male DB25 and h=
ave<br>
=C2=A0it lying on a desk before you with the shorter row pointing towards y=
ou,<br>
=C2=A0pin 25 is in the lower left corner, while pin 1 is on the upper right=
edge -<br>
=C2=A0but the image on the NetBSD page shows the view onto the connector wh=
en<br>
=C2=A0the cable is finished (and you can't see the soldering side).<br>
<br>
=C2=A0So maybe the page should get a additional hint to clarify the directi=
on<br>
=C2=A0we are looking at the pins, but otherwise it seems to be correct to m=
e.<br>
<br>
=C2=A0Martin<br>
<br>
</blockquote></div>
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