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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, netbsd-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
andvar%netbsd.org@localhost
Subject: Re: misc/40641 (Serial port docs show pinout backwards)
Date: Mon, 29 May 2023 15:37:28 -0700
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It has been a long time since I opened this bug, but I am pretty sure that
I opened this bug because the cable I made from the NetBSD docs was
incorrect.
Apple moved their web page. Please refer instead to
https://support.apple.com/kb/TA27966. Here is what it says:
Macintosh: Mini DIN-8 to DB-9 Adapter Pinouts (10/94)
This adapter cable is used to connect DB-9 cables to devices with Mini
DIN-8 ports (such as on the Macintosh Plus or newer).
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
NOTE: The Macintosh Plus peripheral adapter cable is stamped with the
number 590-0341; when reordering, however, be sure to use the cable's
service part number, which is 699-0430 (older cables may be referred
to as 699-0372).
Article Change History:
12 Oct 1994 - Reviewed for technical accuracy.
Support Information Services
Note that this pin numbering matches what one would expect for DIN-8
male so is unlikely to be backwards.
--Ben
On Sun, May 28, 2023 at 11:56=E2=80=AFAM <andvar%netbsd.org@localhost> wrote:
> Synopsis: Serial port docs show pinout backwards
>
> State-Changed-From-To: open->closed
> State-Changed-By: andvar%NetBSD.org@localhost
> State-Changed-When: Sun, 28 May 2023 18:56:47 +0000
> State-Changed-Why:
> www pinout seems to be correct, though internet resources are a bit
> confusing.
> support page from the PR is not available anymore, but
> http://info.ee.surrey.ac.uk/Workshop/advice/conns/connSerial.html#Mac
> mentions
> that some apple docs could have had reversed pinout.
> closing without changes for now.
>
>
>
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<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:garamond,times new roman,serif">It has been a long time since I op=
ened this bug, but I am pretty sure that I opened this bug because the cabl=
e I made from the NetBSD docs was incorrect. <br></div><div class=3D"gmail_=
default" style=3D"font-family:garamond,times new roman,serif"><br></div><di=
v class=3D"gmail_default" style=3D"font-family:garamond,times new roman,ser=
if">Apple moved their web page. Please refer instead to <a href=3D"https://=
support.apple.com/kb/TA27966">https://support.apple.com/kb/TA27966</a>. Her=
e is what it says:</div><div class=3D"gmail_default" style=3D"font-family:g=
aramond,times new roman,serif"><br></div><div class=3D"gmail_default" style=
=3D"font-family:garamond,times new roman,serif"><pre id=3D"gmail-line1"><sp=
an>Macintosh: Mini DIN-8 to DB-9 Adapter Pinouts (10/94)<br><br>This adapte=
r cable is used to connect DB-9 cables to devices with Mini<br>DIN-8 ports =
(such as on the Macintosh Plus or newer).<br>=C2=A0 =C2=A0 =C2=A0 <br>Circu=
lar 8 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Signal =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
=C2=A0DB-9<br>=C2=A0 =C2=A0 1 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 HSKo (+12=
V) =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 6<br>=C2=A0 =C2=A0 2 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 HSKi =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A07<br>=C2=A0 =C2=A0 3 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TXD- =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A05<br>=C2=A0 =
=C2=A0 4 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 GND =C2=A0 =C2=A0 =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 3,1*<br>=C2=A0 =C2=A0 5 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 RXD- =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A09<br>=C2=A0 =C2=A0 6 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TXD+ =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04<br>=C2=A0 =
=C2=A0 7 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 No Wire<br>=C2=A0 =C2=A0 8 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RXD+ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A08<br>=C2=A0<br>* Pins 1 and 3 on the DB-9 end are j=
umpered together.<br>=C2=A0<br>The pins on the male end of the circular 8 c=
onnector are numbered as shown:<br>=C2=A0<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 6 7 8<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03 4 =C2=A0 5<br>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01 2<br>=C2=A0<br>NOTE: The Macintosh Plus=
peripheral adapter cable is stamped with the<br>=C2=A0 =C2=A0 =C2=A0 numbe=
r 590-0341; when reordering, however, be sure to use the cable's<br>=C2=
=A0 =C2=A0 =C2=A0 service part number, which is 699-0430 (older cables may =
be referred<br>=C2=A0 =C2=A0 =C2=A0 to as 699-0372).<br><br>Article Change =
History:<br>12 Oct 1994 - Reviewed for technical accuracy. <br><br>Support =
Information Services<br><br></span></pre><pre id=3D"gmail-line1"><span><fon=
t face=3D"garamond,times new roman,serif">Note that this pin numbering matc=
hes what one would expect for DIN-8 male so is unlikely to be backwards.<br=
><br></font></span></pre><pre id=3D"gmail-line1"><span><font face=3D"garamo=
nd,times new roman,serif">--Ben<br></font></span></pre></div></div><br><div=
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, May 28=
, 2023 at 11:56=E2=80=AFAM <<a href=3D"mailto:andvar%netbsd.org@localhost";>andvar@=
netbsd.org</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">Synopsis: Serial port docs show pinout backwards<br>
<br>
State-Changed-From-To: open->closed<br>
State-Changed-By: andvar%NetBSD.org@localhost<br>
State-Changed-When: Sun, 28 May 2023 18:56:47 +0000<br>
State-Changed-Why:<br>
www pinout seems to be correct, though internet resources are a bit confusi=
ng.<br>
support page from the PR is not available anymore, but<br>
<a href=3D"http://info.ee.surrey.ac.uk/Workshop/advice/conns/connSerial.htm=
l#Mac" rel=3D"noreferrer" target=3D"_blank">http://info.ee.surrey.ac.uk/Wor=
kshop/advice/conns/connSerial.html#Mac</a> mentions<br>
that some apple docs could have had reversed pinout.<br>
closing without changes for now.<br>
<br>
<br>
</blockquote></div></div>
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