p40001@mcomp.UUCP (05/04/86)
I'm not sure this is still needed, but here is the trash line.
During the last few weeks I have come across numerous requests for
information about Apple's serial connectors, both on this network
and on others (BIX, Genie, etc.).
I had started compiling a list of Apple's connectors a while ago, but had not
got very far. Then the latest issue of A+ magazine arrived, and there
was all the info I needed.
The following is a list of Apple Serial Connector Pin Assignments,
as well as a chart listing the major Apple cables and how they are
configured.
If you have any questions about connecting your Apple to some peripheral
device, I encourage you to get that magazine. More info at the end of
this file.
Wolf N. Paul
{convex, texsun, infoswx}!mcomp!p40001
BIX: wnp
USPS: 290 Dogwood, Plano, TX 75075.
****************************************************************
* APPLE PIN ASSIGNMENTS *
****************************************************************
Listing the pin assignments and signal names of
Apple computer and peripheral connectors.
Pins not listed are not connected, unless otherwise noted.
A. RS-232 Interfaces
====================
SUPER SERIAL CARD -- DB25
--------------------------
1 Frame Ground
2 Transmit Data (TXD)
3 Receive Data (RXD)
4 Request to Send (RTS)
5 Clear to Send (CTS)
6 Data Set Ready (DSR)
7 Signal Ground (GND)
8 Data Carrier Detect (DCD)
19 Secondary Clear to Send (SCTS)
20 Data Terminal Ready (DTR)
APPLE //C SERIAL PORTS (both) -- DIN 5-pin
------------------------------------------
1 Data Terminal Ready (DTR)
2 Transmit Data (TXD)
3 Signal Ground (GND)
4 Receive Data (RXD)
5 Data Set Ready (DSR)
APPLE MODEM 300/1200 -- DB9
---------------------------
2 Data Set Ready (DSR)
3 Signal Ground (GND)
5 Receive Data (RXD)
6 Data Terminal Ready (DTR)
7 Data Carrier Detect (DCD)
8 Frame Ground
9 Transmit Data (TXD)
APPLE PERSONAL MODEM -- Mini-DIN 8-pin
--------------------------------------
1 Data Set Ready (DSR)
2 Data Terminal Ready (DTR)
3 Receive Data (RXD)
4 Signal Ground (GND)
5 Transmit Data (TXD)
6 Signal Ground (GND)
7 Data Carrier Detect (DCD)
LASERWRITER -- DB25
-------------------
(See RS-422 section below for LaserWriter DB-9 Connector)
1 Frame Ground
2 Transmit Data (TXD)
3 Receive Data (RXD)
4 Ready to Send (RTS)
7 Signal Ground (GND)
20 Data Terminal Ready (DTR)
IMAGEWRITER I -- DB25
---------------------
(See RS-422 section below for ImageWriter II Connector)
1 Frame Ground
2 Transmit Data (TXD)
3 Receive Data (RXD)
4 Request to Send (RTS)
7 Signal Ground (GND)
14 Fault
20 Data Terminal Ready (DTR)
APPLE SCRIBE PRINTER -- DB25
----------------------------
1 Frame Ground
2 Transmit Data (TXD)
3 Receive Data (RXD)
4 Request to Send (RTS)
7 Signal Ground (GND)
20 Data Terminal Ready (DTR)
APPLE DAISYWHEEL PRINTER -- DB25
--------------------------------
1 Frame Ground
2 Transmit Data (TXD)
3 Receive Data (RXD)
4 Request to Send (RTS)
5 Clear to Send (CTS)
6 Data Set Ready (DSR)
7 Signal Ground (GND)
8 Data Carrier Detect
20 Data Terminal Ready (DTR)
B. RS-422 INTERFACE
===================
MACINTOSH SERIAL PORTS -- DB9
-----------------------------
(Old Mac 128/512)
1 Frame Ground
2 +5V *See note below
3 Signal Ground (GND)
4 Tansmit Data (TXD+)
5 Transmit Data (TXD-)
6 +12V *See note below
7 Handshake
8 Receive Data (RXD+)
9 Receive Data (RXD-)
*Note: Apple Computer does not recommend
using these voltages to power external devices.
MACINTOSH PLUS SERIAL PORTS -- Mini DIN 8-pin
---------------------------------------------
1 Handshake Output (HSKo +12V)
2 Handshake Input (HSKi)
3 Transmit Data (TXD-)
4 Frame Ground
5 Receive Data (RXD-)
6 Transmit Data (TXD+)
8 Receive Data (RXD+
IMAGEWRITER II -- Mini DIN 8-pin
--------------------------------
1 Data Terminal Ready (DTR)
2 Data Set Ready (DSR)
3 Transmit Data (TXD-)
4 Signal Ground (GND)
5 Receive Data (RXD-)
6 Transmit Data (TXD+)
8 Receive Data (RXD+)
LASERWRITER -- DB9
------------------
(See RS-232 section above for LaserWriter DB-25 Connector)
1 Ground (GND)
3 Ground (GND)
4 Transmit Data (TXD+)
5 Transmit Data (TXD-)
8 Receive Data (RXD+)
9 Receive Data (RXD-)
C. SCSI INTERFACE
=================
MACINTOSH PLUS SCSI PORT -- DB25
--------------------------------
CAUTION: Do not confuse this connector with
a RS-232 Interface connector!!
1 Request (REQ-)
2 Message (MSG-)
3 I/O-
4 Reset (RST-)
5 Acknowledge (ACK-)
6 Busy (BSY-)
7 Ground (GND)
8 Data Line 0 (DB0-)
9 Ground (GND)
10 Data Line 3 (DB3-)
11 Data Line 5 (DB5-)
12 Data Line 6 (DB6-)
13 Data Line 7 (DB7-)
14 Ground (GND)
15 Carrier Detect (C/D-)
16 Ground (GND)
17 Attention (ATN-)
18 Ground (GND)
19 Select (SEL-)
20 Parity (DBP-)
21 Data Line 1 (DB1-)
22 Data Line 2 (DB2-)
23 Data Line 4 (DB4-)
24 Ground (GND)
Note: The SCSI port uses -5V logic levels;
the minus sign in the signal names indicates
negative signal voltage levels.
****************************************************************
* APPLE CABLE GUIDE *
****************************************************************
ABBREVIATIONS:
SSC = Super Serial Card; 2CS = //c Serial Ports;
IWR = Image Writer I; IWR2 = Image Writer II;
LWR = Laser Writer; DWP = Apple Daisywheel Printer
MDM = Modem 300/1200; PMDM = Personal Modem;
MAC = Macintosh 128/512; MAC+ = Macintosh Plus
In the following cable descriptions, which are identified as
"Device 1 => Device 2", each group of two numbers indicates a pin on Device 1
and a pin on Device 2 which need to be connected.
I.e., in "SSC => IWR", the notation "1-1" means "connect pin 1 on the SSC
to pin 1 on the IWR".
A. APPLE ][, ][+, //e CABLES
----------------------------
1. SSC => IWR (Apple Cable # 590-0037) (See note 1)
(DB25 => DB25)
1-1, 13-13, 19-19, 23-23.
2. SSC => IWR2 (Apple Cable # 590-0335) (See note 1)
(DB25 => Mini DIN 8-pin)
1-20, 2-8, 3-2, 4-7, 5-3, 8-7.
Jumper pins 8 & 6 on DB-25 connector.
3. SSC => LWR (no Apple cable available) (See notes 1, 2)
(DB25 => DB25)
1-1, 2-2, 3-3, 7-7.
4. SSC => DWP Identical to #1, SSC => IWR
5. SSC => MDM (Apple Cable # 590-0212) (See note 3)
(DB25 => DB9)
6-2, 7-3, 3-5, 20-6, 8-7, 1-8, 2-9.
Jumper pins 8 & 5 on DB-25 connector.
6. SSC => PMDM (Apple Cable # 590-0331) (See note 3)
(DB25 => Mini DIN 8-pin)
8-1, 20-2, 3-3, 7-4, 2-5, 7-8.
Jumper pins 8 & 6 on DB-25 connector.
7. SSC => MAC (Apple Cable # 590-0169) (See note 3)
(DB25 => DB9)
1-1, 3-7, 5-3, 7-20, 9-2.
B. APPLE //c CABLES
-------------------
8. A2C => IWR (Apple Cable # 590-0191)
(DIN 5-pin => DB25)
1-6, 2-3, 3-7, 4-2, 5-20.
9. A2C => IWR2 (Apple Cable # 590-0333)
(DIN 5-pin => Mini DIN 8-pin)
1-1, 5-2, 2-3, 3-4, 4-5, 3-8.
10. A2C => DWP (Identical to #8, A2C => IWR)
11. A2C => MDM (Apple Cable # 590-0192)
(DIN 5-pin => DB9)
1-6, 2-9, 3-3, 4-5, 5-2.
Jumper pins 3 & 8 on DB-9 connector.
12. A2C => PMDM (Identical to #9, A2C => IWR2)
C. MACINTOSH CABLES
-------------------
13. MAC => IWR (Apple Cable # 590-0169)
(DB9 => DB25)
1-1, 3-7, 5-3, 7-20, 9-2.
14. MAC => IWR2 (Apple Cable # 590-0332)
(DB9 => Mini DIN 8-pin)
1-7, 2-6, 3-9, 4-1, 5-5, 6-8, 7-7, 8-4.
15. MAC => MDM (Apple Cable # 590-0197)
(DB9 => DB9)
3-3, 5-9, 6-6, 7-7, 8-8, 9-5.
Jumper pins 3 & 8 on both ends.
16. MAC => PMDM (Identical to # 14, MAC => IWR2)
17. MAC => Generic Modem (No Apple Cable available)
(DB-9 => DB25)
1-1, 3-7, 5-2, 7-20, 9-3.
Jumper pins 3 & 8 on DB-9 connector.
D. MACINTOSH PLUS CABLES
------------------------
18. MAC+ => IWR (No Apple Cable available)
(Mini DIN 8-pin => DB25)
2-20, 3-3, 4-1, 5-2, 8-7.
19. MAC+ => IWR2 (Apple Cable # 590-0340)
(Mini DIN 8-pin => Mini DIN 8-pin)
1-2, 2-1, 3-5, 4-4, 5-3, 6-8, 7-7, 8-6.
20. MAC+ => MDM (No Apple Cable available)
(Mini DIN 8-pin => DB9)
1-6, 2-7, 3-9, 4-3&8, 5-5, 8-7.
21. MAC+ => PMDM (Identical to # 19, MAC+ => IWR2)
22. MAC+ => Generic Modem (No Apple Cable available)
(Mini DIN 8-pin => DB25
1-20, 4-7, 3-2, 2-5, 5-3.
E. SPECIAL
----------
23. DB25 => DB25 Modem Eliminator Cable (Apple Cable # 590-0166)
1-1, 2-3, 3-2, 4&5-8, 6-20, 7-7, 8-4&5, 20-6.
24. Mini DIN 8-pin => DB-9 Adapter (Apple Cable # 590-0341)
1-6, 2-7, 3-5, 4-3, 5-9, 6-4, 8-8.
Jumper pins 1 & 3 on DB-9 connector.
NOTES:
------
1. The SSC must be in PRINTER mode: triangle on jumper block pointing towards
TERMINAL, SW1-5 off, SW1-6 on.
2. Requires Xon/Xoff handshaking. SSC SW1-4,6,7 on; SW2-1,4 on.
3. The SSC must be in COMMUNICATIONS mode: triangle on jumper block pointing
towards MODEM, SW1-5,6 on.
****************************************************************
* CONNECTOR PIN NUMBERS *
****************************************************************
The numbers shown are for male connectors, and are reversed (left to right)
for female connectors.
A. DB-25
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
B. DB-9
1 2 3 4 5
6 7 8 9
C. DIN 5-pin
*
1 5
2 4
3
( * indicates the notch)
D. Mini DIN 8-pin
*
6 7 8
3 4 5
* 1 2 *
(* indicates the notches in the connector)
WARNING: The above information is provided for your reference only, and no
responsibility is assumed for its accuracy. You are encouraged to verify the
Cable Listings by means of the Pin Assignment listings.
SOURCE and further REFERENCE:
This listing was inspired and greatly facilitated by an article in the
June 1986 A+ magazine: The Right Connections, by Brian Cutter. You are
encouraged to refer to the magazine article for a lot of helpful hints and
additional information on connecting Apple Computers and peripherals.
Most of the information included was obtained from AppleLink, Apple Computer's
on-line service for dealers.
Further Information can be found in the following books:
Kim G. House & Jeff Marble, THE PRINTER CONNECTIONS BIBLE.
(Howard E. Sams & Co. Inc., 4300 W. 62nd St., Indianapolis, IN 46268)
Carolyn Curtis & Daniel L. Majhor, THE MODEM CONNECTIONS BIBLE.
(Howard E. Sams & Co. Inc., 4300 W. 62nd St., Indianapolis, IN 46268)
MICRO MATCH
(Command Computer Corporation, 36 Columbia Terrace, Weehawken, NJ 07087)
THE APPLE INTERFACE MANUAL
(Apple Computer, Inc., 20525 Mariani Avenue, Cupertino, CA 95014)hobson@caip.RUTGERS.EDU (Kevin Hobson) (05/14/86)
First, If you try some of these connections WATCH OUT. > information about Apple's serial connectors, both on this network > and on others (BIX, Genie, etc.). > I had started compiling a list of Apple's connectors a while ago, but had not > got very far. Then the latest issue of A+ magazine arrived, and there > was all the info I needed. Don't always believe what you read. The pins connection on the Apple products are correct. Making the connections are a whole different story. > > A. APPLE ][, ][+, //e CABLES > ---------------------------- > > 1. SSC => IWR (Apple Cable # 590-0037) (See note 1) > (DB25 => DB25) > 1-1, 13-13, 19-19, 23-23. Do you plan on sending data or what? You need pins 2 and 3 (transmit and receive) Also the super serial only has 1-8, and 20 (it might have one more). Pins 13,19, and 23 are non-existent > 4. SSC => DWP Identical to #1, SSC => IWR Ahem > E. SPECIAL > ---------- > > 23. DB25 => DB25 Modem Eliminator Cable (Apple Cable # 590-0166) > 1-1, 2-3, 3-2, 4&5-8, 6-20, 7-7, 8-4&5, 20-6. There is no such thing as true modem eliminator (This cable also works between Ibm serial and a Imagewriter I. You need to make a different cable for Lisa to Imagewriter I (I have the specific, I will post them later if someone wants them) > > WARNING: The above information is provided for your reference only, and no > responsibility is assumed for its accuracy. You are encouraged to verify the > Cable Listings by means of the Pin Assignment listings. > > SOURCE and further REFERENCE: > > This listing was inspired and greatly facilitated by an article in the > June 1986 A+ magazine: The Right Connections, by Brian Cutter. You are > encouraged to refer to the magazine article for a lot of helpful hints and > additional information on connecting Apple Computers and peripherals. > > Most of the information included was obtained from AppleLink, Apple Computer > on-line service for dealers. > > Further Information can be found in the following books: > > Kim G. House & Jeff Marble, THE PRINTER CONNECTIONS BIBLE. > (Howard E. Sams & Co. Inc., 4300 W. 62nd St., Indianapolis, IN 46268) > > Carolyn Curtis & Daniel L. Majhor, THE MODEM CONNECTIONS BIBLE. > (Howard E. Sams & Co. Inc., 4300 W. 62nd St., Indianapolis, IN 46268) > > MICRO MATCH > (Command Computer Corporation, 36 Columbia Terrace, Weehawken, NJ 07087) > > THE APPLE INTERFACE MANUAL > (Apple Computer, Inc., 20525 Mariani Avenue, Cupertino, CA 95014) Since I have wrote this at a busy moment I will have to follow up later with some accurate information. You can read as books as you want, but you will learn to love a breakout box when you make connections between serial interface computers [make DB25 end to DB25 (DIN-8, DB9, DB50, whatever) with transmit going to transmit, receive going to receive and so on (basically a straight thru)] and have fun finding the right connection between computer-breakout box-whatever. -- ----------------------------------------------------------------- - ARPA: Hobson@rutgers - - UUCP: (ihnp4!ut-sally, seismo, allegra!packard) !topaz!hobson - -----------------------------------------------------------------