This page was copied from Tommy's pinout collection
Please email me any pinouts you have.


The comp.sys.ibm.pc.hardware.* FAQ, which can be found on rtfm.mit.edu, supplied the majority of these pinouts. The rest are from people who emailed pinouts to me. I failed to keep track of who to give credit to though (Sorry about that...) 

Contents:

Communications interfaces 
Console interfaces (keyboard, mouse, etc.) 
Internal interfaces (eg: bus slots) 
Video connectors 
Disk interfaces 
Various analog connectors 
Connector diagrams 

Communications: 
9 pin rs-232
Connector: D9
1 CD carrier detect
2 RD receive data
3 TD transmit data
4 DTR data terminal ready
5 GND
6 DSR data set ready
7 RTS request to send
8 CTS clear to send
9 RI ring indicator

25 pin rs-232
Connector: D25
1 PG protective ground
2 TD transmit data
3 RD receive data
4 RTS request to send
5 CTS clear to send
6 DSR data set ready
8 CD carrier detect
7 GND signal ground
20 DTR data terminal ready
22 RI ring indicator

DEC's Dual RS-232
(found on the "Multia" or "UDB", puts two ports on one connector)
Connector: D25

Port 1:
2 TD
3 RD
4 RTS
5 CTS
6 DSR
7 GND
8 DCD
20 DTR
22 RI

Port 2:
11 DTR
12 DCD
13 CTS
14 TD
16 RD
19 RTS
23 DSR
25 RI

Sun dual RS-232
(found on Sparcstation, SLC, ELC, etc.)
Connector: D25
port 1:
2 TD
3 RD
4 RTS
5 CTS
6 DSR
7 GND (shared between both ports)
8 DCD
15 TD clock in?
17 RD clock in
20 DTR
24 TD clock out

port 2: (not all signals are present)
12 DCD
13 CTS
14 TD
16 RD
19 RTS

a SLC/ELS has the additional connections:
11 port 2 DTR
18 port 2 TD clock in
25 port 2 TD clock out

Console on a DEC VAXstation 3100 or DECstation 3100:
Connector: mmj

Corresponding 25 pin RS-232 pins
1 DTR 20
2 TD (+) 2
3 TD (-) 7
4 RD (-) 7
5 RD (+) 3
6 DSR 6

This isn't RS-232, its a differential interface (hence the + and - pins) 
(RS-422?).

TTL port on a MFJ 1270C/1276 TNC2 packet radio TNC
Connector: 10 pin single row header (1 is closest to RS-232)
1 RD
2 DCD
3 GND
4 RTS
5 TD
6 DSR
7 CTS

Mapping to Comodore Vic-20, 64 or, 128 user port:
1 B,C
2 H
3 N
4 E
5 M
6 L
7 K

mac serial port:
(printer end)
Connector: mini-circular-square-din-type connector

U
8 7 6
5 4 3
2 1

1 handshake out (DTR?)
2 handshake in (RTS?)
3 TD-
4 GND
5 RD-
6 TD+
7 GPinput (NC on Mac plus and earlier)
8 RD+

This is an RS-422 interface not RS-232, hence the paired IO pins (+ and -).
To connect to an RS-232 device: attach the - pins to the RS-232 data 
pins, and RD+ to ground. The handshake in and out are the hardware flow
control, GPinput is carrier detect.

Cyclades Corp 8 port serial board
Connector: RJ-12 (like an RJ45 but 6 pins)
Model 8Ys
New Card (version 4.x and later)
1 DTR
2 TD
3 GND
4 CTS
5 RD
6 DCD

Old Card (prior to version 4.x)
1 TD
2 RD
3 DTR
4 CTS
5 GND
6 DCD

Model 8Yo, 8Zo DB-25 Octopus cable uses the standard RS-232 DB-25 pinout.

10 pin RJ-45-like connector:
1 protective GND
2 RTS
3 DTR
4 TD
5 GND
6 CTS
7 RD
8 DCD
9 DSR
10 RI

Toshiba PBX Preception 2 Telephone Switch
Connector: DB-25
(pretty much a standard RS-232)
1 NC
2 TD
3 RD
4 RTS
5 CTS
6 DSR
7 Signal GND
8 NC
20 NC
22 NC

IBM-compatable parallel printer port, 25 pin version:
Connector: D25
1 -strobe
2-9 D0-7
10 -Ack
11 Busy
12 PE
13 Select
14 -Auto Feed XT
15 -Error
16 -Init
17 -Select in
18-25 GND (mostly shielding)

AUI socket for ethernet:
Connector:D15

1 ?
2 Collision +
3 TD+
4 RD shield
5 RD+
6 GND
7 VCC (?)
9 Collision -
10 TD-
11 TD shield
12 RD-
13 +12VDC
14 +12VDC ground
15 ?

ten base T ethernet:
Connector:rj45
1. tx+
2. tx-
3. rx+
6. rx-

for a crossover cable:
tx+ to rx+
tx- to rx-
rx+ to tx+
rx- to tx-


Signal connector on Minuteman UPS's:
Connector:D9
1. Unused
2. Battery power
3. Unused
4. Common (same as 7)
5. Low battery
6. rs-232 level shutdown
7. Common (same as 4)
8. Ground level shutdown (A500 and above, reserved on < A500)
9. Reserved

Pins 2 and 5 are connected to Common when they are true.
On pin 6, an rs-232 high level (>9V) will shutdown, when running off the
battery.
On pin 8, shorting to ground will shutdown.

Signal connector on a Triplitte OmniPro 675 UPS:
Connector: unknown (the donator didn't say...)
1. Common/Negative
2. External inverter shutdown, positive side
3. line fail, normaly open contact
4. return/external inverter shutdown negative side
5. line fail, normaly closed contact
6. low battery, positive side (2 minute warning)

MIDI out or through
Connector: 5 pin DIN
1. Reserved
2. Ground (shield of twisted pair)
3. Reserved
4. +5v
5. Data (pins 4 and 5 in twisted pair)

MIDI in
Connector: 5 pin DIN
1. Reserved
2. Ground (shield of twisted pair)
3. Reserved
4. RD+
5. RD- (pins 4 and 5 in twisted pair)

(I am fairly sure this is correct)

Serial port on a Kawai X series or Yamaha TG, CB, or MU series synthesizer
Connector: 8 pin micro DIN (like a PS2 keyboard?)
1. CTS clear to send
2. RTS request to send
3. RD receive data
4. GND
5. TD transmit data
6. not connected
7. not connected
8. not connected

RS-422
Connector: DB-9
1 Sig Gnd
2 RTS+
3 RTS-
4 TXD+
5 TXD-
6 CTS-
7 CTS+
8 RXD+
9 RXD-

EIA RS-485
RS-485 resembles RS-422 except that associated drivers are tri-state, not
dual state. It may be used in multipoint applications where one computer
controls many different devices. Up to 64 devices may be interconnected
with RS-485

EIA RS-449
1 Shield 20 Receive Gommon
2 Signaling Rate Indicator 21
4 Send Data 22 Send Data
S SendTiming 23 Send Timing
6 Receive Data 24 Receive Data
7 Request to Send 25 Request to Send
8 Receive Timing 26 Receive Timinq
9 Clear to Send 27 Clear to Send
10 Local loopback 28 Terminal in Service
11 Data Mode 29 Data Mode
12 Temminal Ready 30 Terminal Ready
13 Receiver Ready 31 Receiver Reader
14 Remote loopback 32 SeleetStandby
15 Intoming Call 33 SignalQuality
16 Select Frequency 34 New Signal
17 Terminal Timing 35 Terminal Timing
18 Test Mode 36 Standby/Indicator
19 Signal Ground 37 Send Common

RS-449 defines functional/mechanical interfaces for DTEs/DCEs that employ
serial binary data interchange, and is usually used with synchronous
transmissions. It identifies signals (TD, RD, etc.) that correspond with
the pin numbers for a balanced interface on OB37 and DB9 connectors. RS 449
was originally intended to replace RS-232G, but RS-232 and RS-449 are
completely incompatible in mechanical and electrical specifications.

EIA RS-530
1 Shield(A)
2 Transmitted Data(A)
3 Received Data (A)
4 Request to Send (A)
5 Clear to Send (A)
6 DCE Ready (A)
7 Signal Ground
8 Received line Signal Detector (A)
9 Receiver Signal Element Timing - DCE (B)
10 Received line Signal Detector (B)
11 Transmitter Signal Element Timin DTE (B)
12 Transmitter Signal Element Timing DCE (B)
13 Cear to Send (B)
14 Transmitted Dota (B)
15 Transmitted Signal Element DCE (A)
16 Received Data (B)
17 Receiver Signal Element Timing DLE (A)
18 Local Loopback
19 Request to Send
20 DTE Ready (A)
21 Remote loopbork
22 DCE Ready (B)
23 DTE Ready (B)
24 Tronsmitter Signal Element Timing DTE (A)
25 Test Mode

RS-530 supersedes RS-449 and complements RS-232. Based on a 25 pin
connection, it works in conjunction with either electrical interface RS-422
(balanced electrical circuits) or RS-423 (unbalanced electrical circuits).
RS-530 defines the mechanical/electrical interfaces between DTEs and DCEs
that transmit serial binary data, whether synchronous or asynchronous.
RS-530 provides a means for taking advantage of higher data rates with the
same mechanical connector used for RS-232. However, RS-530 and RS-232 are
not compatible!

RS-530 accommodates data transmission rates from 20 Kbps to 2 Mbps; maximum
distance depends on which electrical interface is used. RS-530 is
compatible with these standards: ITU V.10, V.11, X26; MIL-188/114; RS-449.


Console devices: 

(Keyboard, mouse, joystick, etc.) 
ps2 keyboard connector
Connector:PS2
1 data
2 reserved
3 GND
4 +5V
5 clock
6 reserved
Also used for PS2 mice, they are interchangable except for the data format.

ps2 keyboard Y adapter for Gateways:
male keyboard mouse
1 2 -
2 - 2
3 3 3
4 4 4
5 6 -
6 - 6

ps2 keyboard Y adapter for Thinkpads:
male kbd mouse
1 2 -
2 - 1,2
3 3 3
4 4 4
5 6 5
6 - 6

PC/XT keyboard connector 
Connector: 5 pin DIN
1 clock
2 data
3 reset
4 GND
5 +5V

AT keyboard connector 
Connector: 5 pin DIN
1 clock
2 data
3 NC
4 GND
5 +5V

AT&T 6300 keyboard connector 
Connector:D9
1 data
2 clock
3 gnd
4 gnd
5 +12V
6-9 nothing

Sun type 3 keyboard connector
Connector: D15
1 keyboard RD
2 GND
3 keyboard TD
4 GND
5 mouse RD
6 GND
7 mouse TD
8 GND
9 GND
10-15 VCC +5VDC

Sun type 4 keyboard connector
Connector: Mini-DIN
1 GND
2 GND
3 VCC +5VDC
4 mouse RD
5 keyboard TD
6 keyboard RD
7 mouse TD
8 VCC +5VDC

type 3 and type 4 keyboards are compatible,
all it takes is a connector adapter.

Joystick connector
Connector: D15
1 +5V
2 Button 1
3 Position 0 (X coord)
4 GND
5 GND
6 Position 1 (Y coord)
7 Button 2
8 +5V

9 +5V
10 Button 3
11 Position 2 (X coord)
12 GND
13 Position 3 (Y coord)
14 Button 4
15 +5V

on a Gravis ultrasound board:
12 transmit MIDI
13 receive MIDI
It requires line drivers

SGI mouse interface (model 021-0004-002)
Connector:D9
1. +5V
2. -5V
5. MTXD (data)
9. GND


Internal interfaces
ISA slot:
[rear panel on this end, looking down into the edge connector]

GND -IO CH CK
Reset DRV D7
+5V D6
IRQ 2 D5
-5V D4
DRQ 2 D3
-12V D2
Reserved D1
+12V D0
GND I/O CH RDY
-MEMW AEN
-MEMR A19
-IOW A18
-IOR A17
-DACK 3 A16
DRQ 3 A15
-DACK 1 A14
DRQ 1 A13
-MREF A12
CLK A11
IRQ 7 A10
IRQ 6 A9
IRQ 5 A8
IRQ 4 A7
IRQ 3 A6
-DACK 2 A5
TC A4
ALE A3
+5V A2
OSC A1
GND A0

--- Gap between 8 and 16 bit parts here ----

-MEM CS16 SBHE
-IO CS 16 A23
IRQ 10 A22
IRQ 11 A21
IRQ 12 A20
IRQ 13 A19
IRQ 14 A18
-DACK 0 A17
DRQ 0 -MEMR
-DACK 5 -MEMW
DRQ 5 D8
-DACK 6 D9
DRQ 6 D10
-DACK 7 D11
DRQ 7 D12
+5V D13
-Master D14
GND D15

30 pin Fast Page Mode SIMM:
Connector: 30 pin SIMM
256kx8 256kx9 1Mx8 1Mx9 4Mx8 4Mx9
pin assignment|pin assignment|pin assignment|pin assignment
1 Vcc |9 Gnd |17 A8 |25 DQ7
2 -CAS |10 DQ2 |18 A9 |26 QP
3 DQ0 |11 A4 |19 A10 |27 -RAS
4 A0 |12 A5 |20 DQ5 |28 -CASP
5 A1 |13 DQ3 |21 -WE |29 DP
6 DQ1 |14 A6 |22 Gnd |30 Vcc
7 A2 |15 A7 |23 DQ6
8 A3 |16 DQ4 |24 N/C 

Notes:
QP, CASP and DP are N/C on all x8 bit modules
a9 is a N/C on 256k modules
a10 is a N/C on 256k and 1M modules

72 pin Fast Page Mode SIMM:
Connector: 72 pin SIMM
256k/512k/1M/2M/4M/8M x 32/36 bit
pin assignment|pin assignment|pin assignment|pin assignment
1 Gnd |19 A10 |37 MP1 |55 DQ11
2 DQ0 |20 DQ4 |38 MP3 |56 DQ27
3 DQ16 |21 DQ20 |39 Gnd |57 DQ12
4 DQ1 |22 DQ5 |40 -CAS0 |58 DQ28
5 DQ17 |23 DQ21 |41 -CAS2 |59 Vcc
6 DQ2 |24 DQ6 |42 -CAS3 |60 DQ29
7 DQ18 |25 DQ22 |43 -CAS1 |61 DQ13
8 DQ3 |26 DQ7 |44 -RAS0 |62 DQ30
9 DQ19 |27 DQ23 |45 -RAS1 |63 DQ14
10 Vcc |28 A7 |46 N/C |64 DQ31
11 N/C |29 N/C |47 -WE |65 DQ15
12 A0 |30 Vcc |48 N/C |66 N/C
13 A1 |31 A8 |49 DQ8 |67 PD1
14 A2 |32 A9 |50 DQ24 |68 PD2
15 A3 |33 -RAS3 |51 DQ9 |69 PD3
16 A4 |34 -RAS2 |52 DQ25 |70 PD4
17 A5 |35 MP2 |53 DQ10 |71 N/C
18 A6 |36 MP0 |54 DQ26 |72 Gnd

Notes:
MP0,MP1,MP2,MP3 are N/C on all x32 bit modules
a9 is a N/C on 256k and 512k modules
a10 is a N/C on 256k, 512k, 1M and 4M modules
^^--- This may be 2M, not 4M
RAS1/RAS3 are N/C on 256k, 1M and 4M modules


Video:
monitor-sync.ps- schematic of a seperate sync to composite sync on green adapter. I have built a device similar to this one for an IBM 8051 display on a Sun 3/60. It worked for me, but your milage may vary. 

VGA video:
Connector:high density D15
1. red
2. green
3. blue
4. reserved
5. reserved
6. red return
7. green return
8. blue return
9. key (no pin)
10. GND
11. monitor sense 0
12. monitor sense 1
13. horizontal sync
14. vertical sync
15. reserved

VESA Standard Feature Connector
Connector:26 pin header
pin assignment pin assignment
1 PB 2 PG
3 PR 4 PI
5 SB 6 SG
7 SR 8 SI
9 Dot Clock 10 Blank
11 HSync 12 VSync
13 GND 14 GND
15 GND 16 GND
17 Ext Video Sel 18 Ext Sync Sel
19 Ext DotClock Sel20 N/C
21 GND 22 GND
23 GND 24 GND
25 N/C 26 N/C

CGA video:
Connector:D9
1. GND
2. GND
3. red
4. green
5. blue
6. intensity
7. reserved
8. horizontal sync
9. vertical sync

MDA video:
Connector:D9
1. GND
2. GND
3. NC
4. NC
5. NC
6. intensity
7. video
8. horizontal sync
9. vertical sync

NEC multisync monitors:
Connector:D9
1. red
2. green
3. blue
4. horizontal sync
5. vertical sync
6. red ground
7. green ground
8. blue ground
9. sync ground

3b1/7300 video:
Connector:12 pin header
1. vertical sync
2. GND
3. horizontal sync
4. GND
5. video
6. GND
7. +12 volts
8. GND
9. +12 volts
10. speaker
11. speaker

AT&T PC6300
Connector: D25
1. horizontal sync
2. ID0 (monitor id)
3. vertical sync
4. red
5. green
6. blue
8. nothing
9. nothing
10. ID1
11. Mode0
12. nothing
13. -Degauss
14-21. gnd
22. nothing
23. nothing
24,25. +15V
for a monochrome monitor ID0 and ID1 are open
for color, ID0 is 0, and ID1 is 1, probably 5V, not 15

AT&T 53D410
Connector: D25

2. vertical sync
3. horizontal sync
5. video
13-15. gnd

AT&T 6300 Taxan monitor
Connector: 8 pin Din

1. Special TEXT signal (no explanation as to what that means)
2. Red video signal
3. Green video signal
4. Blue video signal
5. Intensity signal
6. Signal ground
7. Horizontal or Composite sync.
8. Vertical sync.

Macintosh
Connector:D15
1. GND for red
2. red
3. composite sync
4. Monitor sense 0
5. green
6. GND for green
7. Monitor sense 1
8. no connection
9. blue
10. Monitor sense 2
11. Sync GND
12. Vertical sync
13. GND for blue
14. Horizontal sync GND
15. Horizontal sync

Sun
"13W3" is an unusual connector combining a
10-pin D-shell and analog three video conductors:

gray/ 1 gnd*
red * * green blue 2 vertical sync*
| 1o 2o 3o 4o 5o | | 3 sense #2
(O) (O) (O) 4 sense gnd
6o 7o 8o 9o 10o 5 composite sync
* * 6 horizontal sync*
7 gnd*
* Considered obsolete, may not be 8 sense #1
connected. 9 sense #0
10 composite gnd

The codes for the three monitor-sense bits are:

0 ??? 4 1152 x 900 76Hz 19"
1 reserved 5 reserved
2 1280 x 1024 76Hz 6 1152 x 900 76Hz 16-17"
3 1152 x 900 66Hz 7 no monitor connected

See http://cvs.anu.edu.au:80/monitorconversion/ and
http://rugmd0.chem.rug.nl/~everdij/hitachi.html for info on attaching old workstation monitors 
to VGA boards.

Sun DB-9 video:
Connector: D9
1 Video+
3 Hsync
4 Vsync
6 Video-
7 GND
8 GND
9 GND

Video is ECL levels, sync signals are TTL.

Atart 1040ST video:
Connector: 13 pin DIN
Computer is female, display is male.

1 AO Audio Out
2 CVIDEO Composite Video
3 CS Clock Select
4 MD Monochrome Detect / Clock In
5 AI Audio In
6 G Green
7 R Red
8 +12VDC (520ST has GND here)
9 HSYNC Horizontal Sync
10 B Blue
11 MVIDEO Monochrome video
12 VSYNC Vertical Sync
13 GND Ground

I don't know what the R,G,B levels are. Probably digital...


Disk interfaces:
MFM floppy connector
Connector: 34 pin edge connector
pin 1 pin 2
GND -High density select
reserved reserved
GND reserved
GND -Index
GND -Motor enable 1
GND -Drive select 0
GND -Drive select 1
GND -Motor enable 0
GND -Direction
GND -Step
GND -Write data
GND -Write enable
GND -Track 0
GND -Write protect
GND -Read data
GND -Head 1 select
GND -Disk change
pin 33 pin 34

IDE drive connector
Connector: 40 pin header
IDE Hard Disk Interface IDC-40 Male
pin assignment pin assignment
1 -Reset 2 GND
3 Data 7 4 Data 8
5 Data 6 6 Data 9
7 Data 5 8 Data 10
9 Data 4 10 Data 11
11 Data 3 12 Data 12
13 Data 2 14 Data 13
15 Data 1 16 Data 14
17 Data 0 18 Data 15
19 GND 20 Key
21 (reserved) 22 GND
23 -IOW 24 GND
25 -IOR 26 GND
27 IO Chrdy 28 Ale
29 (reserved) 30 GND
31 IRQ14 32 -IOCS16
33 Addr 1 34 (reserved)
35 Addr 0 36 Addr 2
37 -CS0 (1F0-1F7) 38 -CS1 (3f6-3f7)
39 -Active 40 GND 

Portables use a 44 pin IDE connector, which is the same as above plus:
41 +5V (logic)
42 +5V (motor)
43 GND
44 reserved


ESDI Hard Disk Interface
Command cable 
Connector:34 pin header
pin assignment pin assignment
1 GND 2 Head Sel 3
3 GND 4 Head Sel 2
5 GND 6 Write Gate
7 GND 8 Config/Stat Data
9 GND 10 Transfer Ack
11 GND 12 Attn
13 GND 14 Head Sel 0
15 GND 16 Sect/Add MK Found
17 GND 18 Head Sel 1
19 GND 20 Index
21 GND 22 Ready
23 GND 24 Trans Req
25 GND 26 Drive Sel 1
27 GND 28 Drive Sel 2
29 GND 30 Drive Sel 3
31 GND 32 Read Gate
33 GND 34 Command Data

ESDI Hard Disk Interface
Data cable 
Connector:20 pin header
pin assignment pin assignment
1 Drive Selected 2 Sect/Add MK Found
3 Seek Complete 4 Addr Mark Enable
5 (reserved) 6 GND
7 Write Clk+ 8 Write Clk-
9 Cartridge Chng 10 Read Ref Clk+
11 Read Ref Clk- 12 GND
13 NRZ Write Data+ 14 NRZ Write Data-
15 GND 16 GND
17 NRZ Read Data+ 18 NRZ Read Data-
19 GND 20 GND

RLL/MFM Hard Disk Interface
Command cable
Connector:34 pin header
pin assignment pin assignment
1 GND 2 Head Sel 8
3 GND 4 Head Sel 4
5 GND 6 Write Gate
7 GND 8 Seek Complete
9 GND 10 Track 0
11 GND 12 Write Fault
13 GND 14 Head Sel 1
15 GND 16 (reserved)
17 GND 18 Head Sel 2
19 GND 20 Index
21 GND 22 Ready
23 GND 24 Step
25 GND 26 Drive Sel 1
27 GND 28 Drive Sel 2
29 GND 30 Drive Sel 3
31 GND 32 Drive Sel 4
33 GND 34 Direction In

RLL/MFM Hard Disk Interface
Data cable
Connector:20 pin header
pin assignment pin assignment
1 Drive Selected 2 GND
3 (reserved) 4 GND
5 (reserved) 6 GND
7 (reserved) 8 GND
9 (reserved) 10 (reserved)
11 GND 12 GND
13 Write Data+ 14 Write Data-
15 GND 16 GND
17 Read Data+ 18 NRZ Read Data-
19 GND 20 GND

Single ended SCSI-1,SCSI-2 external
Connector:50 pin Centronics
1-12 GND
13 No Connection
14-25 GND
26-33 Data0-Data7
34 Data Parity
35 GND
36 GND
37 Reserved
38 Terminator Power
39 Reserved
40 GND
41 -ATN
42 GND
43 -BSY
44 -ACK
45 -RST
46 -MSG
47 -SEL
48 -C/D
49 -REQ
50 -I/O

Single ended SCSI-1/SCSI-2 internal
Connector: 50 pin header
Same as above, except:
37 GND
39 GND
(The two Reserved pins)

Differential SCSI-1/SCSI-2 external
Connector: 50 pin Centronics
1 GND
2-9 +Data0 - +Data7 
10 +Data Parity
11 DIFFSENS
12 Reserved
13 Terminator Power
14 Reserved
15 +ATN
16 GND
17 +BSY
18 +ACK
19 +RST
20 +MSG
21 +SEL
22 +C/D
23 +REQ
24 +I/O
25 GND
26 GND
27-34 -Data0 - -Data7 
34 -Data Parity
36 GND
37 Reserved
38 Terminator Power
39 Reserved
40 -ATN
41 GND
42 -BSY
43 -ACK
44 -RST
45 -MSG
46 -SEL
47 -C/D
48 -REQ
49 -I/O
50 GND

Differential SCSI-1/SCSI-2 internal
Connector: 50 pin header
same as external

25 Pin SCSI:
Warning: Based on the pinout of an Apple connector, who is not famous for
adhering to standards.
Connector:D25
D25 Centronics 50
1 49
2 46
3 50
4 45
5 44
6 43
7 16,18,19 GND
8 26
9 20-22 GND
10 29
11 31
12 32
13 33
14 1-3 GND
15 48
16 4-6 GND
17 41
18 7-9,11 GND
19 47
20 34
21 27
22 28
23 30
24 23-25 GND
25 38

This pinout does not have a sufficient number of ground lines (they are
paired with the data lines) to meet SCSI standards. Avoid it at all
costs, especially if you're using more than SCSI-1.

Sun extra chunky SCSI-1
Connector: D50 (3 rows of pins)
1 GND
2 data0
3 GND
4 data1
5 GND
6 data2
7 GND
8 data3
9 GND
10 data4
11 GND
12 data5
13 GND
14 data6
15 GND
16 data7
17 GND
18 parity
19-24 GND
25 ?
26 ?
27-31 GND
32 Attention
33-35 GND
36 Busy
37 GND
38 Ack
30 GND
40 Reset
41 GND
42 Message
43 GND
44 Select
45 GND
46 Command/Data
47 GND
48 Request
49 GND
50 Input/Output

Analog interfaces:
10 pin Video Connector found on some old video cameras. From an
RCA CC010, and Panasonic 3110.
Connector: 10 pin video
1 video signal
2 video ground
3 C. Remote
4 Record
5 Standby
6 C. Pus
7 audio signal
8 audio ground
9 power ground
10 power +12VDC

pins 3-6 are various controls from the camera back to the VCR.

Radio port on a MFJ 1270C/1276 TNC2 packet radio TNC
Connector: 5 pin DIN
1 audio out (to radio)
2 ground
3 Push to talk
4 audio in (from radio)
5 Squelch in

push to talk is grounded when transmitting, floating otherwise.

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