Pin-Out Assignments For Various Computer Connectors

Parallel - 25 Pin Connector (PC Side)
Pin Signal Description Direction
1 Strobe Out
2 Data 1 Out
3 Data 2 Out
4 Data 3 Out
5 Data 4 Out
6 Data 5 Out
7 Data 6 Out
8 Data 7 Out
9 Data 8 Out
10 Acknowledge In
11 Busy In
12 Paper Out In
13 Select In
14 Auto Feed Out
15 Error In
16 Initialize Printer Out
17 Select Input Out
18 Data 1 Ground
19 Data 2 Ground
20 Data 3 Ground
21 Data 4 Ground
22 Data 5 Ground
23 Data 6 Ground
24 Data 7 Ground
25 Data 8 Ground

36 Pin Centronix Connector
Pin Nmenomic Description
1 Strobe
2 Data 0
3 Data 1
4 Data 2
5 Data 3
6 Data 4
7 Data 5
8 Data 6
9 Data 7
10 ACK Acknowledge
11 Busy
12 Paper Out
13 Select
14 PI Auto LF (PI Ground)
15 PI (PI)
16 GND Ground
17 Frame Ground
18 +5 Volt Test
19 Ground
20 Ground
21 Ground
22 Ground
23 Ground
24 Ground
25 Ground
26 Ground
27 Ground
28 Ground
29 Ground
30 Ground
31 Input Prime (Spare)
32 SLCT Error
33 Ground
34 N/C (Spare)
35 +5V
36 Select In (Spare)

50 Pin Lineprinter Pinout

Large 50 Pin Connector (I'm making up my own numbering scheme)
Pin Mnemonic Description
1-2 Ready
1-3 On Line
1-4 Shorted to 1-5
1-5 Shorted to 1-4
1-6 Data Strobe
1-8 Data 6
1-9 Data 5
1-10 Data 4
1-11 Data 3
1-12 Data 2
1-13 Data 1
2-1 Ground - Ready
2-2 Ground - Online
2-4
2-5 Ground Data Strobe
2-7 Ground - Data 6
2-8 Ground - Data 5
2-9 Ground - Data 4
2-10 Ground - Data 3
2-11 Ground - Data 2
2-12 Ground - Data 1
3-3 Interface Verification
3-5 Data 7
3-6 Data 8
3-12 Data Request
3-13
4-3 Interface Verification
4-5 Ground - Data 7
4-6 Ground - Data 8
4-12 Ground - Data Request

Game/Joystick - 15 Pin Connector (Game Port Side/Standard "IBM" Type)
Pin Signal Description
1 +5 Volts DC
2 Button 0
3 Position 0
4 Ground
5 Ground
6 Position 1
7 Button 1
8 +5 Volts DC
9 +5 Volts DC
10 Button 2
11 Position 2
12 Ground
13 Position 3
14 Button 3
15 Button 2


Keyboard Connector Pinouts (PC Side)
Signal Description 5 Pin DIN

AT Type

 6 PinPS/2

Mini-DIN

 6 Pin

SDL
Keyboard data 2 1 B
Signal Ground 4 3 C
+5 Volts 5 4 E
Keyboard Clock 1 5 D
Not Used/Connected None 2 A
Not Used/Connected None 6 F
Not Used/Connected 3 None None



Pinouts - Serial (RS232/RS422A)




RS-323 25 Pin Serial Port
Pin Nmenomic Description
1 GND Frame Ground
2 TD Transmit Data
3 RD Receive Data
4 RTS Request To Send
5 CTS Clear To Send
6 DSR Data Set Ready
7 GND Signal Ground
8 CD Carrier Detect
9 Transmit Current Loop Return
11 Transmit Current Loop Data
18 Receive Current Loop Data
20 DTR Data Terminal Ready
22 RI Ring Indicator
25 Receive Current Loop Return




RS232C 9 Pin Connector
Pin Nmenomic Description
1 CD Carrier Detect
2 RD Receive Data
3 TD Transmit Data
4 DTR Data Terminal Ready
5 GND Signal Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator


6 Pin MMJ Connector

Digital MMJ Connector
Pin Nmenomic Description
1 DTR Dat Terminal Ready
2 TXD+ Transmited Data
3 TDX- Transmit Signal Ground
4 RXD- Receive Signal Ground
5 RXD+ Receive Signal
6 DSR Data Set Ready

RS-422A - 9 Pin Connector
Pin Nmenomic Description
1 GND Signal Ground
2 RD Receive Data
3 TD Transmit Data
4 DTR Data Terminal Ready
5 GND Signal Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator

RS-422A - 25 Pin Connector
Pin Nmenomic Description
2 TD Transmit Data
3 RD Receive Data
4 RTS Request To Send
5 CTS Clear Tp Send
6 DSR Data Set Ready
7 GND Signal Ground
8 CD Carrier Detect
20 DTR Data Terminal Ready
22 RI Ring Indicator