5pin DIN Male DB15-S Male 6pin MDIN Male
--+-- ---------------------- ---
/ ^ \ \ 1 2 3 4 5 / ] 2 1 [
| 1 3 | \ 6 7 8 9 10 / | 4 3 |
\ 425 / \ 11 12 13 14 15 / \6 5/
----- ---------------- -^-
DB9 (DE-9) Male DB15 (DA-15) Male
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\ 1 2 3 4 5 / \ 1 2 3 4 5 6 7 8 /
\ 6 7 8 9 / \ 9 10 11 12 13 14 15 /
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DB25 Male IDC-50 Male
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\ 1 2 3 4 5 7 8 ... 13 / | 1 3 5 7 ... 49 |
\ 14 15 16 17 18 .......25 / | 2 4 6 8 ... 50 |
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(Power Connector) Male RJ-45 (8 conductor phone) Male
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/ \ ------------------
| 4 3 2 1 | | 8 7 6 5 4 3 2 1 |
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Power Connector Male Speaker Connector Turbo Indicator Connector
pin assignment pin assignment pin assignment
1 +12V 1 -Speaker 1 +5V
2 +12V return 2 [key] 2 -High Speed
3 +5V return 3 GND 3 +5V
4 +5V 4 +Speaker +5V
AT LED Power and Key Lock AT Backup Battery
pin assignment pin assignment
1 LED power 1 Batt+
2 GND 2 [key]
3 GND 3 GND
4 Key Switch 4 GND
5 GND
MIDI 5pin DIN
MIDI In MIDI Out
pin assignment pin assignment
1 N/C 1 N/C
2 N/C 2 GND
3 N/C 3 N/C
4 Current Src 4 Current Sink
5 Current Sink 5 Current Src
Game Port DB15-Female
pin assignment pin assignment
1 +5V DC 2 Button 4 (A_PB1)
3 Position 0(A_X) 4 GND
5 GND 6 Position 1 (A_Y)
7 Button 5(A_PB2) 8 +5V DC
9 +5V DC 10 Button 6 (B_PB1)
11 Position 2(B_X) 12 GND
13 Position 3(B_Y) 14 Button 7 (B_PB2)
15 +5V DC
Serial Port DB9-Male DB25-Male
9-pin 25-pin assignment
1 8 DCD (Data Carrier Detect)
2 3 RX (Receive Data)
3 2 TX (Transmit Data)
4 20 DTR (Data Terminal Ready)
5 7 GND (Signal Ground)
6 6 DSR (Data Set Ready)
7 4 RTS (Request To Send)
8 5 CTS (Clear To Send)
9 22 RI (Ring Indicator)
Parallel Port DB25-Female
pin assignment pin assignment
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
11 Busy 12 Paper Empty
13 Select 14 -Auto Feed
15 -Error 16 -Init
17 -Slct in 18 GND
19 GND 20 GND
21 GND 22 GND
23 GND 24 GND
25 GND
Parallel Port Centronics-36
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
11 Busy 12 Paper Empty
13 Select 14 -Auto Feed
15 {OSCXT} 16 Signal GND
17 Frame GND 18 +5v
19 GND 20 GND
21 GND 22 GND
23 GND 24 GND
25 GND 26 GND
27 GND 28 GND
29 GND 30 GND
31 -Prime 32 -Error
33 Signal GND 34 N/C
35 N/C 36 N/C
10Base-T RJ-45 Male
pin assignment twisted pair color
1 TxData+ 2 White/Orange
2 TxData- 2 Orange
3 RxData+ 3 White/Green
4 - 1 Blue
5 - 1 White/Blue
6 RxData- 3 Green
7 - 4 White/Brown
8 - 4 Brown
10Base-T Crossover
Connector 1 to Connector 2
TxData+ RxData+
TxData- RxData-
RxData+ TxData+
RxData- TxData-
AT Keyboard Connector 5pin-DIN XT Keyboard Connector 5pin-DIN
pin assignment pin assignment
1 CLK/CTS (open-collector) 1 CLK/CTS (open-collector)
2 RxD/TxD/RTS (open-collector) 2 Keyboard Data
3 N/C 3 Reset
4 GND 4 GND
5 +5V 5 +5V
PS2 Keyboard/Mouse Connector 6pin-MDIN PS2 6pin-MDIN to AT 5pin-DIN Keyboard
pin assignment pin-PS2(F) pin-AT(M)
1 Data 1 2
2 N/C 2 N/C
3 GND 3 4
4 Vcc 4 5
5 CLK 5 1
6 N/C 6 N/C
VGA DB15-S Female DB9 Female
15-pin 9-pin assignment
1 1 Red
2 2 Green
3 3 Blue
4 - Monitor ID bit 2
5 - N/C
6 6 GND (red return)
7 7 GND (green return)
8 8 GND (blue return)
9 - N/C
10 - GND
11 - Monitor ID bit 0
12 - Minitor ID bit 1
13 4 Horizontal Sync
14 5 Vertical Sync
15 - N/C
Monitor ID bit 0: reserved
Monitor ID bit 1: GND = mono, OPEN = color
Monochrome monitors use the green signal
CGA DB9 Female
pin assignment
1 GND
2 GND
3 Red
4 Green
5 Blue
6 Intensity
7 (reserved)
8 Horizontal Sync
9 Vertical Sync
EGA DB9 Female
pin assignment
1 GND
2 Secondary Red
3 Primary Red
4 Primary Green
5 Primary Blue
6 Secondary Green / Intensity
7 Secondary Blue / Mono Video
8 Horizontal Drive
9 Vertical Drive
Null Modem:
Connector 1 to Connector 2
DTR DSR/DCD
DSR/DCD DTR
RTS CTS
CTS RTS
TXD RXD
RXD TXD
GND GND
Serial Port loopback:
Connected Pins
RX & TX
RTS & CTS
DCD & DTR & DSR & RI
Bidirectional (Laplink/Interlnk) Parallel Cable DB-25 male to DB-25 male
Connector 1 to Connector 2
2 15
3 13
4 12
5 10
6 11
10 5
11 6
12 4
13 3
15 2
16 16
17 17
25 25
Parallel Port loopback DB25 Male
Connected Pins
2 & 15
3 & 13
4 & 12
5 & 10
6 & 11
SCSI Connector Pinouts (Single Ended) IDC-50 Male
pin assignment|pin assignment|pin assignment|pin assignment
01 GND |02 -DB0 |27 GND |28 GND
03 GND |04 -DB1 |29 GND |30 GND
05 GND |06 -DB2 |31 GND |32 -ATN
07 GND |08 -DB3 |33 GND |34 GND
09 GND |10 -DB4 |35 GND |36 -BSY
11 GND |12 -DB5 |37 GND |38 -ACK
13 GND |14 -DB6 |39 GND |40 -RST
15 GND |16 -DB7 |41 GND |42 -MSG
17 GND |18 -DBP |43 GND |44 -SEL
19 GND |20 GND |45 GND |46 -C/D
21 GND |22 GND |47 GND |48 -REQ
23 GND |24 GND |49 GND |50 -I/O
25 (open) |26 TERMPWR
SCSI Connector Pinouts (Differential) IDC-50 Male
pin assignment|pin assignment|pin assignment|pin assignment
01 (open) |02 GND |27 GND |28 GND
03 +DB0 |04 -DB0 |29 +ATN |30 -ATN
05 +DB1 |06 -DB1 |31 GND |32 GND
07 +DB2 |08 -DB2 |33 +BSY |34 -BSY
09 +DB3 |10 -DB3 |35 +ACK |36 -ACK
11 +DB4 |12 -DB4 |37 +RST |38 -RST
13 +DB5 |14 -DB5 |39 +MSG |40 -MSG
15 +DB6 |16 -DB6 |41 +SEL |42 -SEL
17 +DB7 |18 -DB7 |43 +C/D |44 -C/D
19 +DBP |20 -DBP |45 +REQ |46 -REQ
21 DIFFSENS |22 GND |47 +I/O |48 -I/O
23 GND |24 GND |49 GND |50 GND
25 TERMPWR |26 TERMPWR
Macintosh SCSI Connector Pinouts (Single Ended) DB-25S Female
pin assignment|pin assignment|pin assignment|pin assignment
01 -REQ |08 -DB0 |14 GND |20 -DBP
02 -MSG |09 GND |15 -C/D |21 -DB1
03 -I/O |10 -DB3 |16 GND |22 -DB2
04 -RST |11 -DB5 |17 -ATN |23 -DB4
05 -ACK |12 -DB6 |18 GND |24 GND
06 -BSY |13 -DB7 |19 -SEL |25 NC (TERMPWR)
07 GND
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