Pinouts

These pinouts are for general reference... Whatever happens when you use (or don't use) them is not my fault. I make typos - use at your own risk.

Serial | Parallel | Joystick/MIDI | CGA | Monochrome | VGA | AT_Keyboard | PS/2 | AT_Power_Supply | ATX_Power_Supply | RJ45_Network_Connector | ISA/VESA | PCI | 8086 | 8088 | 80286 | 80386 | 80486 | Pentium | Slot 1 (PII/III)
Null_Modem | Null_Hub_Cable | Cat5_Cable | LapLink | DC20_Digital_Camera | ZIP_Drive | Compaq_1525_VGA_Monitor | T1 CSU/DSU to NI Cable | BRI Cable

Serial port

               DB25 - Male
_________________________________________
\ 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 /
  -------------------------------------

               DB9 - Male
              _____________
              \ 1 2 3 4 5 /
               \ 6 7 8 9 /
                ---------
DB9 pinDB25 pinConnection
18Carrier detect
23Recieve data
32Transmit data
420Data terminal ready
57Ground
66Data set ready
74Request to send
85Clear to send
922Ring
1Ground
9,10Reserved
12Secondary rcvd line sig. det.
13Secondary clear to send
14Secondary transmit data
15Transmission signal element timing
16Secondary recieve data
17Recieve timing
19Secondary request to send
21Signal quality
23Signal rate select
24Transmission signal timing
All others unassigned

Note: It is common for only pins 2,3,4,5,6,7,8,20 & 22 to be connected on a DB25 plug. (aka the ones with a DB9 equivilent)


Parallel port

                         DB25 - Male
          _________________________________________
          \ 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 /
            -------------------------------------

                      Centronics - Male
 ___________________________________________________________
(   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 26 27 28 29 30 31 32 33 34 35 36 /
   -------------------------------------------------------
DB25 pinCentronics pinConnection
11Strobe (low during data xfer)
22Bit 0
33Bit 1
44Bit 2
55Bit 3
66Bit 4
77Bit 5
88Bit 6
99Bit 7
1010Acknowledge (low when printer rcvs char)
1111Busy (high when busy)
1212Paper out (high when out)
1313Online (high when online)
1414Line Feed (low when printer should turn CR to CR+LF)
1532Error (low when error)
1631Initialize (low to initialize)
1736Select (low selects printer)
18-2519-30,33Signal ground
15unused
160V
17Chassis ground
18+5V
34,35unused

Joystick/MIDI Port

       DB15 - Male
__________________________
\ 1  2  3  4  5  6  7  8 /
 \  9 10 11 12 13 14 15 /
  ----------------------
PinDescription
1+5V
2Joystick 1 button 1
3Joystick 1 X
4Ground
5Ground
6Joystick 1 Y
7Joystick 1 button 2
8+5V
9+5V
10Joystick 2 button 1 (or joy 1 button 3)
11Joystick 2 X
12MIDI out (or ground on some sound cards)
13Joystick 2 Y (or joy 1 hat)
14Joystick 2 button 2 (or joy 1 button 4)
15MIDI in (+5V on some sound cards)
Note: Only one high end 4 button joystick (or joystick with a hat) can be used on a system at once due to pin conflicts. Game cards with two ports won't help as the conflict exists at the software level as well.

CGA Plug

               DB9 - Male
              _____________
              \ 1 2 3 4 5 /
               \ 6 7 8 9 /
                ---------
PinConnection
1Ground
2Shield Ground
3Red
4Green
5Blue
6Intensity
7Reserved
8Horizontal sync
9Vertical sync

Monchrome Plug

               DB9 - Male
              _____________
              \ 1 2 3 4 5 /
               \ 6 7 8 9 /
                ---------
PinConnection
1Ground
2Shield Ground
3N/C
4N/C
5N/C
6+ intensity
7+ video
8+ horizontal
9- vertical

VGA Plug

______________________
\   1  2  3  4  5    /
 \ 6  7  8  9 10    /
  \ 11 12 13 14 15 /
   ----------------
PinConnection
1Red
2Green
3Blue
4Monitor ID bit 2
5Signal ground
6Red return
7Green return
8Blue return
9Key (sometimes no pin or hole)
10Signal ground
11Monitor ID bit 0
12Monitor ID bit 1
13Horizontal sync
14Vertical sync
15Reserved
Note: Some pins are often not used.

AT Keyboard Plug

DIN 5-pin round

   1       5
    2     4
       3
PinDescription
1Clock
2Data
3Reset
4Ground
5+5V

Male PS/2 Plug (Keyboard/Mouse)

6-pin mini DIN

  5    6
 3  []  4
   1  2
PinDescription
1Data
2Reserved
3Ground
4+5V
5Clock
6Reserved

Mainboard Power Supply

BACK OF SYSTEM BOARD
    ------------------------------
        |    |              ---   |
        ------      P      |. |1  |
       KEYBOARD     O      |. |2  |
       CONNECTOR    W    P |. |3  |
                    E    8 |. |4  |
                    R      |. |5  |
                           |. |6  |
                    S       ---   |
                    U       ---   |
                    P      |. |1  |
                    P      |. |2  |
                    L    P |. |3  |
                    Y    9 |. |4  |
                           |. |5  |
                    CONN.  |. |6  |
                            ---   |
PinP8 ColorP8 DescriptionP9 ColorP9 Description
1OrangePower GoodBlackGround
2Red+5VBlackGround
3Yellow+12VWhite-5V
4Blue-12VRed+5V
5BlackGroundRed+5V
6BlackGroundRed+5V

ATX Power Supply

                ____           1
    1  2  3  4 |5  6| 7  8  9  0
 ----------------------------------
 | \_/|_||_|\_/\_/|_||_|\_/\_/|_| |  (Connector from Power Supply)
 | |_|\_/\_/|_||_|\_/\_/|_||_|\_/ |
 ----------------------------------
    1  1  1  1  1  1  1  1  1  2
    1  2  3  4  5  6  7  8  9  0

PinColorDescription
1Orange+3.3V
2Blue-12V
3BlackGround
4GreenPower Switch
5BlackGround
6BlackGround
7BlackGround
8White-5V
9Red+5V
10Red+5V
11Orange+3.3V
12Orange+3.3V
13BlackGround
14Red+5V
15BlackGround
16Red+5V
17BlackGround
18GreyPower Good
19Purple+5VSB
20Yellow+12V

Male RJ45 Connector

I-----------------------------------
I                                  |
I   I------I                 ----1-| TxData +
I   I      I                 ----2-| TxData -
I   I      I   - - - - - - - ----3-| RxData +
I   I      I  :              ----4-|
I   I      I  :              ----5-|
I   I      I   - - - - - - - ----6-| RxData -
I   I      I                 ----7-|
I   I------I                 ----8-|
I                                  |
I-----------------------------------

Pins on top, clip underneath.

ISA/VESA Slot

(Top of         (Bottom of
PC card)	  PC card)
          ----
 I/O CH CK|  |GND
        D7|  |RESET DRV
        D6|  |+5V
        D5|  |IRQ2
        D4|  |-5V
        D3|  |DRQ2
        D2|  |-12V
        D1|  |0WS
        D0|  |+12V
I/O CH RDY|  |GND
       AEN|  |SMEMW
       A19|  |SMEMR
       A18|  |IOW
       A17|  |IOR
       A16|  |DACK3      8-bit section
       A15|  |DRQ3
       A14|  |DACK1
       A13|  |DRQ1
       A12|  |REF
       A11|  |CLK
       A10|  |IRQ7
        A9|  |IRQ6
        A8|  |IRQ5
        A7|  |IRQ4
        A6|  |IRQ3
        A5|  |DACK2
        A4|  |TC
        A3|  |ALE
	A2|  |+5V
	A1|  |OSC
        A0|  |GND
	  ----
	  ----
      SBHE|  |MEM CS16
      LA23|  |I/O CS16
      LA22|  |IRQ10
      LA21|  |IRQ11
      LA20|  |IRQ12
      LA19|  |IRQ15
      LA18|  |IRQ14
      LA17|  |DACK0      optional 16-bit section
      MEMR|  |DRQ0
      MEMW|  |DACK5
       SD8|  |DRQ5
       SD9|  |DACK6
      SD10|  |DRQ6
      SD11|  |DACK7
      SD12|  |DRQ7
      SD13|  |+5V
      SD14|  |MASTER
      SD15|  |GND
          ----
          ----
        D1|  |D0
        D3|  |D2
       GND|  |D4
        D5|  |D6
        D7|  |D8
        D9|  |GND
       D11|  |D10
       D13|  |D12
       D15|  |Vcc
       GND|  |D14
       D17|  |D16
       Vcc|  |D18
       D19|  |D20
       D21|  |GND
       D23|  |D22
       D25|  |D24
       GND|  |D26
       D27|  |D28
       D29|  |D30
       D31|  |Vcc        optional VESA-Local section
       A30|  |A31
       A28|  |GND
       A26|  |A29
       GND|  |A27
       A24|  |A25
       A22|  |A23
       Vcc|  |A21
       A20|  |A19
       A18|  |GND
       A16|  |A17
       A14|  |A15
       A12|  |Vcc
       A10|  |A13
        A8|  |A11
       GND|  |A9
        A6|  |A7
        A4|  |A5
     WBACK|  |GND
       BE0|  |A3
       Vcc|  |A2
       BE1|  |free
       BE2|  |RESET
       GND|  |D/C
       B33|  |M/IO
       ADS|  |W/R
          ----

PCI Slot

(Top of    (Bottom of
PC card)    PC card)   when installed
       ----

TRST   |  | -12V
+12V   |  | TCK
TMS    |  | GND
TDI    |  | TDO
+5V    |  | +5V
INTA   |  | +4V
INTC   |  | INTB
+5V    |  | INTD
res    |  | PRSNT1
+5VI/O |  | res
res    |  | PRSNT2
GND    |  | GND
GND    |  | GND
res    |  | res
RST    |  | GND
+5VI/O |  | CLK
GNT    |  | GND
GND    |  | REQ
res    |  | +5VI/O
AD30   |  | AD31
+3.3V  |  | AD29
AD28   |  | GND
AD26   |  | AD27
GND    |  | AD25
AD24   |  | +3.3V
IDSEL  |  | C/BE3
+3.3V  |  | AD23
AD22   |  | GND
AD20   |  | AD21
GND    |  | AD19
AD18   |  | +3.3V
AD16   |  | AD17
+3.3V  |  | C/BE2
FRAME  |  | GND
GND    |  | IRDY
TRDY   |  | +3.3V
GND    |  | DEVSEL
STOP   |  | GND
+3.3V  |  | LOCK
SDONE  |  | PERR
SBO    |  | +3.3V
GND    |  | SERR
PAR    |  | +3.3V
AD15   |  | C/BE1
+3.3V  |  | AD14
AD13   |  | GND
AD11   |  | AD12
GND    |  | AD10
AD9    |  | GND
       ----
       ----
C/BE0  |  | AD8
+3.3V  |  | AD7
AD6    |  | +3.3V
AD4    |  | AD5
GND    |  | AD3
AD2    |  | GND
AD0    |  | AD1
+5VI/O |  | +5VI/O
REQ64  |  | ACK64
+5V    |  | +5V
+5V    |  | +5V
       ----      -- Most slots stop here at 32-bits
       ----         very few use the full 64-bits
GND    |  | res
C/BE7  |  | GND
C/BE5  |  | C/BE6
+5VI/O |  | C/BE4
PAR64  |  | GND
AD62   |  | AD63
GND    |  | AD61
AD60   |  | +5VI/O
AD58   |  | AD59
GND    |  | AD57
AD56   |  | GND
AD54   |  | AD55
+5VI/O |  | AD53
AD52   |  | GND
AD50   |  | AD51
GND    |  | AD49
AD48   |  | +5VI/O
AD46   |  | AD47
GND    |  | AD45
AD44   |  | GND
AD42   |  | AD43
+5VI/O |  | AD41
AD40   |  | GND
AD38   |  | AD39
GND    |  | AD37
AD36   |  | +5VI/O
AD34   |  | AD35
GND    |  | AD33
AD32   |  | GND
res    |  | res
GND    |  | res
res    |  | GND
       ----

i8086/8087

                  Minimum Maximum
        -------                                -------
GND  --|1  U 40|-- Vcc                 GND  --|1  U 40|-- Vcc
A14  --|       |-- A15                 A14  --|       |-- A15
A13  --|       |-- A16/S3              A13  --|       |-- A16/S3
A12  --|       |-- A17/S4              A12  --|       |-- A17/S4
A11  --|       |-- A18/S5              A11  --|       |-- A18/S5
A10  --|       |-- A19/S6              A10  --|       |-- A19/S6
A9   --|       |-- BHE/S7              A9   --|       |-- BHE/S7
A8   --|       |-- MN/MX               A8   --|       |-- RQ/GT1
AD7  --|   8   |-- RD                  AD7  --|   8   |-- INT
AD6  --|   0   |-- RQ/GT0  HOLD        AD6  --|   0   |-- RQ/GT0
AD5  --|   8   |-- RQ/GT1  HLDA        AD5  --|   8   |-- free
AD4  --|   6   |-- LOCK    WR          AD4  --|   7   |-- free
AD3  --|       |-- S2      IO/M        AD3  --|       |-- S2
AD2  --|       |-- S1      DT/R        AD2  --|       |-- S1
AD1  --|       |-- S0      DEN         AD1  --|       |-- S0
AD0  --|       |-- QS0     ALE         AD0  --|       |-- QS0
NMI  --|       |-- QS1     INTA        NMI  --|       |-- QS1
INTR --|       |-- TEST                INTR --|       |-- BUSY
CLK  --|       |-- READY               CLK  --|       |-- READY
GND  --|       |-- RESET               GND  --|       |-- RESET
        -------                                -------

i8088

                  Minimum Maximum
        -------
GND  --|1  U 40|-- Vcc
A14  --|       |-- A15
A13  --|       |-- A16/S3
A12  --|       |-- A17/S4
A11  --|       |-- A18/S5
A10  --|       |-- A19/S6
A9   --|       |-- high    SS0
A8   --|       |-- MN/MX
AD7  --|   8   |-- RD
AD6  --|   0   |-- RQ/GT0  HOLD
AD5  --|   8   |-- RQ/GT1  HLDA
AD4  --|   8   |-- LOCK    WR
AD3  --|       |-- S2      IO/M
AD2  --|       |-- S1      DT/R
AD1  --|       |-- S0      DEN
AD0  --|       |-- QS0     ALE
NMI  --|       |-- QS1     INTA
INTR --|       |-- TEST
CLK  --|       |-- READY
GND  --|       |-- RESET
        -------

80286

                C
                O                                       
                D                                       
                /        R     P                       E
          L  M  I  H  H  E     E        f  I  f  f  B  R   
          O  /  N  L  O  A  V  R  G  N  r  N  r  r  U  R  C
          C  I  T  D  L  D  c  E  N  M  e  T  e  e  S  O  A
          K  O  A  A  D  Y  c  Q  D  I  e  R  e  e  Y  R  P
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
          -------------------------------------------------
         /6                                               5 \
        /O8                                               2  \
BHE   --| 1                                               51 |-- D15
free  --|                                                    |-- D7
free  --|                                                    |-- D14
S1    --|                                                    |-- D6
S0    --|                                                    |-- D13
PEACK --|            ##### ##### ##### ##### #####           |-- D5
A23   --|            #   # #   #     # #   # #               |-- D12
A22   --|            ##### #   # ##### ##### #####           |-- D4
GND   --|            #   # #   # #     #   # #   #           |-- D11
A21   --|            ##### ##### ##### ##### #####           |-- D3
A20   --|                         PLCC                       |-- D10
A19   --|                                                    |-- D2
A18   --|                                                    |-- D9
A17   --|                                                    |-- D1
A16   --|                                                    |-- D8
A15   --|                                                    |-- D0
A14   --| 17                                              35 |-- GND
        \ 1                                               3 /
         \8                                               4/
          -------------------------------------------------
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
          A  A  A  A  A  A  A  A  A  A  A  R  V  C  A  A  A
          1  1  1  1  9  8  7  6  5  4  3  E  c  L  2  1  0
          3  2  1  0                       S  c  K         
                                           E
                                           T

80286-PGA (pin assignments are the same as for the PLCC version)

1 3 5 7 911131517
68 2 4 6 8101214161918
6667 2120
6465 2322
6263 2524
6061 2726
5859 2928
5657 3130
5455 3332
5253504846444240383634
514947454341393735

80287

        -------                                    f
free --|1  U 40|-- free                    V D D G r V D D D
free --|       |-- CKM                 D D c 1 1 N e c 1 1 1
free --|       |-- free                8 9 c 0 1 D e c 2 3 4
free --|       |-- free                | | | | | | | | | | |
D15  --|       |-- PEACK              /----------------------
D14  --|       |-- RESET     D7    --|18                    6|-- free
D13  --|       |-- NPS1      D6    --|                       |-- D15
D12  --|       |-- NPS2      D5    --|                       |-- GND
Vcc  --|   8   |-- CLK       D4    --|                       |-- Vcc
GND  --|   0   |-- CMD1      D3    --|         80287         |-- GND
D11  --|   2   |-- GND       free  --|                      1|-- Vcc
D10  --|   8   |-- CMD0      D2    --|         PLCC        44|-- CKM
free --|   7   |-- NPWR      D1    --|                       |-- GND
D9   --|       |-- NPRD      D0    --|                       |-- Vcc
D8   --|       |-- ERROR     PEREQ --|                       |-- PEACK
D7   --|       |-- BUSY      BUSY  --|28                   40|-- free
D6   --|       |-- PEREQ              -----------------------
D5   --|       |-- D0                  | | | | | | | | | | |
D4   --|       |-- D1                  E N N C f G C C N N R
D3   --|       |-- D2                  R P P M r N M L P P E
        -------                        R R W D e D D K S S S
                                       O D R 0 e   1   2 1 E
                                       R                   T

i386SX

                   G  V                 V        D  D  D  G  V  D  D  D  A  A  G  G  A
    __       D  D  N  c  D  D  D  D  D  c  D  D  1  1  1  N  c  1  1  1  2  2  N  N  2       __
   /  \      1  2  D  c  3  4  5  6  7  c  8  9  0  1  2  D  c  3  4  5  3  2  D  D  1      /  \
  /      \   |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |   /      \
 |          \-------------------------------------------------------------------------/         |
  \     O    1                                                                       7        /
     \       0                                                                       6     /
        \    0                                                                          /
D0    --| 1                                                                          75 |-- A20
GND   --|                                                                               |-- A19
HLDA  --|                                                                               |-- A18
HOLD  --|                                                                               |-- A17
GND   --|                                                                               |-- Vcc
NA    --|                                                                               |-- A16
READY --|                                                                               |-- Vcc
Vcc   --|                                                                               |-- GND
Vcc   --|                          # ##### ##### ##### ##### #   #                      |-- GND
Vcc   --|                                # #   # #     #      # #                       |-- A15
GND   --|                          #  #### ##### ##### #####   #                        |-- A14
GND   --|                          #     # #   # #   #     #  # #                       |-- A13
GND   --|                          # ##### ##### ##### ##### #   #                      |-- GND
GND   --|                                                                               |-- A12
CLK2  --|                                                                               |-- A11
ADS   --|                                                                               |-- A10
BLE   --|                                                                               |-- A9
A1    --|                                                                               |-- A8
BHE   --|                                                                               |-- Vcc
free  --|                                                                               |-- A7
Vcc   --|                                                                               |-- A6
GND   --|                                                                               |-- A5
M/IO  --|                                                                               |-- A4
D/C   --|                                                                               |-- A3
W/R   --| 25                                                                         51 |-- A2
        /    2                                                                       5    \
     /       6                                                                       0        \
  /          _________________________________________________________________________           \
 |          /|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\          |
  \      /   C  f  F  f  f  f  V  R  B  G  E  P  N  V  I  G  V  f  f  f  f  f  V  G  G   \      /
   \__/      L  r  L  r  r  r  c  E  U  N  R  E  M  c  N  N  c  r  r  r  r  r  c  N  N      \__/
             O  e  T  e  e  e  c  S  S  D  R  R  I  c  T  D  c  e  e  e  e  e  c  D  D
             C  e     e  e  e     E  Y     O  E        R        e  e  e  e  e
             K                    T        R  Q

i387SX Math Co-processor

                                                   C  N
                                          R        P  U
                                          E  P     U  M
         f  f    f                        A  E     C  C  f
         r  r  G  r  V  G  V  G  G  C  V  D  R  G  L  L  r
         e  e  N  e  c  N  c  N  N  K  c  Y  E  N  K  K  e
         e  e  D  e  c  D  c  D  D  M  c  0  Q  D  2  2  e
         |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
         -------------------------------------------------
        /6                                               5 \
       /O8                                               2  \
free --| 1                                               51 |-- RESETIN
D7   --|                                                    |-- Vcc
D6   --|                                                    |-- READY
Vcc  --|                                                    |-- CMD0
GND  --|                                                    |-- ADS
D5   --|           # ##### ##### ##### ##### #   #          |-- Vcc
D4   --|                 # #   #     # #      # #           |-- NPS2
D3   --|           # ##### #####     # #####   #            |-- NPS1
Vcc  --|           #     # #   #     #     #  # #           |-- Vcc
free --|           # ##### #####     # ##### #   #          |-- GND
D15  --|                         PLCC                       |-- W/R
D14  --|                                                    |-- STEN
Vcc  --|                                                    |-- Vcc
GND  --|                                                    |-- GND
D13  --|                                                    |-- Vcc
D12  --|                                                    |-- BUSY
free --| 17                                              35 |-- ERROR
       \ 1                                               3 /
        \8                                               4/
         -------------------------------------------------
         |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
         f  D  D  G  V  D  D  G  V  G  D  D  D  V  G  V  G
         r  0  1  N  c  2  8  N  c  N  9  1  1  c  N  c  N
         e        D  c        D  c  D     0  1  c  D  c  D

i386

     A B C D E F G H J K L M N P
     /---------------------------
 1  /o o o o o o o o o o o o o o |
 2 | o o o o o o o o o o o o o o |
 3 | o o o o o o o o o o o o o o |
 4 | o o o o               o o o |
 5 | o o o                 o o o |
 6 | o o o                 o o o |
 7 | o o o                 o o o |
 8 | o o o      i386       o o o | 
 9 | o o o                 o o o |
10 | o o o                 o o o |
11 | o o o                 o o o |
12 | o o o o o o o o o o o o o o |
13 | o o o o o o o o o o o o o o |
14 | o o o o o o o o o o o o o o |
    -----------------------------
A B C D E F G H J K L M N P
1Vcc GND A8 A11 A14 A15 A16 A17 A20 A21 A23 A26 A27 A30
2GND A5 A7 A10 A13 GND Vcc A18 GND A22 A24 A29 A31 Vcc
3A3 A4 A6 A9 A12 GND Vcc A19 GND A25 A28 Vcc GND D30
4free free A2 GND Vcc D29
5Vcc GND Vcc D31 D27 D26
6GND free free D28 D25 GND
7Vcc INTR free Vcc Vcc D24
8ERROR NMI PEREQ GND D23 Vcc
9GND BUSY RESET D20 D21 D22
10Vcc W/R LOCK GND D17 D19
11D/C GND GND D15 D16 D18
12M/IO free Vcc Vcc BE0 CLK2 Vcc D0 GND D7 Vcc D10 D12 D14
13BE3 BE2 BE1 NA free free READY D1 GND D5 D8 Vcc D11 D13
14Vcc GND BS16 HOLD ADS GND Vcc D2 D3 D4 D6 HLDA D9 GND

i387

     A B C D E F G H J K L
     /---------------------
 1  /  o o o o o o o o o   |
 2 | o o o o o o o o o o o |
 3 | o o               o o |
 4 | o o               o o |
 5 | o o               o o |
 6 | o o      i387     o o |
 7 | o o               o o |
 8 | o o               o o | 
 9 | o o               o o |
10 | o o o o o o o o o o o |
11 |   o o o o o o o o o   |
    -----------------------
A B C D E F G H J K L
1 D8 D7 D5 Vcc Vcc D3 D1 GND PEREQ
2 D9 GND D6 D4 GND GND D2 D0 Vcc BUSY ERROR
3 D11 D10 high READY0
4 D12 Vcc W/R STEN
5 D14 D13 Vcc GND
6 Vcc D15 NPS2 NPS1
7 D16 GND ADS Vcc
8 D18 D17 READY CMD0
9 Vcc D19 free high
10D21 D20 D23 D24 D26 Vcc D28 D30 GND CPUCLK2RESETIN
11 D22 GND D25 D27 GND D29 D31 CKM NUMCLK2

i486

     A B C D E F G H J K L M N P Q R S
     /---------------------------------
 1  /o o o o o o o o o o o o o o o o o |
 2 | o o o o o o o o o o o o o o o o o |
 3 | o o o o o o o o o o o o o o o o o |
 4 | o o o o                     o o o |
 5 | o o o                       o o o |
 6 | o o o                       o o o |
 7 | o o o                       o o o |
 8 | o o o                       o o o | 
 9 | o o o         i486          o o o |
10 | o o o                       o o o |
11 | o o o                       o o o |
12 | o o o                       o o o | 
13 | o o o                       o o o |
14 | o o o                       o o o |
15 | o o o o o o o o o o o o o o o o o |
16 | o o o o o o o o o o o o o o o o o |
17 | o o o o o o o o o o o o o o o o o |
    -----------------------------------
A B C D E F G H J K L M N P Q R S
1 D20 D19 D11 D9 GND DP1 GND GND Vcc GND GND GND D2 D0 A31 A28 A27
2 D22 D21 D18 D13 Vcc D8 Vcc D3 D5 Vcc D6 Vcc D1 A29 GND A25 A26
3 free GND CLK D17 D10 D15 D12 DP2 D16 D14 D7 D4 DP0 A30 A17 Vcc A23
4 D23 GND Vcc ENCOD A19 GND free
5 DP3 GND Vcc A21 A18 A14
6 D24 D25 D27 A24 Vcc GND
7 GND Vcc D26 A22 A15 A12
8 D29 D31 D28 A20 Vcc GND
9 GND Vcc D30 A16 Vcc GND
10free free free A13 Vcc GND
11GND Vcc free A9 Vcc GND
12free free free A5 A11 GND
13free free free A7 A8 A10
14free free free A2 Vcc GND
15NMI free FLUSH A20M HOLD KEN free BRDY BE2 BE0 PWT D/C LOCK HLDA BREQ A3 A6
16INTR free RESET BS8 Vcc RDY Vcc Vcc BE1 Vcc Vcc Vcc M/IO Vcc PLOCK BLAST A4
17AHOLD EADS BS16 BOFF GND BE3 GND GND PCD GND GND GND W/R GND PCHK free ADS

Intel Pentium 75 and up

     A  B  C  D  E  F  G  H  J  K  L  M  N  P  Q  R  S  T  U  V  W  X  Y  Z  AA AB AC AD AE AF AG AH AJ AK AL AM AN
    --------------------------------------------------------------------------------------------------------------
1  |       o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o |
2  |    o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o    | 
3  | o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o |
4  |    o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o    |
5  | o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o |
6  |    o     o     o                                                                                   o     o    |
7  | o     o     o                                                                                         o     o |
8  |    o     o                                                                                         o     o    |
9  | o     o     o                                                                                         o     o |
10 |    o     o                                                                                         o     o    |
11 | o     o                                                                                               o     o |
12 |    o     o                                                                                         o     o    |
13 | o     o                                                                                               o     o |
14 |    o     o                                                                                         o     o    |
15 | o     o                                                                                               o     o |
16 |    o     o                                                                                         o     o    |
17 | o     o                                                                                               o     o |
18 |    o     o                                                                                         o     o    |
19 | o     o                                            Pentium                                            o     o |
20 |    o     o                                       75 Mhz and up                                     o     o    |
21 | o     o                                             source                                            o     o |
22 |    o     o                                                                                         o     o    |
23 | o     o                                                                                               o     o |
24 |    o     o                                                                                         o     o    |
25 | o     o                                                                                               o     o |
26 |    o     o                                                                                         o     o    |
27 | o     o                                                                                               o     o |
28 |    o     o                                                                                         o     o    |
29 | o     o                                                                                               o     o |
30 |    o     o                                                                                         o     o    |
31 | o     o                                                                                               o     o |
32 |    o     o                                                                                         o     o    |
33 | o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o |
34 |    o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o    |
35 | o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o |
36 |    o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o    |
37 | o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o     o |
    ---------------------------------------------------------------------------------------------------------------
A B C D E F G H J K L M N P Q R S T U V W X Y Z A A AB AC AD AE AF AG AH AJ AK AL AM AN
1 INC D54 Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc V cc Vcc Vcc Vcc BREQ INC INC
2 INC D50 DP6 Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss AP ADSC#
3 INC D47 D52 D55 D57 D61 D63 PM0BP0 BP2 CACHE# EWBE# BRDYC# P HIT# PHITM# PBREQ# SMIACT# HLDA PWT INC
4 D43 D48 D51 D56 D59 D62 IERR# PM1BP1 MI/O# AHOLD BRDY# BOFF# HOLD PBGNT# PCHK# LOCK# DC# EADS#
5 D41 D45 D49 D53 D58 D60 DP7 FERR# BP3 INV KEN# NA# W B/WT# PRDY APCHK# PCD ADS# HITM# INC
6 Vss D44 DP5 HIT# W/R#
7 Vcc DP4 D46 BUSCHK# FLUSH#
8 Vss D40 A20M# Vss
9 Vcc D38 D42 BE0# Vcc
10 Vss D39 BE1# Vss
11 Vcc D36 BE2# Vcc
12 Vss D37 BE3# Vss
13 Vcc D34 BE4# Vcc
14 Vss D35 BE5# Vss
15 Vcc D32 BE6# Vcc
16 Vss D33 BE7# Vss
17 Vcc D31 SCVC Vcc
18 Vss DP3 CLK Vss
19 Vcc D29 NC Vcc
20 Vss D30 RESET Vss
21 Vcc D27 A20 Vcc
22 Vss D28 A19 Vss
23 Vcc D25 A18 Vcc
24 Vss D26 A17 Vss
25 Vcc DP2 A16 Vcc
26 Vss D23 A15 Vss
27 Vcc D24 A14 Vcc
28 Vss D19 A13 Vss
29 Vcc D21 A12 Vcc
30 D20 DP1 A9 Vss
31 D22 D17 A11 A10
32 D16 D12 A5 A8
33 D18 D14 D7 D3 PICD0 Vcc TD0 TRST# NC Vcc NC BF0 I NIT NMI A23 A27 A31 A7 A6
34 D13 D6 D5 PICCLK D0 TCK TMS NC Vcc STPCLK# BF1 PEN# SMI# INTR A21 A26 A29 A4
35 D15 D10 D6 D1 D2 PICD1 TD1 CPUTYP NC Vss NC FRCMC# I GNNE# RS# D/P# A24 A25 A3 NC
36 D11 DP0 D4 Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss A22 A28 A30
37 NC D9 Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc V cc Vcc Vcc Vcc Vss Vss Vss

Intel Pentium II and III

Allright... I'm drawing the line at 242 pins! You can get the information from Intel's official datasheets available
here or from Intel ( II / III ). You can get general technical literature of just about any sort from Intel here.

Specialty Cables


Null modem cable connections

DB9
NamePinConnects toPinName
TXD2
(--------)
3RXD
RXD3
(--------)
2RXD
Ground5
(--------)
5Ground

DB25
NamePinConnects toPinName
TXD3
(--------)
2RXD
RXD2
(--------)
3RXD
Ground7
(--------)
7Ground

RJ45 Cable to connect 2 computers without a hub

See RJ45 pinout.

1 <--> 3
2 <--> 6
3 <--> 1
4 <--> 4
5 <--> 5
6 <--> 2
7 <--> 7
8 <--> 8
Note: Color in caps means solid, lowercase means stripe color.
Connector1Connector2
PinWire Color
1green
2GREEN
3orange
4BLUE
5blue
6ORANGE
7brown
8BROWN
PinWire Color
1orange
2ORANGE
3green
4BLUE
5blue
6GREEN
7brown
8BROWN

CAT5 Cable wiring order (568A)

See RJ45 pinout.

PinWire ColorSignal
1greenTxData +
2GREENTxData -
3orangeRxData +
4BLUE
5blue
6ORANGERxData -
7brown
8BROWN

Laplink or Interlink cable connections

DB25
NamePinConnects toPinName
Bit 02
(--------)
15Error
Bit 13
(--------)
13Online
Bit 24
(--------)
12Paper out
Bit 35
(--------)
10Acknowledge
Bit 46
(--------)
11Busy
Acknowledge10
(--------)
5Bit 3
Busy11
(--------)
6Bit 4
Paper out12
(--------)
4Bit 2
Online13
(--------)
3bit 1
Error15
(--------)
2Bit 0
Ground25
(--------)
25Ground

Interface cable for Kodak DC20 Digital Camera

            Serial DB9 - Female              1/8" "Stereo" Jack  
              _____________                          ___
              \ 5 4 3 2 1 /      //---------//       | | A
               \ 9 8 7 6 /                           | | B
                ---------                             U  C
JackDB9Meaning
A5Ground
B3Transmit to Camera
C2Receive from Camera

Interface Cable for External Parallel ZIP drive

Just a simple straight through DB25 male to DB25 female cable, all pins connected.

Compaq 1525 Monitor

______________________
\   1  2  3  4  5    /
 \ 6  7  8  9 10    /
  \ 11 12 13 14 15 /
   ----------------
PinWireConnection
1PinkRed
2GreenGreen
3BlueBlue
4PurpleMonitor ID bit 2
5OrangeSignal ground
6N/CRed return
7N/CGreen return
8N/CBlue return
9N/AKey (sometimes no pin or hole)
10N/CSignal ground
11BlackMonitor ID bit 0
12GreyMonitor ID bit 1
13WhiteHorizontal sync
14YellowVertical sync
15BrownReserved
Note: The monitor ID bits are apparently used to convey the volume knob signal

T1 CSU/DSU to NI Cable

This cable is a straight-through 8-conductor cable with RJ48 male ends. The pin numbering is the same as for a
RJ45. This data came from here.
Pin Connection Description
1 R1 Receive from network (to CSU)
2 T1 Receive from network (to CSU)
4 T Transmit to network (from CSU)
5 R Transmit to network (from CSU)
All other pins are not connected.

BRI

This cable is a straight-through 8-conductor cable with
RJ45 male ends.
Pin TE NT Polarity
3 Transmit Receive +
4 Receive Transmit +
5 Receive Transmit -
6 Transmit Receive -
All other pins are not connected.