PC Connectors

Floppy drive

                      +--+
 2                    |oo| <       1    GND
 4                    |oo|         3    GND
 6                    |oo|         5    GND
 8    Index           |oo|         7    GND
10    Mot En A        |oo|         9    GND
12    Drv Sel B       |oo|        11    GND
14    Drv Sel A       |oo|        13    GND
16    Mot En B        |oo++       15    GND
18    Direction       |oo |       17    GND
20    Step Pulse      |oo++       19    GND
22    Write Data      |oo|        21    GND
24    Write Enable    |oo|        23    GND
26    Track 0         |oo|        25    GND
28    Write Protect   |oo|        27    GND
30    Read Data       |oo|        29    GND
32    Select Head 1   |oo|        31    GND
34                    |oo|        33    GND
                      +--+

Game / Midi

DA-15 Female


        8 7 6 5 4 3 2 1
    -----------------------
     \  o o o o o o o o  /
       \ o o o o o o o /
         -------------
                   1
         5 4 3 2 1 0 9 

 1    + 5 V (common for 1st set of pots)
 2    Button 1
 3    X Axis 1 (0-100 kOhm)
 4    GND (ground for button 1)
 5    GND
 6    Y Axis 1 (0-100 kOhm)
 7    Button 2
 8    + 5 V
 9    + 5 V (common for 2nd set of pots)
10    Button 4
11    X Axis 2 (0-100 kOhm)
12    Midi TX
13    Y Axis 2 (0-100 kOhm)
14    Button 3
15    Midi RX

IDE

                      +--+
 2    GND             |oo| <       1    -Reset
 4    DD  8           |oo|         3    DD  7
 6    DD  9           |oo|         5    DD  6
 8    DD 10           |oo|         7    DD  5
10    DD 11           |oo|         9    DD  4
12    DD 12           |oo|        11    DD  3
14    DD 13           |oo|        13    DD  2
16    DD 14           |oo|        15    DD  1
18    DD 15           |oo|        17    DD  0
20    Keypin          | o |       19    GND
22    GND             |oo |       21    DMARQ
24    GND             |oo|        23    -DIOW
26    GND             |oo|        25    -DIOR
28    SPSync          |oo|        27    IORDY
30    GND             |oo|        29    -DMACK
32    -IOCS16         |oo|        31    INTRQ
34    -PDiag          |oo|        33    DA 1
36    DA 2            |oo|        35    DA 0
38    -CS3FX          |oo|        37    -CS1FX
40    GND             |oo|        39    -DASP
                      +--+

ISA

                      +--+
B01   GND             |[]|        A01   -I/O CH CK
B02   RESET DRV       |[]|        A02   D7
B03   +5 V            |[]|        A03   D6
B04   IRQ 2           |[]|        A04   D5
B05   -5V             |[]|        A05   D4
B06   DRQ 2           |[]|        A06   D3
B07   -12 V           |[]|        A07   D2
B08   reserved        |[]|        A08   D1
B09   +12 V           |[]|        A09   D0
B10   GND             |[]|        A10   -I/O CH RDY
B11   -MEMW           |[]|        A11   AEN
B12   -MEMR           |[]|        A12   A19
B13   IOW             |[]|        A13   A18
B14   IOR             |[]|        A14   A17
B15   -DACK 3         |[]|        A15   A16
B16   DRQ 3           |[]|        A16   A15
B17   -DACK 1         |[]|        A17   A14
B18   DRQ 1           |[]|        A18   A13
B19   -DACK 0         |[]|        A19   A12
B20   CLK             |[]|        A20   A11
B21   IRQ 7           |[]|        A21   A10
B22   IRQ 6           |[]|        A22   A9
B23   IRQ 5           |[]|        A23   A8
B24   IRQ 4           |[]|        A24   A7
B25   IRQ 3           |[]|        A25   A6
B26   -DACK 2         |[]|        A26   A5
B27   T/C             |[]|        A27   A4
B28   ALE             |[]|        A28   A3
B29   +5 V            |[]|        A29   A2
B30   OSC             |[]|        A30   A1
B31   GND             |[]|        A31   A0
                      +--+ 
D01   MEM CS 16       |[]|        C01   -SBHE
D02   IO CS 16        |[]|        C02   A23
D03   1RQ 10          |[]|        C03   A22
D04   IRQ 11          |[]|        C04   A21
D05   IRQ 12          |[]|        C05   A20
D06   IRQ 15          |[]|        C06   A19
D07   IRQ 14          |[]|        C07   A18
D08   -DACK 0         |[]|        C08   A17
D09   DRQ 0           |[]|        C09   -MEMR
D10   -DACK 5         |[]|        C10   -MEMW
D11   DRQ 5           |[]|        C11   D8
D12   -DACK 6         |[]|        C12   D9
D13   DRQ 6           |[]|        C13   D10
D14   -DACK 7         |[]|        C14   D11
D15   DRQ 7           |[]|        C15   D12
D16   +5 V            |[]|        C16   D13
D17   -MASTER         |[]|        C17   D14
D18   GND             |[]|        C18   D15
                      +--+

Keyboard

1     CLK
2     DATA
3     -RESET
4     GND
5     +5 V

Power

 1    PG
 2    nc
 3    +12 V
 4    -12 V
 5    GND
 6    GND

 7    GND
 8    GND
 9    -5 V
10    +5 V
11    +5 V
12    +5 V

1     +12 V (max 60 W)
2     GND
3     GND
4     +5 V  (max 25 W)

RS 232

9 Pins

        1 2 3 4 5
    -----------------
     \  * * * * *  /
       \ * * * * /
         -------
         6 7 8 9

        DE-9 Male
1     DCD               Data Carrier Detect
2     RXD               Received Data
3     TXD               Transmitted Data
4     DTR               Data Terminal Ready
5     GND               GrouND

6     DSR               Data Set Ready
7     RTS               Request To Send
8     CTS               Clear To Send
9     RI                Ring Indicator

25 Pins

                          1
        1 2 3 4 5 6 7 8 9 0 1 2 3
    ---------------------------------
     \  * * * * * * * * * * * * *  /
       \ * * * * * * * * * * * * /
         -----------------------
                     2
         4 5 6 7 8 9 0 1 2 3 4 5

                DB-25 Male
 1    nc
 2    TXD               Transmitted Data
 3    RXD               Received Data
 4    RTS               Request To Send
 5    CTS               Clear To Send
 6    DSR               Data Set Ready
 7    GND               GrouND
 8    DCD               Data Carrier Detect
 9    TEST
10    TEST
11    STF               Select Transmit Frequency
12    SDCD              Secondary DCD
13    SCTS              Secondary CTS

14    STXD              Secondary TXD
15    TXC               DCE TX Clock
16    SRXD              Secondary RXD
17    RXC               RX Clock
18    nc
19    SRTS              Secondary RTS
20    DTR               Data Terminal Ready
21    SQ                Signal Quality
22    RI                Ring Indicator
23    CH/CI             rate select
24    XTC               DTE TX Clock
25    nc

Pin 1 used to be 'protective ground', but is now obsolete;
The shield is connected to the connector shell at both ends of the cable.

Video

Hercules

        5 4 3 2 1
    -----------------
     \  o o o o o  /
       \ o o o o /
         -------
         9 8 7 6

       DE-9 Female
1     GND
2     GND
3     R
4     G
5     B

6     I
7     MONO
8     HSYNC
9     -VSYNC

SCART

       2         1
       0 8 6 4 2 0 8 6 4 2
    +----------------------+
     \ | | | | | | | | | | |
      | | | | | | | | | | ||
      +--------------------+
      2         1
      1 9 7 5 3 1 9 7 5 3 1
 1    Right out
 3    Left out
 5    B Gnd
 7    B / B-Y (Pb)
 9    G Gnd
11    G / Y
13    R Gnd
15    R / R-Y (Pr) / Chroma
17    Sync / Video Gnd
19    Sync / Video out
21    Screen

 2    Right in
 4    Audio Gnd
 6    Left in
 8    Source select, 0...2 V no singnal, 4.5...7 V 16:9, 9.5...12 V 4:3  
10    D²B In
12    D²B Out
14    D²B + RGB selection GND
16    Insert 0...0.4 V Comp, 1...3 V RGB
18    Insert Gnd
20    Sync / Video in

VGA


        5 4 3 2 1
    -----------------
    \   o o o o o   /
     \ ₁₀o o₉o₈o₇o₆/
      \ o o o o o /
       ----------
        1 1 1 1 1
        5 4 3 2 1

     DE-15 Female


 1    R
 2    G
 3    B
 4    MID 2
 5    GND

 6    R ret
 7    G ret
 8    B ret
 9    key
10    SYNC ret

11    MID 0
12    MID 1
13    HSYNC
14    VSYNC
15    reserved