.The official Csa2 (comp.sys.apple2) Usenet newsgroup Apple II FAQs
  originate from the II Computing Apple II site,1997-2009.

.Csa2 FAQs Resource file: R023PINOUTS.htm

       Apple II Pinouts . ....

         Compiled by Charles T. 'Dr. Tom' Turley

  •  #001  GS Motherboard power connector
  •  #002  Apple II+/IIe Power Supply Socket
  •  #003  9 pin game port connector
  •  #004  //e, //c, Laser, and Mac Plus Mouse pinouts
  •  #005  Apple 16-pin DIP Game Port socket for II, II+, IIe, IIgs
  •  #006  Apple II Joystick
  •  #007  //e expansion slot pinouts
  •  #008  IIc+ internal modem connector
  •  #009  Mini DIN-8 IIgs Serial Port (also IIc+ and Macintosh)
  •  #010  Cable to connect IIgs to a serial Dsub-25 printer
  •  #011  //c serial port pinouts
  •  #012  IIgs ADB (keyboard) socket
  •  #013  GS RGB monitor socket & monitor connections
  •  #014  6502 pinout
  •  #015  5.25" and 3.5" disk cables
  •  #016  Apple //c Video Expansion port
  •  #017  Apple //c Power Connector
  •  #018  Apple ][+/IIe 16-pin keyboard socket
  •  #019  Apple //e Kumeric Keypad matrix and connector
  •  #020  Apple //e Numeric Keypad cable

  • ___________________________

    .

    001 GS Motherboard power connector.      .to.top

      _
     | |
     |7|  -5V             0.25 A
     |6| -12V             0.25 A
     |5| +12V             1.0 A
     |4|  +5V             4.0 A
     |3|  No connection
     |2|  GND
     |1|  GND
     |_|

    The pins are numbered as above when you are sitting in front of the
    computer, i.e. 7 is closest to the back of the motherboard.
     
     

    ___________________________
     

    .
     

    002 Apple II+/IIe Power Supply Socket.      .to.top
     

     II+/IIe Power Supply Socket      Power Supply Output Ratings
             _________
            /         \               +5V @ 2.50 Amps (continuous)
      -12V  |  5   6  |   -5V         -5V @ 0.25 Amps (continuous)
            |         |              +12V @ 1.50 Amps (continuous)
       +5V  |  3   4  |  +12V        -12V @ 0.25 Amps (continuous)
            |         |
       GND  |  1   2  |   GND
            |_________|
     

    ___________________________
     
     

    .

    003 Apple Game Port (9-pin connector).      .to.top
     

    Dsub-9 Female Socket (on computer)
      ,---------------------.
      \  5   4   3   2   1  /
       \   9   8   7   6   /
        `-----------------'

    Pin 1 - Pushbutton 1
    Pin 2 - +5V Power
    Pin 3 - Ground
    Pin 4 - Game Control 2 or PDL2 (Joystick-2 X-axis)*
    Pin 5 - Game Control 0 or PDL0 (Joystick-1 X-axis)
    Pin 6 - Pushbutton 2*
    Pin 7 - Pushbutton 0 (usually the "Fire" button)
    Pin 8 - Game Control 1 or PDL1 (Joystick-1 Y-axis)
    Pin 9 - Game Control 3 or PDL3 (Joystick-2 Y-axis)*

    * Note: These functions are not available on the //c or IIc+.
     

    ___________________________
     

    .

    004 //e, //c, Laser 128, and Mac Plus Mouse pinouts.      .to.top

    The IIe/IIc/Mac Plus mouses can plug into the //c or IIc+
    Game/Mouse port or, on a IIe, into the 9-pin socket of a
    Mouse Card. When plugged into the //c or IIc+, several pins
    are redefined for use with a mouse.
    [Info from David Empson and David Wilson]
     
     

     Dsub-9 Female Socket on Computer    Dsub-9 Male Plug on Mouse
         ,---------------------.          ,---------------------.
         \  5   4   3   2   1  /          \  1   2   3   4   5  /
          \   9   8   7   6   /            \   6   7   8   9   /
           `-----------------'              `-----------------'

       Mouse         Usual //c, IIc+ Game Port Function

    1  MOUSE ID      Pushbutton 1
    2  +5V           +5V
    3  GND           GND
    4  XDIR          no Game Port function on //c, IIc+;
                     this TTL-compatible input can be read at $C066
    5  XMOVE         Game Control 0 or PDL0 (Joystick X-axis)
    6  n.c.          (no Game Port function on //c, IIc+)
    7  MOUSE BUTTON  Pushbutton 0
    8  YDIR          Game Control 1 or PDL1 (Joystick Y-axis)
    9  YMOVE         no Game Port function on //c, IIc+;
                     this TTL-compatible input can be read at $C067
     
     

    ___________________________
     
     

    .

    005 Apple 16-pin DIP Game Port socket (on the motherboard).      .to.top
      for II, II+, IIe, IIgs
     

                               =========
    Pushbutton 3 (GS only)  9 | *     * | 8  Ground
     Gm Ctrl 1 (Stick-1 Y) 10 | *     * | 7  Gm Ctrl 2 (Stick-2 X)
     Gm Ctrl 3 (Stick-2 Y) 11 | *     * | 6  Gm Ctrl 0 (Stick-1 X)
            Annunciator 3  12 | *     * | 5  /$C040 Strobe
            Annunciator 2  13 | *     * | 4  Pushbutton 2
            Annunciator 1  14 | *     * | 3  Pushbutton 1
            Annunciator 0  15 | *     * | 2  Pushbutton 0
            No Connection  16 | *     * | 1  +5V
                               ===| |===
                                   ^
                            Notch on socket
                    (faces toward front of computer)
     
     

    Game Port Information (with BASIC Peek/Poke locations) obtained
    from pages 430-433 of the Apple // User's Guide, Second Edition
    by Lon Poole:

    -16296 Annunciator 0 Off
    Turns off game control output (annunciator) number 0. The voltage
    on pin 15 of the game control is set to approximately
    0 volts (TTL low).

    -16295 Annunciator 0 On
    Turns on game control output (annunciator) number 0. The voltage
    on pin 15 of the game control is set to approximately
    +5 volts (TTL high).

    The following annunciator soft switches follow the same rules as
    annunciator 0 for their respective pin assignments:

    -16294 Annunciator 1 Off
    -16293 Annunciator 1 On
    -16292 Annunciator 2 Off
    -16291 Annunciator 2 On
    -16290 Annunciator 3 Off
    -16289 Annunciator 3 On

    -16287 Read Pushbutton 0
    When the pushbutton on game control number 0 or the open-apple key
    is being pressed, the value in this location exceeds 127. When it
    is not being pressed, the value is 127 or less.

    The following pushbutton soft switches follow the same rules as
    pushbutton 0 for their respective pin assignments:

    -16286 Read Pushbutton 1
    -16285 Read Pushbutton 2

    -16320 Stobe Output
    Normally pin 5 of the game control connector is +5 volts. If you
    PEEK memory location -16320, it drops to 0 volts for one-half
    microsecond. POKE will trigger the strobe twice.

    The following is a direct exerpt from page 167 of the Apple //e
    Reference Manual:

    "The hand-control inputs are connected to the timing inputs of an
    NE558 quadruple 555-type analog timer. Addressing $C07x sends a
    signal from the 74LS154 that resets all four timers and causes
    their outputs to go one (high). A variable resistance of up to
    150K ohms connected between one of these inputs and the +5V
    supply controls the charging time of one of four 0.022-microfarad
    capacitors. When the voltage on the capacitor passes a certain
    threshhold, the output of the NE558 changes back to zero (low).

    Programs can determine the setting of a variable resistor by
    resetting the timers and then counting time until the selected
    timer input changes from high to low. The resulting count is
    proportional to the resistance."

    Basically, the above excerpt is a long description of the
    BASIC PDL() function.
     
     

    ___________________________
     

    .
    .

    006   Apple II Joystick.      .to.top

     (9-pin male connector)                (Old 16-pin IC-style plug)

      [2]---------------  +5V                  ------- 1
      [7]---------------  Button 0 ("Fire")    ------- 2
      [5]---------------  X-axis               ------- 6
      [8]---------------  Y-axis               ------- 10
      [1]---------------  Button 1 ("Aux")     ------- 3
      [3]---------------  Ground               ------  8

    ___________________________
     

    .

    007 Apple //e Expansion (not memory) Slot pinout.      .to.top
     

    The following information is from pages 172-174 of the Apple //e
    Reference Manual regarding the pinout of the expansion slots.
    (A leading "~" to indicates an active Low signal.)

    Pin 1 - I/O SELECT - Normally high; goes low during phase 0 when
    the 6502 addresses location $CnXX, where n is the connector
    number. This line can drive 10 LS TTL loads.*

    Pin 2-17 - A0-A15 - Three-state address bus. The address becomes
    valid during phase 1 and remains valid during phase 0. Each
    address line can drive 5 LS TTL loads.*

    Pin 18 - R/~W - Buffered read/write line. Valid at the same time
    as the address bus; high during a read cycle, low during a write
     cycle. It can drive 2 LS TTL loads.*

    Pin 19 - ~SYNC - Composite horizontal and vertical sync, on
    expansion slot 7 ONLY. This line can drive 2 LS TTL loads.*

    Pin 20 - ~I/O STROBE - Normally high; goes low during phase 0
    when the 6502 addresses a location between $C800 and $CFFF.
    This line can drive 4 LS TTL loads.*

    Pin 21 - RDY - Input to the 6502. Pulling this line low during
    phase 1 halts the 6502 with the address bus holding the address
    of the location currently being fetched. This line has a
    3300 ohm pullup resistor to +5V.

    Pin 22 - ~DMA - Input to the address bus buffers. Pulling this
    line low during phase 1 disconnects the 6502 from the address
    bus. This line has a 3300 ohm pullup resistor to +5V.

    Pin 23 - INT OUT - Interrupt priority daisy-chain output.
    Usually connected to pin 28 (INT IN). Note: On slot 7 ONLY,
    this pin can be connected to the graphics-mode signal GR
    (Not available on revision A boards).

    Pin 24 - DMA OUT - DMA priority daisy-chain output. Usually
    connected to pin 22 (DMA IN).

    Pin 25 - +5V - +5V power supply. A total of 500mA is available
    for all accessory cards.

    Pin 26 - GND - System common ground.

    Pin 27 - DMA IN - DMA priority daisy-chain input. Usually
    connected to pin 24 (DMA OUT).

    Pin 28 - INT IN - Interrupt priority daisy-chain input. Usually
    connected to pin 23 (INT OUT).

    Pin 29 - ~NMI - Non-maskable interrupt to 6502. Pulling this
    line low starts an interrupt cycle with the interrupt-handling
    routine at location $03FB. This line has a 3300 ohm pullup
    resistor to +5V.

    Pin 30 - ~IRQ - Interrupt request to 6502. Pulling this line low
    starts an interrupt cycle only if the interrupt-disable (I) flag
    in the 6502 is not set. Uses the interrupt-handling routine at
    location $03FE. This line has a 3300 ohm pullup resistor to +5V.

    Pin 31 - ~RES - Pulling this line low initiates a reset routine.

    Pin 32 - ~INH - Pulling this line low during phase 1 inhibits
    (disables) the memory on the main circuit board. This line has
    a 3300 ohm pullup resistor to +5V.

    Pin 33 - -12V - -12V power supply. A total of 200mA is available
    for all accessory cards.

    Pin 34 - -5V - -5V power supply. A total of 200mA is available
    for all accessory cards.

    Pin 35 - 3.58M - 3.58MHz color reference signal, on slot 7 ONLY.
    This line can drive 2 LS TTL loads.*

    Pin 36 - 7M - System 7MHz clock. This line can drive
    2 LS TTL loads.*

    Pin 37 - Q3 - System 2MHz asymmetrical clock. This line can
    drive 2 LS TTL loads.*

    Pin 38 - PHASE1 - 6502 phase 1 clock. This line can drive
    2 LS TTL loads.*

    Pin 39 - uPSYNC - The 6502 signals an operand fetch by driving
    this line high during the first read cycle of each instruction.

    Pin 40 - PHASE0 - 6502 phase 0 clock. This line can drive
    2 LS TTL loads.*

    Pin 41 - ~DEVICE SELECT - Normally high; goes low during
    phase 0 then the 6502 addresses location $C0nX, where n is
    the connector number plus 8. This line can drive 10 LS TTL loads.*

    Pin 42-49 - D0-D7 - Three-state buffered bi-directional data bus.
    Data becomes valid during phase 0 high and remains valid until
    phase 0 goes low. Each data line can drive one LS TTL load.*

    Pin 50 - +12V - +12V power supply. A total of 250mA is available
    for all accessory cards.

    * Loading limits are for each card.

    ___________________________
     

    .

    008 Apple IIc+ internal modem connector.      .to.top

     __
    |1 | -5V     -5 Volts
    |2 | RXD     Receive Data
    |3 | TXD     Transmit Data
    |4 | DCD     Data Carrier Detect
    |5 | DTR     Data Terminal Ready
    |6 | DSR     Data Signal Ready
    |7 | GND     Ground
    |__|
     
     
     

    ___________________________
     

    .

    009 Mini DIN-8 IIgs Serial Port (also IIc+ and Macintosh).      .to.top

    The IIgs serial port is numbered as follows, looking at the back
    of the computer:
     

      Mini-Din 8
    IIgs Serial Port
    (Female) Socket

       8  7  6
       5   4 3
        2   1
     

    Pin  Signal Name and Description*

     1   HSKo Handshake output.  Driven uninverted from the
              SCC's /DTR output.
              Voh = 3.6V; Vol = -3.6V; Rl - 450 ohms
     2   HSKi Handshake input or external clock.  Received
              inverted at SCC's /CTS and /TRxC inputs.
              Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
     3   TxD- Transmit data (inverted).  Driven inverted
              from SCC's TxD output; tri-stated when SCC's
              /RTS is not asserted.
              Voh = 3.6V; Vol = -3.6V; Rl = 450 ohms
     4   GND  Signal ground.  Connected to logic and
              chassis ground.
     5   RxD- Receive data (inverted).  Received inverted
              at SCC's RxD input.
              Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
     6   TxD+ Transmit data.  Driven uninverted from SCC's
              TxD output; tri-stated when SCC's /RTS is not
              asserted.
              Voh = 3.6V; Vol = -3.6V; Rl = 450 ohms
     7   GPi  General-purpose input.  Received inverted at
              SCC's /DCD inputs.
              Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms
     8   RxD+ Receive data.  Received uninverted at SCC's
              RxD input.
              Vih = 0.2V; Vil = -0.2V; Ri = 12K ohms

    Note: Absolute values of specified voltages are minimums;
          Ri is a minimum, Rl is a maximum.

    *from IIgs tn030 1990 J. Luther & R. Reynolds
     
     

    ___________________________
     

    .

    010 Cable to connect IIgs to a serial Dsub-25 printer.      .to.top
     

    The wiring for a serial printer cable would be as follows:

    IIgs                 Printer (DB-25)

    1  Hshk Out   ---->  6 DSR  (or possibly 5 CTS, or 8 DCD)
    2  HShk In    <----  20 DTR (or possibly 4 RTS)
    3  TxD-       ---->  3 RxD
    4  Gnd        -----  7 Signal Ground
    5  RxD-       <----  2 TxD
    6  TxD+  No connection
    7  GPI   No connection
    8  RxD+  Loop to signal ground (pin 4 at IIgs or pin 7 at printer)

    (Cable shield should be connected to shielding at the IIgs end, and to
    pin 1 at the printer end.)

    ___________________________
     

    .

    011 //c (5-pin) serial port and modem cable pinouts.      .to.top
    (Most of this is from a post by David Empson.)
     

         Din 5
     //c Serial Port
     (Female) Socket

       5       1
        4     2
           3

    The functions are:

    1  Handshake Out (nominally DTR)
    2  Data Out (TxD)
    3  Ground
    4  Data In (RxD)
    5  Handshake In (nominally DSR)
     

         Din 5
    //c Serial Cable
      (Male) Plug

       1       5
        2     4
           3

    To wire up a IIc to a simple modem without hardware handshaking, use
    the following pinout:

    IIc     Modem
    DIN-5   Dsub-25M
    1 ----- 20 DTR
    2 ----- 2  TxD
    3 ----- 7  Gnd
    4 ----- 3  RxD
    5 ----- 6  DSR   (you might want to use pin 8, DCD in some cases)

    The IIc cannot do hardware handshaking very well, but this is as close
    as you can get:

    IIc     Modem
    DIN-5   Ddub-25M

    1 ----- 4  RTS
    2 ----- 2  TxD
    3 ----- 7  Gnd
    4 ----- 3  RxD
    5 ----- 5  CTS

    The IIc's handshaking lines have annoying side effects, which cause
    problems with hardware handshaking:

    1. The "Handshake Out" signal is implemented to mean "I want to send
       data" (the official and original meaning of RTS).  If you turn off
       the output handshake line, the IIc will stop sending data.  For a
       hardware handshaking modem, RTS is supposed to mean "You are allowed
       to send me data" (from the computer's point of view).

       If the computer tells the modem to stop transmitting, the computer
       will also be unable to transmit.  This will reduce the rate at which
       data can be transferred bidirectionally, but doesn't cause any other
       problems.

    2. The "Handshake In" signal is implemented to mean "There is receive data
       present" (the official meaning of DCD).  If the incoming handshake line
       is disabled, the IIc will stop receiving data (ignore any data on RxD).
       For a hardware handshaking modem, CTS is supposed to mean "You are
       allowed to send me data" (from the modem's point of view).

       If the modem tells the computer to stop transmitting, the computer will
       also be unable to receive, and will discard any data sent by the modem
       while CTS is not active.  This can cause screen corruption and loss of
       data blocks or acknowledgements during a file transfer, which will
       require retransmission.   It is only likely to be a problem while a
       lot of data is being sent, so is more likely to cause problems
       during a file upload than a download.

       If the comms software is quick enough, it can drop RTS immediately when
       CTS is lowered, which will prevent the modem from sending any more data.

    You will need the //c System Utilities disk to set up the serial port
    speeds, or a comm program that overrides them anyway.

    Max speed is 9600.
     

    ___________________________
     
     

    .

    012 IIgs ADB (keyboard) socket.      .to.top
     

              Female Mini-Din 4

                    4  3
       Ground ----- o  o ------ +5V
                  2      1
    reserved ---- o      o ---- Data
                    ___   / --- Shell (Gnd)
                   |___|
     

    Note: There is no connection on any IIgs to
          the "reserved" pin.
     
     

    ___________________________
     

    .

    013 IIGS RGB Connector.      .to.top

    Note: "Not used" indicates signals not used by the IIgs RGB monitor.
     

          Dsub-15 (female) socket at back of IIgs
           ,--------------------------------.
           \ 08  07  06  05  04  03  02  01 /
            \  15  14  13  12  11  10  09  /
             `----------------------------'
                                       |
                                       |
            pin #             signal   |
                                       |
           shell              system ground
             1                ground (for red)
             2                red analog video
             3                composite sync
             4               (not used)
             5                green analog video
             6                ground (for green)
             7                -5 V (not used)
             8                +12 V (not used)
             9                blue analog video
             10              (not used)
             11               audio output (not used)
             12               composite video (not used)
             13               ground (for blue)
             14              (not used)
             15              (not used)
     
     

    ___________________________
     

    .
    014 6502 Microprocessor Pinout
    A leading "~" indicates an active Low signal.
     

               Vss 1   |_|  40 ~RESET
               RDY 2        39 Phase 2 OUT
       Phase 1 OUT 3        38 SO
              ~IRQ 4        37 Phase 0 IN
              (NC) 5        36 (NC)
              ~NMI 6        35 (NC)
              SYNC 7        34 R/~W
               Vcc 8        33 D0
              A0   9        32 D1
              A1  10        31 D2
              A2  11        30 D3
              A3  12        29 D4
              A4  13        28 D5
              A5  14        27 D6
              A6  15        26 D7
              A7  16        25 A15
              A8  17        24 A14
              A9  18        23 A13
              A10 19        22 A12
              A11 20        21 Vss
     
     

    ___________________________
     
     

    .

    015 3.5" and 5.25" Drive cable pinouts.      .to.top
     

    Much of this information comes from page 90 of Open-Apple Volume 1,
    number 11 (1985).

    The following table lists all of the drive control signals for each type
    of controller card/disk port.

    signal       function            Unidisk   IIc    IIgs/IIc+    Disk ][

    GND      ground reference        1-4       1-4       1-3       1,3,5,7
    -12V     -12 volts DC            5         5         5         9

    +5V      +5 volts DC             6,16      6         6         11,12
    +12V     +12 volts DC            7,8       7,8       7,8       13,15,17,19
    WRPROT   write protect           10        10        10        20
    PH 0-3   stepper motor phases    11-14     11-14     11-14     2,4,6,8
    WREQ     write request           15        15        15        10
    DRVEN    drive enable            17 (9)    17        17 (9)    14
    RDDATA   read data               18        18        18        16
    WRDATA   write data              19        19        19        18
    EXTINT   external interrupt      -         9         -         -

    3.5DISK  Apple 3.5 drive enable  -         -         4         -

    HDSEL    3.5" drive head select  -         -         16        -

             not connected           -         16        -         -
     

    The UniDisk uses pin 9 to select the second drive.  Inside each UniDisk,
    the signal from pin 9 at the computer is connected to pin 17 of the daisy-
    chain drive connector.  When the computer selects drive 2 by activating
    pin 9, the first drive passes this through and the second drive sees its
    enable signal on pin 17.  Thus all drives are identical.

    The Disk ][ controller has two drive connectors, and the same pin (14) is
    used on each connector to select the appropriate drive.  This signal is
    the only difference between the connectors - all other signals are
    connected in parallel.

    Despite the IIgs having special functions for pins 4 and 16, they may be
    ignored when dealing with 5.25" drives, and treated as a UniDisk controller
    (i.e. connect pin 4 to ground, and pin 16 to +5V).  The Apple 3.5 drive
    disconnects these signals internally, so that they will not interfere with
    its operation.

    The UniDisk, IIc external drive and equivalents use a Dsub-19 connector,
    in which the pins are numbered along the connector, i.e.

    1    2    3    4    5    6    7    8    9    10
      11   12   13   14   15   16   17   18   19

    The Disk ][ uses an IDC-20 (20 pin insulation displacement connector) in
    which the pins are numbered in columns, i.e.

    2    4    6    8    10   12   14   16   18   20
    1    3    5    7    9    11   13   15   17   19

    The above numbering is from the back of the plug (where the ribbon cable
    connects to the plug).  If you are looking at the front of the plug (the
    socket side), reverse the rows in the above diagram (top row is 1, 3, ...)

    The pin numbering of the Dsub-19 connector does NOT correspond to the
    wire numbers in the cable.  Pin 1 of the cable goes to pin 1 of the
    connector, but pin 2 of the cable goes to pin 11 of the connector.
     

    ___________________________
     
     

    .

    016 Apple //c Dsub-15 Video Expansion Connector.      .to.top
     

    [Sorry, no cute diagram showing which pin is which]
     
     

     1- TEXT Video text signal from TMG; set to inverse of GR, except in
        double high-resolution mode.
     2- 14M 14M master timing signal from the system oscillator.
     3- SYNC* Displays horizontal and vertical synchronization signal from
        IOU pin 39.
     4- SEGB Displays vertical counter bit from IOU pin 4; in text mode,
        indicates second low-order vertical counter; in graphics mode,
        indicates low-resolution.
     5- 1VSOUND One-volt sound signal from pin 5 of the audio hybrid circuit
        (AUD).
     6- LDPS* Video shift-register load enable from pin 12 of TMG.
     7- WNDW* Active area display blanking; includes both horizontal and
        vertical blanking.
     8- +12V Regulated +12 volts DC; can drive 300mA.
     9- PRAS* RAM row-address strobe from TMG pin 19.
    10- GR Graphics mode enable from IOU pin 2.
    11- SEROUT* Serialized character generator output from pin 1 of the
        74LS166 shift register.
    12- NTSC Composite NTSC video signal from VID hybrid chip.
    13- GND Ground reference and supply.
    14- VIDD7 From 74LS374 video latch; causes half-dot shift high.
    15- CREF Color reference signal from TMG pin 3; 3.58 MHz.
     
     

    Note: The signals at the Dsub-15 on the Apple IIc are not the same as
    those at the Dsub-15 end of the Apple III, Apple IIGS, and Macintosh II.
    Do not attempt to plug a cable intended for one into the other.

    Several of these signals, such as the 14 MHz, must be buffered within
    about 4 inches of the back panel connector--preferably inside a
    container directly connected to the back panel.
     

    ___________________________
     
     

    .

    017 Apple //c External Power Connector.      .to.top
     

    From the Apple //c Technical Reference Manual

    Section 11.2.2 The External Power Connector
     

    The external power supply is attached to the internal converter by means
    of a 7-pin DIN connector. The connector pins are identified in Figure
    11-1 and Table 11-3.
     

    Figure 11-1  External Power Connector
    .     --+ +--       Pin#      Signal
    .   / 7 |_| 1 \     Pin 1     Not Connected
    .  | 6       2 |    Pin 2,3   Signal Ground
    .   \ 5  4  3 /     Pin 4     Shield Ground
    .    \_______/      Pin 5,6   +15 VDC
    .                   Pin 7     Not Connected

    Table 11-3   External Power Connector Signals

    Pin#    Name      Description
    1,7       --      Not Connected
    2,3     Ground    Common Electrical Ground
    4       Chassis   Chassis Ground
    5,6     +15       +15-volt DC input to converter
     

    ___________________________
     

    .
    018 Apple II/II+ Keyboard Socket Pinout.      .to.top

    This socket is located near the front of the
    motherboard.

             +---| |----+
        +5v  | 1     16 | NC
     Strobe  | 2     15 | -12v
     ~Reset  | 3     14 | NC
         NC  | 4     13 | Data 1
     Data 5  | 5     12 | Data 0
     Data 4  | 6     11 | Data 3
     Data 6  | 7     10 | Data 2
        Gnd  | 8      9 | NC
             +----------+

    Pin        Name    Description

    1          +5      +5 volt power supply.  Total current drain on this pin
                       must be less than 120mA.

    2          STROBE  Strobe output from keyboard.  This line should be given
                       a pulse at least 10 microsecond long each time a key is
                       pressed on the keyboard.  The strobe can be of either
                       polarity.
               _____                    _____
    3          RESET   Microprocessor's RESET line.  Normally high, this line
                       should be pulled low when the <RESET> key is pressed.

    4,9,16     NC      No connection.

    5-7,10-13  Data    Seven bit ASCII keyboard data input.

    8          Gnd     System electrical ground.

    15         -12v    -12 volt power supply.  Keyboard should draw less than
                       50mA.

    ___________________________
     
     

    .

    019 Apple //e Numeric Keypad matrix and connector.      .to.top
     

    The pins are numbered from 1 to 11, with pin 1 being the closest to the
    keyboard end of the computer (as far as I can tell). The pin functions
    are:

    1=Y0, 2=Y1, 3=Y3, 4=Y4, 5=Y2, 6=Y5, 7=no connection,
    8=X7, 9=X4, 10=X6, 11=X5.

    The X/Y pins refer to keyboard X/Y matrix signals.  Closing a specific X/Y
    pair is the equivalent of pressing the corresponding key on the keyboard.

    The matrix is as follows:

       X7 X6 X5 X4
    Y5  ,  +  7  3
    Y4 CR  .  6  2
    Y3  -  9  5  1
    Y2  (  8  4  0
    Y1                 (see below)
    Y0     *  )  /

    The Y1 row and Y0/X7 intersection vary depending on which keyboard ROM you
    have.

    The original IIe keyboard ROM (341-0132-B) has SPACE, RIGHT, ESC, LEFT,
    ?.  I get the impression that this ROM is rare.

    The revised IIe keyboard ROM (341-0132-C) has RIGHT, LEFT, UP, DOWN, ESC.
     
     

    ___________________________
     
     
     
     

    .

    020 Apple //e Numeric Keypad cable.      .to.top

    (This is from a Csa2 post by Mark Wade.)
     

    To construct a suitable internal cable for a IIe numeric
    keypad you need a female Dsub-15 to 11 pin female header.
    If the female Dsub-15 is numbered like this:

               Dsub-15 (female)
       ,--------------------------------.
       \ 08  07  06  05  04  03  02  01 /
        \  15  14  13  12  11  10  09  /
         `----------------------------'
     

    And the 11 pin header is numbered like this:

      _____________________________________
     |                                     |
     |  11  10  9  8  7  6  5  4  3  2  1  |
     |_____________________________________|
     

    Then:

    Dsub-15   |     Header
    __________|_____________

     12               11
     11               10
     10                9
      9                8
     NC                7
      7                6
      6                5
      5               4
      3                3
      2                2
      1                1

    The header is as viewed on the motherboard.  The Dsub-15 is the
    female connector that you would plug the keypad into.

    to.top