Dragon Socket Pinouts

Contents

• Pin numbering conventions
• Power supply connectors
• Composite video monitor socket
• RS232 Serial socket (Dragon 64 only)
• Joystick sockets
• Cassette recorder socket
• Parallel printer port
• Cartridge 40 way expansion socket
• Disk drive 34 way connector

Pin numbering conventions

All pinouts are shown as looking into the socket on the Dragon.

Composite video monitor socket

180° 5 pin DIN

      /    U    \
     (           )
     ( 3       1 )
     (  5     4  )
      \    2    /

  1  Sound
  2  Ground
  3  Video
  4  Not connected
  5  Not connected

Dragon 64 RS232 serial socket

7 pin DIN

      /    U    \
     (  7     6  )
     ( 3       1 )
     (  5     4  )
      \    2    /

  1  Ground
  2  Rx data
  3  +12V
  4  DTR
  5  CTS
  6  Tx data
  7  -12V

Joystick sockets

270° 5 pin DIN

      /    U    \
     (  5     1  )
     (           )
     (  4     2  )
      \    3    /

  1  X wiper
  2  Y wiper
  3  Ground
  4  Fire (pulled to ground)
  5  +5V

Cassette recorder socket

180° 5 pin DIN

      /    U    \
     (           )
     ( 3       1 )
     (  5     4  )
      \    2    /

  1  Remote control
  2  Ground
  3  Remote control
  4  Input from cassette (from EAR)
  5  Output from Dragon (to MIC)

Parallel Centronics printer port

20 way IDC socket

 19                  1
  . . . . . . . . . .
  . . . . . . . . . .
 20                  2

  1  Strobe      2  +5V
  3  Data 0      4  +5V
  5  Data 1      6  Ground
  7  Data 2      8  Ground
  9  Data 3     10  Ground
 11  Data 4     12  Ground
 13  Data 5     14  Ground
 15  Data 6     16  Ground
 17  Data 7     18  Ground
 19  !ACK       20  BUSY

Cartridge 40 way expansion socket

40 way expansion socket

 39                                      1
  . . . . . . . . . . . . . . . . . . . .
  . . . . . . . . . . . . . . . . . . . .
 40                                      2

       1  +12V           2  +12V
       3  !HALT          4  !NMI
       5  !RESET         6  E (main clock)
       7  Q (leads E)    8  CART (PIA1 CB1)
       9  +5V           10  D0
      11  D1            12  D2
      13  D3            14  D4
      15  D5            16  D6
      17  D7            18  R/!W
      19  A0            20  A1
      21  A2            22  A3 
      23  A4            24  A5 
      25  A6            26  A7    
      27  A8            28  A9    
      29  A10           30  A11   
      31  A12           32  !CTS ($C000-$FFEF)
      33  Ground        34  Ground
      35  Ext sound src 36  !P2 (PIA2 $FF40-$FF5F)
      37  A13           38  A14
      39  A15           40  !DSD (Device Select Disable)

Disk drive 34 way ribbon connector

34 way IDC socket

 33                                1
  . . . . . . . . . . . . . . . . .
  . . . . . . . . . . . . . . . . .
 34                                2

     1  Ground      2  O  Reserved (Density select)
     3  Ground      4  O  !Head Load
     5  Ground      6  O  !Drive Select #3
     7  Ground      8  I  !Index hole sensor
     9  Ground     10  O  !Drive Select #0
    11  Ground     12  O  !Drive Select #1
    13  Ground     14  O  !Drive Select #2
    15  Ground     16  O  !Motor On
    17  Ground     18  O  !Step In
    19  Ground     20  O  !Step Pulse
    21  Ground     22  O  !Write Data
    23  Ground     24  O  !Write Gate
    25  Ground     26  I  !Track 0 sensor
    27  Ground     28  I  !Write Protect sensor
    29  Ground     30  I  !Read Data
    31  Ground     32  O  !Side 1 Select
    33  Ground     34  I  !Drive Ready (Unused in Dragon cart.)

Last update: Wed, 14 May 1997 15:19:00 +0100 (BST)