Apple III+: External Drive Adapter Pin Configuration (10/94)

     Apple III+       Disk
     (DB-25)          (26 Pin)
 
        1               13,15,17,19
        2               1,3,5,7
        3               16
        4               1,3,5,7
        5               10
        6               18
        7               11,12
        8               22
        9               1,3,5,7
        10              1,3,5,7
        11              14
        12              20
        13              NC
        14              26
        15              2
        16              4
        17              6
        18              8
        19              13,15,17,19
        20              13,15,17,19
        21              23
        22              21
        23              9
        24              11,12
        25              24
 
-->DB-25:
     Viewing the adapter from the AIII+, Pin 13 should be removed to    
     prevent damage to the Apple III+.
 
                1  2  3  4  .. .. .. .. 12  13
                 14 15 16 .. .. .. .. 24  25
 
-->26 Pin:
     Viewing the adapter from the drive:
 
                25 23 21 19 . . . 5 3 1
                26 24 22 20 . . . 6 4 2


Article Change History:
18 Oct 1994 - Reviewed for technical accuracy, revised formatting.


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