BOCA RESEARCH, INC.
===================

   DELL V486DX/XX REV. 1 I/O CARD

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 16-bit, ISA                            |
   |-------------------+----------------------------------------|
   | Size:             | Half-length, full-height card          |
   |-------------------+----------------------------------------|
   | Hard drive        | Two IDE (AT) Interface drives          |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, or 1.44MB     |
   | supported:        | drives                                 |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/A-B/20550-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                    |  Location  |
   |-----------------------------------------------+------------|
   | 25-pin parallel port                          |    CN1     |
   |-----------------------------------------------+------------|
   | 10-pin serial port - external                 |    CN2     |
   |-----------------------------------------------+------------|
   | 10-pin serial port - internal                 |     J3     |
   |-----------------------------------------------+------------|
   | 40-pin IDE(AT) interface connector            |     J4     |
   |-----------------------------------------------+------------|
   | 34-pin control cable connector - floppy drive |     J5     |
   |-----------------------------------------------+------------|
   | 4-pin connector - drive active LED            |     J6     |
   |-----------------------------------------------+------------|
   | Game port                                     |     J8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             | Location |   Setting    |
   |----------------------------------+----------+--------------|
   |>> | IDE(AT) port (J2) enabled    |    J7    | pins 14 & 16 |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | IDE(AT) port (J2) disabled   |    J7    | pins 16 & 18 |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |>> | Control cable connector -    |    J7    | pins 20 & 22 |
   |   | floppy drive (J1) enabled    |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | Control cable connector -    |    J7    | pins 22 & 24 |
   |   | floppy drive (J1) disabled   |          |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 (CN2) CONFIGURATION              |
   |------------------------------------------------------------|
   |        COM/Address         |              J7               |
   |----------------------------+-------------------------------|
   |>> |       COM1/3F8h        |   pins 1 & 3, 7 & 9 closed    |
   |---+------------------------+-------------------------------|
   |   |       COM3/3E8h        |   pins 1 & 3, 9 & 11 closed   |
   |---+------------------------+-------------------------------|
   |   |        Disabled        |       pins 3 & 5 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 (J3) CONFIGURATION              |
   |------------------------------------------------------------|
   |        COM/Address         |              J7               |
   |----------------------------+-------------------------------|
   |>> |       COM2/2F8h        |   pins 2 & 4, 8 & 10 closed   |
   |---+------------------------+-------------------------------|
   |   |       COM4/2E8h        |  pins 2 & 4, 10 & 12 closed   |
   |---+------------------------+-------------------------------|
   |   |        Disabled        |       pins 4 & 6 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT (CN1) CONFIGURATION              |
   |------------------------------------------------------------|
   |        LPT/Address         |              J7               |
   |----------------------------+-------------------------------|
   |>> |       LPT1/278h        | pins 13 & 15, 19 & 21 closed  |
   |---+------------------------+-------------------------------|
   |   |       LPT2/378h        | pins 13 & 15, 21 & 23 closed  |
   |---+------------------------+-------------------------------|
   |   |        Disabled        |      pins 15 & 17 closed      |
   +------------------------------------------------------------+