DATAEXPERT CORPORATION
======================

   AIO4044

Device     Mainboard                                                           
Type       
Processor  CX486S/80486SX/80487SX/80486DX/80486DX2/80486DX4/P24T               
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz 
Speed      
Chip Set   OPTI                                                                
Video Chip Trident                                                             
Set        
Maximum    64MB                                                                
Onboard    
Memory     
Maximum    Unidentified                                                        
Video      
Memory     
Cache      128/512KB                                                           
BIOS       Award                                                               
Dimensions 188mm x 188mm                                                       
I/O        Floppy drive interface, IDE interface, parallel port, PS/2 mouse    
Options    port, serial ports (2), VGA feature connector, VGA port, riser slot 

<gopher://bitreich.org/I/th99/m/C-D/35717-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose            | Location | Purpose         | Location |
   |--------------------+----------+-----------------+----------|
   | VGA port           |   CN1    | PS/2 mouse port |   CN8    |
   |--------------------+----------+-----------------+----------|
   | Parallel port      |   CN2    | Power LED &     |    J2    |
   |                    |          | keylock         |          |
   |--------------------+----------+-----------------+----------|
   | Serial port 2      |   CN3    | Reset switch    |    J3    |
   |--------------------+----------+-----------------+----------|
   | Serial port 1      |   CN4    | Turbo LED       |    J4    |
   |--------------------+----------+-----------------+----------|
   | VGA feature        |   CN5    | Turbo switch    |    J5    |
   | connector          |          |                 |          |
   |--------------------+----------+-----------------+----------|
   | Floppy drive       |   CN6    | Speaker         |    J6    |
   | interface          |          |                 |          |
   |--------------------+----------+-----------------+----------|
   | IDE interface      |   CN7    | Riser slot      |   SL1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Label    |   Position   |
   |--------------------------------+------------+--------------|
   |>> | Factory configured - do    |     J1     | Unidentified |
   |   | not alter                  |            |              |
   |---+----------------------------+------------+--------------|
   |>> | Factory configured - do    |    JP2     | Unidentified |
   |   | not alter                  |            |              |
   |---+----------------------------+------------+--------------|
   |>> | Factory configured - do    |    JP5     | Unidentified |
   |   | not alter                  |            |              |
   |---+----------------------------+------------+--------------|
   |>> | VGA output select          |    JP6     |    Closed    |
   |   | interlaced                 |            |              |
   |---+----------------------------+------------+--------------|
   |   | VGA output select non      |    JP6     |     Open     |
   |   | interlaced                 |            |              |
   |---+----------------------------+------------+--------------|
   |>> | CPU clock speed select     |    JP10    |     Open     |
   |   | <33MHz                     |            |              |
   |---+----------------------------+------------+--------------|
   |   | CPU clock speed select     |    JP10    |    Closed    |
   |   | >33MHz                     |            |              |
   |---+----------------------------+------------+--------------|
   |>> | IDE interface enabled      | JP24/pins  |     Open     |
   |   |                            |   5 & 6    |              |
   |---+----------------------------+------------+--------------|
   |   | IDE interface disabled     | JP24/pins  |    Closed    |
   |   |                            |   5 & 6    |              |
   |---+----------------------------+------------+--------------|
   |>> | IDE select primary         | JP24/pins  |     Open     |
   |   |                            |   7 & 8    |              |
   |---+----------------------------+------------+--------------|
   |   | IDE select secondary       | JP24/pins7 |    Closed    |
   |   |                            |    & 8     |              |
   |---+----------------------------+------------+--------------|
   |>> | IDE read prefetch disabled | JP24/pins  |    Closed    |
   |   |                            |   9 & 10   |              |
   |---+----------------------------+------------+--------------|
   |   | IDE read prefetch enabled  | JP24/pins  |     Open     |
   |   |                            |   9 & 10   |              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SIMM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       2MB        |   (1) 512K x 36    |        None        |
   |------------------+--------------------+--------------------|
   |       4MB        |    (1) 1M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       4MB        |   (1) 512K x 36    |   (1) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       6MB        |    (1) 1M x 36     |   (1) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       8MB        |    (1) 2M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       8MB        |    (1) 1M x 36     |    (1) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       10MB       |    (1) 2M x 36     |   (1) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       12MB       |    (1) 2M x 36     |    (1) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       16MB       |    (1) 4M x 36     |        None        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SIMM CONFIGURATION (CON'T)                 |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       16MB       |    (1) 2M x 36     |    (1) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       18MB       |    (1) 4M x 36     |   (1) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       20MB       |    (1) 4M x 36     |    (1) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       24MB       |    (1) 4M x 36     |    (1) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (1) 8M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       36MB       |    (1) 8M x 36     |    (1) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       40MB       |    (1) 8M x 36     |    (1) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       48MB       |    (1) 8M x 36     |    (1) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (1) 8M x 36     |    (1) 8M x 36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |      128KB       |    (4) 32K x 8     |     (1) 8K x 8     |
   |------------------+--------------------+--------------------|
   |      512KB       |    (4) 128K x 8    |    (1) 32K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |       Size        |        JP28        |       JP29        |
   |-------------------+--------------------+-------------------|
   |       128KB       |        Open        |       Open        |
   |-------------------+--------------------+-------------------|
   |       512KB       |       Closed       |      Closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VIDEO MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   | Note: The size and location of the video memory is         |
   | unidentified.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |   Speed    |    JP13    |    JP14    |   JP15    |  JP16   |
   |------------+------------+------------+-----------+---------|
   |   25MHz    |   Closed   |   Closed   |  Closed   |  Open   |
   |------------+------------+------------+-----------+---------|
   |   33MHz    |   Closed   |   Closed   |   Open    |  Open   |
   |------------+------------+------------+-----------+---------|
   |   40MHz    |    Open    |   Closed   |   Open    |  Open   |
   |------------+------------+------------+-----------+---------|
   |   50iMHz   |   Closed   |   Closed   |  Closed   |  Open   |
   |------------+------------+------------+-----------+---------|
   |   50MHz    |   Closed   |    Open    |   Open    |  Open   |
   |------------+------------+------------+-----------+---------|
   |   66iMHz   |   Closed   |   Closed   |   Open    |  Open   |
   |------------+------------+------------+-----------+---------|
   |   75iMHz   |   Closed   |   Closed   |  Closed   |  Open   |
   |------------+------------+------------+-----------+---------|
   |  100iMHz   |   Closed   |   Closed   |   Open    |  Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |    Type    |           JP25           |        JP26        |
   |------------+--------------------------+--------------------|
   |   CX486S   |    Pins 2 & 3 closed     |        Open        |
   |------------+--------------------------+--------------------|
   |  80486SX   |    Pins 2 & 3 closed     |        Open        |
   |------------+--------------------------+--------------------|
   |  80487SX   | Pins 1 & 2, 3 & 4 closed | Pins 2 & 3 closed  |
   |------------+--------------------------+--------------------|
   |  80486DX   | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed  |
   |------------+--------------------------+--------------------|
   |  80486DX4  | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed  |
   |------------+--------------------------+--------------------|
   |    P24T    | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU MULTIPLIER SELECTION                  |
   |------------------------------------------------------------|
   |         Multiplier         |             JP22              |
   |----------------------------+-------------------------------|
   |             2x             |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            2.5x            |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |             3x             |             Open              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU VOLTAGE SELECTION                    |
   |------------------------------------------------------------|
   |          Voltage           |             JP27              |
   |----------------------------+-------------------------------|
   |            3.3v            |   Pins 2 & 3, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |             5v             |   Pins 1 & 2, 4 & 5 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       VGA SELECTION                        |
   |------------------------------------------------------------|
   |     Setting      |        JP3         |        JP8         |
   |------------------+--------------------+--------------------|
   |>> |   Enabled    | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     IDE MODE SELECTION                     |
   |------------------------------------------------------------|
   |       Mode       |  JP24/pins 1 & 2   |  JP24/pins 3 & 4   |
   |------------------+--------------------+--------------------|
   |>> |      0       |       Closed       |       Closed       |
   |---+--------------+--------------------+--------------------|
   |   |      1       |        Open        |       Closed       |
   |---+--------------+--------------------+--------------------|
   |   |      2       |       Closed       |        Open        |
   |---+--------------+--------------------+--------------------|
   |   |      3       |        Open        |        Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  IDE FREQUENCY SELECTION                   |
   |------------------------------------------------------------|
   |    Frequency     | JP24/pins 11 & 12  | JP24/pins 13 & 14  |
   |------------------+--------------------+--------------------|
   |   |    25MHz     |        Open        |        Open        |
   |---+--------------+--------------------+--------------------|
   |>> |    33MHz     |       Closed       |        Open        |
   |---+--------------+--------------------+--------------------|
   |   |    40MHz     |        Open        |       Closed       |
   |---+--------------+--------------------+--------------------|
   |   |    50MHz     |       Closed       |       Closed       |
   +------------------------------------------------------------+