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

   MGX7520 (SLIM)

   Device Type      Mainboard                                     
   Processor        Cyrix GXM                                     
   Processor Speed  Unidentified                                  
   Chip Set         Cyrix CX5520                                  
   Maximum Onboard  256MB (SDRAM supported)                       
   Memory           
   Video Chip Set   Cyrix (integrated)                            
   Audio Chip Set   Cyrix (integrated)                            
   Maximum Video    Unidentified                                  
   Memory           
   Cache            None                                          
   BIOS             Award                                         
   Dimensions       220mm x 220mm                                 
   I/O Options      Floppy drive interface, game interface, green 
                    PC connector, IDE interfaces (2), parallel    
                    port, PS/2 mouse port, serial ports (2), ATX  
                    power connector, MIDI/TV out connector, audio 
                    in - CD-ROMs (2), soft off power supply       

<gopher://bitreich.org/I/th99/m/C-D/35843-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose        |  Location  |
   |-------------------+----------+----------------+------------|
   | ATX power         |   ATX    | Chassis fan    |    FAN     |
   | connector         |          | power          |            |
   |-------------------+----------+----------------+------------|
   | ATX-P connector   |   ATXP   | IR connector   |    IR1     |
   |-------------------+----------+----------------+------------|
   | Parallel port     |   CN1    | Audio in -     |     J8     |
   |                   |          | CD-ROM         |            |
   |-------------------+----------+----------------+------------|
   | PS/2 mouse port   |   CN2    | Audio in -     |     J9     |
   |                   |          | CD-ROM         |            |
   |-------------------+----------+----------------+------------|
   | Serial port 2     |   CN3    | Power LED &    | JP7/pins 1 |
   |                   |          | keylock        |    - 5     |
   |-------------------+----------+----------------+------------|
   | Serial port 1     |   CN4    | Green PC LED   | JP7/pins 8 |
   |                   |          |                |    & 9     |
   |-------------------+----------+----------------+------------|
   | Floppy drive      |   CN5    | Soft off power |  JP7/pins  |
   | interface         |          | supply         |  10 & 11   |
   |-------------------+----------+----------------+------------|
   | IDE interface 2   |   CN6    | Reset switch   |  JP7/pins  |
   |                   |          |                |  12 & 24   |
   |-------------------+----------+----------------+------------|
   | IDE interface 1   |   CN7    | Speaker        |  JP7/pins  |
   |                   |          |                |  13 - 16   |
   |-------------------+----------+----------------+------------|
   | Game interface    |   CN8    | IDE interface  |  JP7/pins  |
   |                   |          | LED            |  20 & 21   |
   |-------------------+----------+----------------+------------|
   | MIDI/TV out       |   CN9    | Green PC       |  JP7/pins  |
   | connector         |          | connector      |  22 & 23   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Label |   Position   |
   |-------------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J1   | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | CMOS memory normal operation    | JP13  |  Pins 1 & 2  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | CMOS memory clear               | JP13  |  Pins 2 & 3  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     | JP14  | Unidentified |
   |   | alter                           |       |              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIMM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       8MB        |    (1) 1M x 64     |        None        |
   |------------------+--------------------+--------------------|
   |       16MB       |    (1) 2M x 64     |        None        |
   |------------------+--------------------+--------------------|
   |       16MB       |    (1) 1M x 64     |    (1) 1M x 64     |
   |------------------+--------------------+--------------------|
   |       24MB       |    (1) 2M x 64     |    (1) 1M x 64     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (1) 4M x 64     |        None        |
   |------------------+--------------------+--------------------|
   |       32MB       |    (1) 2M x 64     |    (1) 2M x 64     |
   |------------------+--------------------+--------------------|
   |       40MB       |    (1) 4M x 64     |    (1) 1M x 64     |
   |------------------+--------------------+--------------------|
   |       48MB       |    (1) 4M x 64     |    (1) 2M x 64     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (1) 8M x 64     |        None        |
   |------------------+--------------------+--------------------|
   |       64MB       |    (1) 4M x 64     |    (1) 4M x 64     |
   |------------------+--------------------+--------------------|
   |       72MB       |    (1) 8M x 64     |    (1) 1M x 64     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (1) 8M x 64     |    (1) 2M x 64     |
   |------------------+--------------------+--------------------|
   |       96MB       |    (1) 8M x 64     |    (1) 4M x 64     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DIMM CONFIGURATION (CON'T)                 |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |      128MB       |    (1) 16M x 64    |        None        |
   |------------------+--------------------+--------------------|
   |      128MB       |    (1) 8M x 64     |    (1) 8M x 64     |
   |------------------+--------------------+--------------------|
   |      136MB       |    (1) 16M x 64    |    (1) 1M x 64     |
   |------------------+--------------------+--------------------|
   |      144MB       |    (1) 16M x 64    |    (1) 2M x 64     |
   |------------------+--------------------+--------------------|
   |      160MB       |    (1) 16M x 64    |    (1) 4M x 64     |
   |------------------+--------------------+--------------------|
   |      192MB       |    (1) 16M x 64    |    (1) 8M x 64     |
   |------------------+--------------------+--------------------|
   |      256MB       |    (1) 16M x 64    |    (1) 16M x 64    |
   |------------------------------------------------------------|
   |      Note: Board accepts SDRAM memory.                     |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |             CPU INTERNAL CLOCK SPEED SELECTION             |
   |------------------------------------------------------------|
   |           Speed            |              JP1              |
   |----------------------------+-------------------------------|
   |             6x             |   Pins 1 & 3, 4 & 6 closed    |
   |----------------------------+-------------------------------|
   |             7x             |   Pins 2 & 4, 3 & 5 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |           Speed            |              JP4              |
   |----------------------------+-------------------------------|
   |           30MHz            |   Pins 3 & 5, 4 & 6 closed    |
   |----------------------------+-------------------------------|
   |           33MHz            |   Pins 1 & 3, 4 & 6 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU VOLTAGE SELECTION                    |
   |------------------------------------------------------------|
   |    Voltage     |     V core     |           JP2            |
   |----------------+----------------+--------------------------|
   |      3.3v      |   2.9v/3.6v    | Pins 1 & 2, 4 & 5 closed |
   |----------------+----------------+--------------------------|
   |   2.9v/3.6v    |   2.9v/3.6v    | Pins 2 & 3, 5 & 6 closed |
   +------------------------------------------------------------+