DATAEXPERT CORPORATION

MGX7520 (SLIM)

Device Type                Mainboard
Processor                  Cyrix GXM
Processor Speed            Unidentified
Chip Set                   Cyrix CX5520
Maximum Onboard Memory     256MB (SDRAM supported)
Video Chip Set             Cyrix (integrated)
Audio Chip Set             Cyrix (integrated)
Maximum Video Memory       Unidentified
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

[Image]

                                CONNECTIONS

  Purpose               Location       Purpose                Location

  ATX power                ATX         Chassis fan power        FAN
  connector

  ATX-P connector         ATXP         IR connector             IR1

  Parallel port            CN1         Audio in - CD-ROM         J8

  PS/2 mouse port          CN2         Audio in - CD-ROM         J9

  Serial port 2            CN3         Power LED &         JP7/pins 1 - 5
                                       keylock

  Serial port 1            CN4         Green PC LED        JP7/pins 8 & 9

  Floppy drive             CN5         Soft off power       JP7/pins 10 &
  interface                            supply                    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 LED    JP7/pins 20 &
                                                                 21

  MIDI/TV out              CN9         Green PC connector   JP7/pins 22 &
  connector                                                      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