DATAEXPERT CORPORATION

MEX8440-S

Device Type              Mainboard
Processor                Pentium II/Celeron
Processor Speed          233/266/300/333MHz
Chip Set                 Intel 440EX
Maximum Onboard Memory   256MB (EDO & SDRAM supported)
Audio Chip Set           CMI 8330DX
Cache                    0/128/256/512KB (located on the CPU)
BIOS                     Award
Dimensions               305mm x 170mm
I/O Options              32-bit PCI slots (3), floppy drive interface,
                         game/MIDI port, green PC connector, IDE
                         interfaces (2), parallel port, PS/2 mouse port,
                         serial ports (2), IR connector, USB connectors
                         (2), ATX power connector, AGP slot, line in, line
                         out, microphone in, audio in - CD-ROMs (2)

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  AGP slot                  AGP        Chassis fan power        FAN1

  ATX power connector       ATX        CPU fan power            FAN2

  Game/MIDI port            CN1        IR connector              IR1

  Microphone in             CN2        Audio in - CD-ROM         J1

  Line in                   CN3        Audio in - CD-ROM         J2

  Line out                  CN4        Power LED &          J8/pins 1 - 5
                                       keylock

  Serial port 2             CN5        IDE interface LED     J8/pins 6 &
                                                                 16

  Serial port 1             CN6        Green PC LED          J8/pins 7 &
                                                                 17

  Parallel port             CN7        Green PC connector    J8/pins 8 &
                                                                 18

  USB connector 1           CN8        Soft off power        J8/pins 9 &
                                       supply                    19

  USB connector 2           CN9        Reset switch          J8/pins 10 &
                                                                 20

  PS/2 mouse port          CN10        Speaker               J8/pins 11 -
                                                                 14

  IDE interface 2          CN11        Thermistor                RT1
                                       connector

  IDE interface 1          CN12        32-bit PCI slots       PC1 - PC3

  Floppy drive             CN13        5v power
  interface

              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

     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 EDO & SDRAM memory.

                            CACHE CONFIGURATION

  Note: 256KB/512KB cache is located on the Pentium II CPU. 128KB cache
  is located on the Celeron 300A & 333 CPU.

                            CPU SPEED SELECTION

  CPU speed    Clock speed    Multiplier      JP1        JP2       JP3

    233MHz        66MHz          3.5x        2 & 3      2 & 3     2 & 3

    266MHz        66MHz           4x         2 & 3      2 & 3     2 & 3

    300MHz        66MHz          4.5x        2 & 3      2 & 3     2 & 3

    333MHz        66MHz           5x         2 & 3      2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (CON'T)

    CPU      Clock    Multiplier     JP4A      JP4B      JP4C      JP4D
  speed     speed

  233MHz    66MHz        3.5x        Open      Open     Closed     Open

  266MHz    66MHz         4x        Closed    Closed     Open     Closed

  300MHz    66MHz        4.5x        Open     Closed     Open     Closed

  333MHz    66MHz         5x        Closed     Open      Open     Closed