
DATAEXPERT CORPORATION

MBX8440-OS

Device Type          Mainboard
Processor            Pentium II/Celeron/Mendocino
Processor Speed      233/266/300/333/350/400/450MHz
Chip Set             Intel 440BX
Maximum Onboard      384MB (EDO & SDRAM supported)
Memory
Audio Chip Set       Yamaha
Cache                0/128/256/512KB (located on the CPU)
BIOS                 Award
Dimensions           305mm x 180mm
I/O Options          32-bit PCI slots (4), floppy drive interface, 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                ATX        CPU fan power             FAN2
  connector

  Game/MIDI port           CN1        IR connector               J1

  Microphone in            CN2        Audio in - CD-ROM          J2
                                      (Sony)

  Line in                  CN3        Audio in - CD-ROM          J3
                                      (Panasonic)

  Line out                 CN4        Power LED & keylock   J5/pins 1 - 5

  Serial port 2            CN5        IDE interface LED      J5/pins 6 &
                                                                 16

  Serial port 1            CN6        Green PC LED           J5/pins 7 &
                                                                 17

  Parallel port            CN7        Green PC connector     J5/pins 8 &
                                                                 18

  USB connector 1          CN8        Soft off power         J5/pins 9 &
                                      supply                     19

  USB connector 2          CN9        Reset switch           J5/pins 10 &
                                                                 20

  PS/2 mouse port         CN10        Speaker                J5/pins 11 -
                                                                 14

  IDE interface 2         CN11        Wake on LAN                JS1
                                      connector

  IDE interface 1         CN12        Thermistor                 RT1
                                      connector

  Floppy drive            CN13        32-bit PCI slots        PC1 - PC4
  interface

                    DIMM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2

      8MB       (1) 1M x 64        None          None

     16MB       (1) 2M x 64        None          None

     16MB       (1) 1M x 64    (1) 1M x 64       None

     24MB       (1) 2M x 64    (1) 1M x 64       None

     24MB       (1) 1M x 64    (1) 1M x 64    (1) 1M x 64

     32MB       (1) 4M x 64        None          None

     32MB       (1) 2M x 64    (1) 1M x 64    (1) 1M x 64

     32MB       (1) 2M x 64    (1) 2M x 64       None

     40MB       (1) 4M x 64    (1) 1M x 64       None

     40MB       (1) 2M x 64    (1) 2M x 64    (1) 1M x 64

     48MB       (1) 4M x 64    (1) 1M x 64    (1) 1M x 64

     48MB       (1) 4M x 64    (1) 2M x 64       None

     48MB       (1) 2M x 64    (1) 2M x 64    (1) 2M x 64

     56MB       (1) 4M x 64    (1) 2M x 64    (1) 1M x 64

     64MB       (1) 8M x 64        None          None

     64MB       (1) 4M x 64    (1) 2M x 64    (1) 2M x 64

     64MB       (1) 4M x 64    (1) 4M x 64       None

     72MB       (1) 8M x 64    (1) 1M x 64       None

     72MB       (1) 4M x 64    (1) 4M x 64    (1) 1M x 64

     80MB       (1) 8M x 64    (1) 1M x 64    (1) 1M x 64

                  DIMM CONFIGURATION (CON'T)

      Size          Bank 0          Bank 1          Bank 2

      80MB        (1) 8M x 64     (1) 2M x 64        None

      80MB        (1) 4M x 64     (1) 4M x 64    (1) 2M x 64

      88MB        (1) 8M x 64     (1) 2M x 64    (1) 1M x 64

      96MB        (1) 8M x 64     (1) 2M x 64    (1) 2M x 64

      96MB        (1) 8M x 64     (1) 4M x 64        None

      96MB        (1) 4M x 64     (1) 4M x 64    (1) 4M x 64

     104MB        (1) 8M x 64     (1) 4M x 64    (1) 1M x 64

     112MB        (1) 8M x 64     (1) 4M x 64    (1) 2M x 64

     128MB       (1) 16M x 64        None            None

     128MB        (1) 8M x 64     (1) 4M x 64    (1) 4M x 64

     128MB        (1) 8M x 64     (1) 8M x 64        None

     136MB       (1) 16M x 64     (1) 1M x 64        None

     136MB        (1) 8M x 64     (1) 8M x 64    (1) 1M x 64

     144MB       (1) 16M x 64     (1) 1M x 64    (1) 1M x 64

     144MB       (1) 16M x 64     (1) 2M x 64        None

     144MB        (1) 8M x 64     (1) 8M x 64    (1) 2M x 64

     152MB       (1) 16M x 64     (1) 2M x 64    (1) 1M x 64

     160MB       (1) 16M x 64     (1) 2M x 64    (1) 2M x 64

     160MB       (1) 16M x 64     (1) 4M x 64        None

     160MB        (1) 8M x 64     (1) 8M x 64    (1) 4M x 64

     168MB       (1) 16M x 64     (1) 4M x 64    (1) 1M x 64

     176MB       (1) 16M x 64     (1) 4M x 64    (1) 2M x 64

     192MB       (1) 16M x 64     (1) 4M x 64    (1) 4M x 64

     192MB       (1) 16M x 64     (1) 8M x 64        None

     192MB        (1) 8M x 64     (1) 8M x 64    (1) 8M x 64

     200MB       (1) 16M x 64     (1) 8M x 64    (1) 1M x 64

     208MB       (1) 16M x 64     (1) 8M x 64    (1) 2M x 64

     224MB       (1) 16M x 64     (1) 8M x 64    (1) 4M x 64

     256MB       (1) 16M x 64     (1) 8M x 64    (1) 8M x 64

     384MB       (1) 16M x 64    (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     Clock    Multiplier   JP2    JP1A     JP1B     JP1C     JP1D
  speed    speed

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

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

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

  300MHz   100MHz       3x       1 &   Closed    Open     Closed   Open
                                  2

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

  350MHz   100MHz      3.5x      1 &    Open     Open     Closed   Open
                                  2

  400MHz   100MHz       4x       1 &   Closed   Closed    Open     Closed
                                  2

  450MHz   100MHz      4.5x      1 &    Open    Closed    Open     Closed
                                  2

  Note: Pins designated should be in the closed position.

