
DATAEXPERT CORPORATION

AIO8554

Device Type              Mainboard
Processor                Pentium
Processor Speed          75/90/100/120/133MHz
Chip Set                 Unidentified
Video Chip Set           Unidentified
Maximum Onboard Memory   128MB
Maximum Video Memory     2MB
Cache                    256/512KB
BIOS                     AMI
Dimensions               330mm x 210mm
I/O Options              Floppy drive interface, green PC connector, IDE
                         interfaces (2), parallel port, PS/2 mouse port,
                         serial ports (2), VGA feature connector, VGA port,
                         riser slot, wavetable connector, audio in 
                         CD-ROMs (3), MIDI connector

[Image]

                                CONNECTIONS

  Purpose              Location     Purpose                    Location

  Serial port 1           J1        Audio in  CD-ROM             J14
                                    (Panasonic)

  Serial port 2           J2        Audio in  CD-ROM             J15
                                    (Sony)

  Parallel port           J3        Audio in                     J16
                                    CD-ROM(Mitsumi)

  VGA port                J4        Reset switch                  J17

  External battery        J6        Turbo LED                     J18

  VGA feature             J7        Turbo switch                  J19
  connector

  IDE interface 1         J8        Speaker                       J20

  IDE interface 2         J9        Power LED & keylock           J21

  IDE interface LED       J10       Green PC connector           JP18

  IDE interface LED       J11       MIDI connector               JP38

  Floppy drive            J12       PS/2 mouse port               M1
  interface

  Wavetable               J13       Riser slot                    SL1
  connector

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP11          Pins 2 & 3
                                                              closed

      CMOS memory clear                       JP11          Pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP12             Open
      (12887A clock only)

      CMOS memory clear (12887A clock         JP12            Closed
      only)

      Printer mode select standard            JP15            Closed

      Printer mode select EPP/ECP             JP15             Open

      Feature function disabled               JP40             Open

      Feature function enabled                JP40            Closed

                SIMM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

       4MB        (2) 256K x 36    (2) 256K x 36

       6MB        (2) 512K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB         (2) 1M x 36     (2) 256K x 36

      12MB        (2) 512K x 36     (2) 1M x 36

            SIMM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1

      16MB         (2) 2M x 36          None

      16MB         (2) 1M x 36      (2) 1M x 36

      18MB         (2) 2M x 36     (2) 256K x 36

      20MB        (2) 512K x 36     (2) 2M x 36

      24MB         (2) 2M x 36      (2) 1M x 36

      32MB         (2) 4M x 36          None

      32MB         (2) 2M x 36      (2) 2M x 36

      34MB         (2) 4M x 36     (2) 256K x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 4M x 36      (2) 1M x 36

      48MB         (2) 2M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      66MB         (2) 8M x 36     (2) 256K x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 8M x 36      (2) 1M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      96MB         (2) 8M x 36      (2) 4M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

                            CACHE CONFIGURATION

     Size         Bank 0       Bank 1      Bank 2             TAG

  256KB (A)        None         None      (2) 32K x      Unidentified
                                             36

  256KB (B)      (2) 32K x      None        None       (1) 8K/16K/32K x 8
                    32

    512KB        (2) 32K x    (2) 32K x     None        (1) 16K/32K x 8
                    32           32

                  CACHE JUMPER CONFIGURATION

        Size                 JP22                 JP31

      256KB (B)              Open          Pins 1 & 2 closed

        512KB               Closed         Pins 2 & 3 closed

            VIDEO MEMORY CONFIGURATION

  Note: The video chips sizes are unidentified.

                            CPU SPEED SELECTION

    CPU      Clock    Multiplier      JP24      JP27      JP29      JP30
  speed      speed

  75MHz      50MHz       1.5x         Open      Open      Open      Open

  90MHz      60MHz       1.5x        Closed     Open      Open      Open

  100MHz     66MHz       1.5x        Closed    Closed     Open      Open

  120MHz     60MHz        2x         Closed     Open     Closed     Open

  133MHz     66MHz        2x         Closed    Closed    Closed     Open

                    DMA CHANNEL SELECTION

       Channel               JP13                 JP14

          1            Pins 1 & 2 closed   Pins 1 & 2 closed

          3            Pins 2 & 3 closed   Pins 2 & 3 closed

