AXIOM TECHNOLOGY, INC.

SBC8251

Processor           Cyrix/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      Chips and Technology
Maximum Onboard     64MB
Memory
Maximum Video       2MB
Memory
Cache               256/512KB
BIOS                Unidentified
Dimensions          185mm x 122mm
I/O Options         Floppy drive interface, IDE interface, parallel port,
                    PS/2 mouse port, PS/2 mouse interface, serial ports
                    (2), VGA port, PC/104 connectors (2)
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                Location

  PS/2 mouse port          CN1        Internal buzzer     JP12/pins 1- 3

  VGA port                 CN2        Power LED &          JP12/pins 2 -
                                      keylock                   10

  Serial port 1            CN3        External speaker    JP12/pins 4 - 7

  Parallel port            CN4        Green PC            JP12/pins 5 & 9
                                      connector

  Floppy drive             CN5        Reset switch         JP12/pins 11 &
  interface                                                     12

  IDE interface            CN6        IDE interface LED    JP12/pins 17 &
                                                                18

  Serial port 2            CN7        Watchdog timer       JP3/pins 19 &
                                                                20

  Power connector          J1         PC/104 connector          P1

  Power connector          J3         PC/104 connector          P2

  Keyboard, PS/2           J4
  mouse

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   Factory configured - do not           J2           Unidentified
      alter

  »   SHFCLK normal operation               JP5        Pins 2 & 3 closed

      SHFCLK inverted                       JP5        Pins 1 & 2 closed

      Flash BIOS write protect              JP7        Pins 1 & 2 closed
      disabled

      Flash BIOS write protect              JP7        Pins 2 & 3 closed
      enabled

  »   CMOS memory normal operation          JP8        Pins 2 & 3 closed

      CMOS memory clear                     JP8        Pins 1 & 2 closed

      Cache type select write back         JP10        Pins 2 & 3 closed

      Cache type select write              JP10        Pins 1 & 2 closed
      through

      System clock = PCI clock/4           JP13              Open

      System clock = PCI clock/3           JP13             Closed

      SIMM CONFIGURATION

     Size          Bank 0

      8MB       (2) 1M x 36

     16MB       (2) 2M x 36

     32MB       (2) 4M x 36

     64MB       (2) 8M x 36

   SIMM REFRESH RATE CONFIGURATION

      Setting       JP16/pins 1 & 2

       60MHz             Closed

       66MHz              Open

                 CACHE CONFIGURATION

  Note: The location of the cache is unidentified.

        CACHE JUMPER CONFIGURATION

        Size                 JP16

        256KB         Pins 3 & 4 closed

        512KB         Pins 5 & 6 closed

                 VIDEO MEMORY CONFIGURATION

  Note: The location of the video memory is unidentified.

                CPU BUS SPEED SELECTION

           Speed                       JP18

           50MHz             Pins 1 & 2, 3 & 4 closed

           55MHz                       Open

           60MHz                 Pins 3 & 4 closed

           66MHz                 Pins 1 & 2 closed

                  CPU BUS/CORE SELECTION

          Bus/Core                       JP16

             2/5              Pins 7 & 8, 9 & 10 closed

             1/3                  Pins 9 & 10 closed

             1/2                   Pins 7 & 8closed

             2/3                         Open

            CPU TYPE SELECTION

        Type                 JP9

        Cyrix         Pins 1 & 2 closed

        Intel         Pins 2 & 3 closed

      CPU VOLTAGE SELECTION (SINGLE)

       Voltage               JP1

        3.3v          Pins 1 & 2 closed

        3.6v          Pins 2 & 3 closed

       CPU VOLTAGE SELECTION (DUAL)

       Voltage               JP2

        2.7v          Pins 4 & 6 closed

        2.9v          Pins 2 & 4 closed

        3.3v          Pins 1 & 3 closed

        3.45v         Pins 3 & 5 closed

                          SERIAL PORT 2 SELECTION

          Setting                   JP11                    JP17

           RS232                    5 & 6           3 & 5, 4 & 6, 9 & 11,
                                                           10 & 12

           RS422                    3 & 4            1 & 3, 2 & 4, 7 & 9,
                                                           8 & 10

           RS485                    1 & 2            1 & 3, 2 & 4, 7 & 9,
                                                           8 & 10

  Note: Pins designated should be in the closed position.

                LCD PANEL INTERFACE SELECTION

       Setting               JP6                  JP15

     3.3v panel             Closed         Pins 1 & 2 closed

      5v panel               Open          Pins 2 & 3 closed

                         LCD PANEL TYPE SELECTION

  Note: Pins 9 & 10, 11 & 12, 13 & 14, 15 & 16 on JP3 are used to select
  up to 16 typed of LED BIOS.

      DISK ON CHIP ADDRESS SELECTION

       Setting               JP3

    C0000 – C7FFF     Pins 1 & 2 closed

    C8000 – CFFFF     Pins 3 & 4 closed

    D0000 – D7FFF     Pins 5 & 6 closed

    D8000 – DFFFF     Pins 7 & 8 closed