
AMERICAN MEGATRENDS, INC.

ATLANTIS PENTIUM II

Device Type              Mainboard
Processor                Pentium II
Processor Speed          233/266/300/333MHz
Chip Set                 Intel
Video Chip Set           None
Maximum Onboard Memory   384MB (EDO & SDRAM supported)
Maximum Video Memory     None
Cache                    256/512KB (located on Pentium II CPU)
BIOS                     AMI
Dimensions               305mm x 244mm
I/O Options              32-bit PCI slots (5), 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
NPU Options              None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  AGP slot                 AGP         CPU fan power             C4

  ATX power                ATX         Parallel port             CN1
  connector

  Power LED &          C1/pins 1 - 5   Serial port               CN2
  keylock

  Turbo switch         C1/pins 6 & 7   Serial port               CN3

  Green PC connector   C1/pins 8 & 9   PS/2 mouse port           CN4

  Green PC LED         C1/pins 10 &    IDE interface 2           CN5
                            11

  Speaker              C1/pins 12 -    IDE interface 1           CN6
                            15

  IDE interface LED    C1/pins 16 &    Floppy drive              CN7
                            17         interface

  Soft off power       C1/pins 18 &    IR connector              IR1
  supply                    19

  Reset switch         C1/pins 20 &    32-bit PCI slots       PC1 - PC5
                            21

  Chassis fan power         C2         USB connector 1          USB1

  Chassis door              C3         USB connector 2          USB2
  connector

  Note: The location of the USB connectors is unidentified.

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            CPW              Open

      CMOS memory clear                       CPW             Closed

                    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

                  DIMM CONFIGURATION (CON'T)

      Size          Bank 0          Bank 1          Bank 2

      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

      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.

                            CPU SPEED SELECTION

    CPU      Clock    Multiplier    FREQ1     FREQ2     FREQ3      FREQ4
  speed     speed

  233MHz    66MHz        3.5x        Open      Open     Closed    Closed

  266MHz    66MHz         4x        Closed    Closed     Open     Closed

  300MHz    66MHz        4.5x        Open     Closed     Open     Closed

  333MHz    66MHz         5x        Closed     Open      Open     Closed

                     FLASH BIOS SELECTION

        Type                 EP1                  EP2

   MXIC MX28F2000P     Pins 1 & 2 closed   Pins 2 & 3 closed

   ATMEL AT29C020      Pins 2 & 3 closed   Pins 2 & 3 closed

     SST 29EE010       Pins 2 & 3 closed          Open

     SST 29EE020       Pins 2 & 3 closed   Pins 2 & 3 closed

    Intel 28F001       Pins 1 & 2 closed   Pins 1 & 2 closed

     AMD 29F002T       Pins 2 & 3 closed   Pins 2 & 3 closed

