
ACER, INC.

ACERALTOS 900 PRO (M11A), M11A

Device Type                Mainboard
Processor                  Pentium Pro
Processor Speed            180/200MHz
Chip Set                   Unidentified
Maximum Onboard Memory     384MB (EDO supported)
Cache                      256/512KB (located on Pentium Pro CPU)
Dimensions                 330mm x 218mm
I/O Options                32-bit PCI slots (4), floppy drive interface,
                           IDE interfaces (2), SCSI interface, Wide Ultra
                           SCSI interface, parallel port, PS/2 mouse port,
                           serial ports (2), VRM connector

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  Serial port 1            CN1        Power LED & keylock        CN16

  Serial port 2            CN2        Reset switch/RDM           CN17
                                      cable connector

  Parallel port            CN3        IDE interface LED          CN18

  Floppy drive             CN5        CPU fan power              FA1
  interface

  IDE interface 1          CN6        VRM connector               J7

  IDE interface 2          CN7        Wide SCSI interface         J8

  RDM connector            CN8        SCSI interface             J12

  RDM connector            CN9        PS/2 mouse port            MS1

  Speaker                  CN15       32-bit PCI slots        PC1 - PC4

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not          CN10          Unidentified
      alter

     Factory configured - do not          CN11          Unidentified
      alter

     Factory configured - do not          CN12          Unidentified
      alter

     Factory configured - do not          CNN1          Unidentified
      alter

     Factory configured - do not           FA2          Unidentified
      alter

     Factory configured - do not           FA3          Unidentified
      alter

     Factory configured - do not           FA4          Unidentified
      alter

     BIOS type select Acer                 J4         Pins 1 & 2 closed

      BIOS type select OEM                  J4         Pins 2 & 3 closed

     Password enabled                      J5         Pins 1 & 2 closed

      Password disabled                     J5         Pins 2 & 3 closed

     SCSI type select wide                 J6              Closed

      SCSI type select narrow               J6               Open

     Buzzer enabled                        J13        Pins 1 & 2 closed

      External speaker enabled              J13        Pins 2 & 3 closed

     Reset switch enabled                 JMP1        Pins 1 & 2 closed

      Reset switch disabled, Green         JMP1        Pins 2 & 3 closed
      PC enabled

                    SIMM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2

      8MB       (2) 1M x 36        None          None

     16MB       (2) 1M x 36    (2) 1M x 36       None

     16MB       (2) 2M x 36        None          None

     24MB       (2) 2M x 36    (2) 1M x 36       None

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

     32MB       (2) 4M x 36        None          None

     32MB       (2) 2M x 36    (2) 2M x 36       None

     40MB       (2) 4M x 36    (2) 1M x 36       None

                  SIMM CONFIGURATION (CON'T)

      Size          Bank 0          Bank 1          Bank 2

      48MB        (2) 4M x 36     (2) 2M x 36        None

      48MB        (2) 4M x 36     (2) 1M x 36    (2) 1M x 36

      56MB        (2) 4M x 36     (2) 2M x 36    (2) 1M x 36

      64MB        (2) 8M x 36        None            None

      64MB        (2) 4M x 36     (2) 4M x 36        None

      80MB        (2) 8M x 36     (2) 2M x 36        None

      80MB        (2) 8M x 36     (2) 1M x 36    (2) 1M x 36

      88MB        (2) 8M x 36     (2) 2M x 36    (2) 1M x 36

      96MB        (2) 8M x 36     (2) 4M x 36        None

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

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

     104MB        (2) 8M x 36     (2) 4M x 36    (2) 1M x 36

     112MB        (2) 8M x 36     (2) 4M x 36    (2) 2M x 36

     128MB        (2) 8M x 36     (2) 4M x 36    (2) 4M x 36

     128MB       (2) 16M x 36        None            None

     128MB        (2) 8M x 36     (2) 8M x 36        None

     136MB        (2) 8M x 36     (2) 8M x 36    (2) 1M x 36

     136MB       (2) 16M x 36     (2) 1M x 36        None

     144MB       (2) 16M x 36     (2) 2M x 36        None

     144MB       (2) 16M x 36     (2) 1M x 36    (2) 1M x 36

     152MB       (2) 16M x 36     (2) 2M x 36    (2) 1M x 36

     160MB       (2) 16M x 36     (2) 4M x 36        None

     160MB       (2) 16M x 36     (2) 2M x 36    (2) 2M x 36

     168MB       (2) 16M x 36     (2) 4M x 36    (2) 1M x 36

     176MB       (2) 16M x 36     (2) 4M x 36    (2) 2M x 36

     192MB       (2) 16M x 36     (2) 8M x 36        None

     192MB       (2) 16M x 36     (2) 4M x 36    (2) 4M x 36

     200MB       (2) 16M x 36     (2) 8M x 36    (2) 1M x 36

     208MB       (2) 16M x 36     (2) 8M x 36    (2) 2M x 36

     224MB       (2) 16M x 36     (2) 8M x 36    (2) 4M x 36

     256MB       (2) 16M x 36    (2) 16M x 36        None

     256MB       (2) 16M x 36     (2) 8M x 36    (2) 8M x 36

     264MB       (2) 16M x 36    (2) 16M x 36    (2) 1M x 36

     272MB       (2) 16M x 36    (2) 16M x 36    (2) 2M x 36

     288MB       (2) 16M x 36    (2) 16M x 36    (2) 4M x 36

     320MB       (2) 16M x 36    (2) 16M x 36    (2) 8M x 36

     384MB       (2) 16M x 36    (2) 16M x 36    (2) 16M x 36

  Note: Board accepts EDO memory.

                      CACHE CONFIGURATION

  Note: 256KB/512KB cache is located on the Pentium Pro CPU.

                  CPU SPEED SELECTION (PENTIUM 5 COLUMNS)

    CPU     Clock    Multiplier   CN13/     CN13/    CN13/   CN13/    J9
  speed     speed
                                   pins     pins     pins     pins

                                  1 & 5     2 & 6    3 & 7   4 & 8

  180MHz    60MHz        3x       Closed    Closed   Open    Closed   1 &
                                                                       2

  200MHz    66MHz        3x       Closed    Closed   Open    Closed   2 &
                                                                       3

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

   Voltage      CN14/pins 1    CN14/pins 2    CN14/pins 3   CN14/pins 4 &
                    & 5            & 6            & 7             8

       2.1v        Open           Open           Open          Closed

       2.2v        Open           Open          Closed          Open

       2.3v        Open           Open          Closed         Closed

       2.4v        Open          Closed          Open           Open

       2.5v        Open          Closed          Open          Closed

       2.6v        Open          Closed         Closed          Open

       2.7v        Open          Closed         Closed         Closed

       2.8v       Closed          Open           Open           Open

       2.9v       Closed          Open           Open          Closed

       3.0v       Closed          Open          Closed          Open

       3.1v       Closed          Open          Closed         Closed

       3.2v       Closed         Closed          Open           Open

      3.3v       Closed         Closed          Open          Closed

       3.4v       Closed         Closed         Closed          Open

       3.5v       Closed         Closed         Closed         Closed

                         SCSI TERMINATON SELECTION

                 Setting                                J10

             Termination disabled                       Open

             Termination enabled                 Pins 1 & 2 closed

       Termination switchable through           Pins 2 & 3 closed
             SCSI select utility

