
ACER, INC.

ACERALTOS 900K (M11C) (IDCMT), M11C (IDCMT)

Device Type                Mainboard
Processor                  Pentium II
Processor Speed            233/266MHz
Chip Set                   Intel 440FX
Video Chip Set             Unidentified
Maximum Onboard Memory     512MB
Maximum Video Memory       2MB
Cache                      256/512KB (located on Pentium II CPU)
BIOS                       Acer
Dimensions                 305mm x 244mm
I/O Options                32-bit PCI slots (3), Ethernet 10BaseT
                           connector, floppy drive interface, IDE
                           interfaces (2), SCSI-2 interface, Wide SCSI
                           interface, parallel port, PS/2 mouse port,
                           serial ports (2), VGA feature connector, VGA
                           port, USB connectors (2), ATX power connector

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  ATX power connector       ATX        SCSI-2 interface          CN18

  5v power                  CN1        Serial port               CN19

  RDM connector             CN3        Serial port              CN19A

  RDM connector             CN4        Floppy drive              CN20
                                       interface

  USB connector 1           CN5        Wide SCSI interface       CN23

  USB connector 2          CN5A        IDE interface 1           CN24

  3.3v power                CN6        IDE interface LED         CN25

  420W power                CN7        Reset, turbo LED          CN26
  connector                            keylock

  250W power                CN8        Speaker                   CN27
  connector

  Chassis intrusion         CN9        Power LED                 CN28
  connector

  Thermal sensor           CN10        IDE interface 2           CN29
  connector

  Soft off power           CN11        VGA feature               CN30
  supply                               connector

  Ethernet 10BaseT         CN12        Chassis fan power         FA1
  connector

  Parallel port            CN13        Chassis fan power         FA2

  VGA port                 CN13A       Chassis fan power         FA3

  Redundant power          CN14        Chassis fan power         FA4
  supply connector

  LED connector            CN15        32-bit PCI slots       PC1 - PC3

  PS/2 mouse port          CN17

  Note: The location of ATX is unidentified.

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     420W enabled                          JP1        Pins 1 & 2 closed

      420W disabled                         JP1        Pins 2 & 3 closed

     Factory configured - do not           JP3          Unidentified
      alter

     BIOS type select Acer                 JP4        Pins 1 & 2 closed

      BIOS type select OEM                  JP4        Pins 2 & 3 closed

     Password disabled                     JP5        Pins 2 & 3 closed

      Password enabled                      JP5        Pins 1 & 2 closed

     Termination enabled                   JP6        Pins 1 & 2 closed

      Termination switchable through        JP6        Pins 2 & 3 closed
      SCSI select utility

     On board video enabled                JP7        Pins 1 & 2 closed

      On board video disabled               JP7        Pins 2 & 3 closed

     Buzzer enabled                        JP8        Pins 1 & 2 closed

      Buzzer disabled                       JP8        Pins 2 & 3 closed

     Software power down enabled           JP9        Pins 2 & 3 closed

      General power supply enabled          JP9        Pins 1 & 2 closed

     Flash BIOS write protect             JP12        Pins 1 & 2 closed
      enabled

      Flash BIOS write protect             JP12        Pins 2 & 3 closed
      disabled

                            DIMM CONFIGURATION

     Size          Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

     32MB        (1) 4M x 64       None           None           None

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

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

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

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

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

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

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

     128MB       (1) 16M x 64      None           None           None

     256MB       (1) 16M x 64  (1) 16M x 64       None           None

     384MB       (1) 16M x 64  (1) 16M x 64   (1) 16M x 64       None

     512MB       (1) 16M x 64  (1) 16M x 64   (1) 16M x 64   (1) 16M x 64

                     CACHE CONFIGURATION

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

            VIDEO MEMORY CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (2) 256K x 16         None

       2MB        (2) 256K x 16    (2) 256K x 16

                            CPU SPEED SELECTION

    CPU speed       Clock speed         Multiplier             JP2

     233MHz            66MHz               3.5x           Pins 1 & 2, 4 &
                                                             5 closed

     266MHz            66MHz                4x            Pins 1 & 2, 4 &
                                                             5 closed

                           FLASH BIOS SELECTION

                 Setting                                JP11

           Controlled by software               Pins 1 & 2 closed

                      5v                                Open

                     12v                         Pins 2 & 3 closed

