
ACER, INC.

V55LA

Device Type          Mainboard
Processor            Pentium/CX 6X86/AM K5
Processor Speed      75/90/100/120/133/150/166/200MHz
Chip Set             Unidentified
Video Chip Set       Unidentified
Maximum Onboard      128MB (EDO & SDRAM supported)
Memory
Maximum Video Memory 2MB
Cache                256/512KB
BIOS                 Unidentified
Dimensions           254mm x 218mm
I/O Options          Bus mouse port, Ethernet 10BaseT connector, green PC
                     connector, IDE interfaces (2), parallel port, PS/2
                     mouse port, serial ports (2), VGA port, riser slot, IR
                     connector, line in, wavetable connector, audio in -
                     CD-ROM

[Image]

                                CONNECTIONS

  Purpose                     Location     Purpose            Location

  Multimedia/ethernet            CN1       Turbo LED         CN19/pins 12
  connector                                                     & 13

  Audio in - CD-ROM              CN2       Turbo             CN19/pins 15
                                                                - 17

  LAN connector                  CN5       Reset             CN19/pins 19
                                                                & 20

  Wavetable                      CN6       Video port           CN21

  PS/2 mouse port                CN8       Fax/modem            CN22
                                           connector

  Audio I/O board                CN9       Reset switch         CN30
  connector                                connector

  Floppy drive interface        CN10       Line in              CN31

  IDE interface 2               CN11       Power LED &           JP9
                                           hard disk

  IDE interface 1               CN12       Disk LED             JP10

  Serial port 1                 CN13       SMM switch       JP11/pins 1 &
                                                                  2

  Serial port 2                 CN14       Reset switch     JP11/pins 2 &
                                                                  3

  Parallel port                 CN17       Additional       JP11/pins 3 &
                                           reset switch           4

  CPU fan connector             CN18       Power switch         JP14
                                           connector

  Power LED & keylock        CN19/pins 1   Standby power        JP15
                                 - 5       connector

  Speaker                    CN19/pins 7   External             JP30
                                - 10       battery
                                           connector

                        USER CONFIGURABLE SETTINGS

              Function                  Label             Position

      BIOS type select Acer              JP1         Pins 1 & 2 closed

      BIOS type select OEM               JP1         Pins 2 & 3 closed

      LED for IDE/FDD                    JP2         Pins 1 & 2 closed

      LED for IDE only                   JP2         Pins 2 & 3 closed

      Allow boot block programming       JP5         Pins 1 & 2 closed

      Normal flash BIOS operation        JP5         Pins 2 & 3 closed

      Regulator 1 voltage                JP7               Closed

      Regulator 2 voltages               JP7                Open

      UPS enabled                       JP16         Pins 1 & 2 closed

      UPS disabled                      JP16         Pins 2 & 3 closed

     Factory configured - do not       JP19              Reserved
      alter

      Intel or CX 6X86 "1+4" mode       JP42         Pins 1 & 2 closed

      CX 6X86 linear burst mode         JP42         Pins 2 & 3 closed

      Onboard sound chip disabled       SW1/5                On

      Onboard sound chip enabled        SW1/5               Off

      Password bypass                   SW1/6                On

      Password check                    SW1/6               Off

              SIMM CONFIGURATION

     Size          Bank 0          Bank 1

      8MB        (2) 1M x 36        None

     16MB        (2) 2M x 36        None

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

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

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

              SIMM CONFIGURATION

     Size          Bank 0          Bank 1

     64MB        (2) 8M x 36        None

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

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

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

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

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

                        CACHE CONFIGURATION

      Size           Tag SRAM           Bank 0           Bank 1

      256KB        (2) 32K x 32      (2) 32K x 32         None

      512KB        (2) 32K x 32      (2) 32K x 32     (2) 32K x 32

                  CACHE JUMPER CONFIGURATION

        Size                 JP3                  JP4

       256KB          Pins 1 & 2 closed     Pins 1 & 2 closed

       512KB          Pins 1 & 2 closed     Pins 2 & 3 closed

        1 MB          Pins 2 & 3 closed     Pins 2 & 3 closed

            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       SW1/1         SW1/2

     75MHz          50MHz           On             On

     90MHz          60MHz           On            Off

    100MHz          66MHz           Off            On

    120MHz          60MHz           On            Off

    133MHz          66MHz           Off            On

    150MHz          60MHz           On            Off

    166MHz          66MHz           Off            On

    200MHz          66MHz           Off            On

  CPU FREQUENCY RATIO SELECTION (INTEL)

    Ratio         SW1/3         SW1/4

    1.5x           Off           On

    1.5x           Off           Off

     2x            On            Off

    2.5x           On            On

  CPU FREQUENCY RATIO SELECTION (CX 6X86)

     Ratio          SW1/3         SW1/4

      4x             Off           On

      3x             Off           Off

      2x             On            Off

      1x             On            On

  CPU FREQUENCY RATIO SELECTION (AM K5)

      K5           SW1/3        SW1/4

     1.5x           Off          Off

      2x            On            On

          BIOS ROM TYPE SELECTION

         Type                  JP6

       Flash ROM        Pins 1 & 2 closed

         EPROM          Pins 2 & 3 closed

  Block flash EEPROM           Open

         CPU I/O VOLTAGE SELECTION

       Voltage                JP43

         3.5v           Pins 1 & 2 closed

         3.3v           Pins 2 & 3 closed

        CPU CORE VOLTAGE SELECTION

       Voltage                JP44

         2.5v           Pins 1 & 2 closed

         2.8v           Pins 2 & 3 closed

