
ACER, INC.

ACERMATE 486

Device Type   Mainboard
Processor     CX486/IBM486/TI486/80486SX/AM486DX/80486DX/AM486DX2/

              80486DX2/AM486DX4/80486DX4/P24T
Processor     25/33/50(internal)/66(internal)/100(internal)MHz
Speed
Chip Set      Unidentified
Video Chip SetCirrus Logic
Maximum       36MB
Onboard Memory
Maximum Video 2MB
Memory
Cache         128/256KB
BIOS          Unidentified
Dimensions    330mm x 218mm
I/O Options   Floppy drive interface, IDE interfaces (2), parallel port,
              PS/2 mouse port, serial ports (2), riser slot, VGA port, VGA
              feature connector

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Chassis fan power           C1       IDE interface 1             CN7

  VGA port                    CN1      Floppy drive interface      CN8

  Parallel port               CN2      VGA feature connector       CN9

  Serial port 2               CN3      Daughter board             JP44
                                       connector

  Serial port 1               CN4      Daughter board             JP45
                                       connector

  PS/2 mouse port             CN5      Riser slot                  SL1

  IDE interface 2             CN6

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           J1           Unidentified
      alter

     Factory configured - do not           J2           Unidentified
      alter

     Factory configured - do not           J3           Unidentified
      alter

     Factory configured - do not           JP1          Unidentified
      alter

      Password enabled                      JP2        Pins 1 & 2 closed

      Password disabled                     JP2        Pins 2 & 3 closed

     Factory configured - do not           JP4          Unidentified
      alter

      On board video enabled               JP14             Closed

      On board video disabled              JP14              Open

      IDE interface enabled                JP16              Open

      IDE interface disabled               JP16             Closed

      On board I/O enabled                 JP21             Closed

      On board I/O disabled                JP21              Open

     Factory configured - do not          JP22          Unidentified
      alter

     Factory configured - do not          JP29          Unidentified
      alter

  Note: The location of JP16 is unidentified.

                        SIMM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       4MB             4MB              None            None

       5MB             4MB         (1) 256K x 36        None

       6MB             4MB         (1) 256K x 36    (1) 256K x 36

       7MB             4MB         (1) 256K x 36    (1) 512K x 36

       8MB             4MB          (1) 1M x 36         None

       9MB             4MB          (1) 1M x 36     (1) 256K x 36

                    SIMM CONFIGURATION (CON'T)

      Size            Bank 0           Bank 1          Bank 2

      10MB             4MB          (1) 1M x 36     (1) 512K x 36

      12MB             4MB          (1) 1M x 36      (1) 1M x 36

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

      20MB             4MB          (1) 4M x 36         None

      21MB             4MB          (1) 4M x 36     (1) 256K x 36

      22MB             4MB          (1) 4M x 36     (1) 512K x 36

      24MB             4MB          (1) 4M x 36      (1) 1M x 36

      28MB             4MB          (1) 4M x 36      (1) 2M x 36

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

  Note: Bank 0 is factory installed and is not configurable.

                   DRAM CONFIGURATION

          Setting                      JP28

  On board memory enabled        Pins 1 & 2 closed

  On board memory disabled       Pins 2 & 3 closed

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     128KB      (4) 32K x 8        None       (1) 32K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size              JP24               JP25               JP26

      128KB             Open              Closed        Pins 1 & 2 closed

      256KB            Closed             Closed        Pins 2 & 3 closed

                    VIDEO MEMORY CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

      512KB           512KB             None            None

       1MB            512KB         (4) 256K x 4        None

       2MB            512KB         (4) 256K x 4    (2) 256K x 16

                            CPU SPEED SELECTION

     Speed          CN14           JP10          JP17            JP19

     25MHz       Pins 4 & 8     Pins 2 & 3     Pins 2 & 3     Pins 2 & 3
                   closed         closed        closed          closed

     33MHz       Pins 3 & 7     Pins 2 & 3     Pins 2 & 3     Pins 2 & 3
                   closed         closed        closed          closed

    50iMHz       Pins 4 & 8     Pins 2 & 3     Pins 2 & 3     Pins 2 & 3
                   closed         closed        closed          closed

    66iMHz       Pins 3 & 7     Pins 2 & 3     Pins 2 & 3     Pins 2 & 3
                   closed         closed        closed          closed

    100iMHz      Pins 3 & 7     Pins 2 & 3     Pins 2 & 3     Pins 2 & 3
                   closed         closed        closed          closed

                            CPU TYPE SELECTION

      Type          JP11       JP12        JP13       JP18        JP20

     CX486         2 & 3       1 & 2      1 & 2       2 & 3       1 & 2

     IBM486        2 & 3       1 & 2      1 & 2       2 & 3       1 & 2

     TI486         2 & 3       2 & 3      2 & 3       2 & 3       2 & 3

    80486SX        1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

    AM486DX        1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

    80486DX        1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

    AM486DX2       1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

    80486DX2       1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

  80486DX2 (WB)    1 & 2       2 & 3      1 & 2       1 & 2       2 & 3

    AM486DX4       1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

    80486DX4       1 & 2       1 & 2      1 & 2       2 & 3       2 & 3

  80486DX4 (WB)    1 & 2       2 & 3      1 & 2       1 & 2       2 & 3

      P24T         1 & 2       2 & 3      1 & 2       1 & 2       2 & 3

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CON'T)

     Type         JP30        JP31         JP32       JP33        JP34

    CX486        Closed      Closed       Closed      2 & 3       Open

    IBM486       Closed      Closed       Closed      2 & 3       Open

    TI486         Open        Open         Open       1 & 2       Open

   80486SX        Open        Open         Open       1 & 2      Closed

   AM486DX        Open        Open         Open       1 & 2       Open

   80486DX        Open        Open         Open       1 & 2      Closed

   AM486DX2       Open        Open         Open       1 & 2       Open

   80486DX2       Open        Open         Open       1 & 2      Closed

   80486DX2       Open        Open         Open       1 & 2      Closed
     (WB)

   AM486DX4       Open        Open         Open       1 & 2       Open

   80486DX4       Open        Open         Open       1 & 2      Closed

   80486DX4       Open        Open         Open       1 & 2      Closed
     (WB)

     P24T         Open        Open         Open       1 & 2      Closed

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CON'T)

     Type          JP35         JP36        JP39       JP40       JP41

     CX486         Open         Open       1 & 2, 4    2 & 3      2 & 3
                                             & 5

    IBM486         Open         Open       1 & 2, 4    2 & 3      2 & 3
                                             & 5

     TI486         Open         Open       2 & 3, 5    2 & 3      2 & 3
                                             & 6

    80486SX       Closed       Closed      1 & 2, 4    2 & 3      2 & 3
                                             & 5

    AM486DX        Open         Open       1 & 2, 4    1 & 2      1 & 2
                                             & 5

    80486DX       Closed       Closed      1 & 2, 4    2 & 3      2 & 3
                                             & 5

   AM486DX2        Open         Open       1 & 2, 4    1 & 2      1 & 2
                                             & 5

   80486DX2       Closed       Closed      1 & 2, 4    2 & 3      2 & 3
                                             & 5

    80486DX2      Closed       Closed      1 & 2, 4    2 & 3      2 & 3
     (WB)                                    & 5

   AM486DX4        Open         Open       1 & 2, 4    1 & 2      1 & 2
                                             & 5

   80486DX4       Closed       Closed      1 & 2, 4    2 & 3      2 & 3
                                             & 5

    80486DX4      Closed       Closed      1 & 2, 4    2 & 3      2 & 3
     (WB)                                    & 5

     P24T         Closed       Closed      1 & 2, 4    2 & 3      2 & 3
                                             & 5

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CON'T)

     Type          JP42       JP43       JP46        JP47        JP48

     CX486        2 & 3       Open       1 & 2      2 & 3        Open

    IBM486        2 & 3       Open       1 & 2      2 & 3        Open

     TI486        1 & 2       Open       1 & 2      1 & 2        Open

    80486SX       2 & 3       Open       1 & 2      1 & 2        Open

    AM486DX       2 & 3       Open       1 & 2      1 & 2       Closed

    80486DX       2 & 3       Open       1 & 2      1 & 2        Open

   AM486DX2       2 & 3       Open       1 & 2      1 & 2       Closed

   80486DX2       2 & 3       Open       1 & 2      1 & 2        Open

    80486DX2      2 & 3       Open       2 & 3      1 & 2        Open
     (WB)

    AM486DX       2 & 3       Open       1 & 2      1 & 2        Open

   80486DX4       2 & 3       Open       1 & 2      1 & 2        Open

    80486DX4      2 & 3       Open       2 & 3      1 & 2        Open
     (WB)

     P24T         2 & 3       Open       2 & 3      1 & 2        Open

  Note: Pins designated should be in the closed position.

                        RESET/RESUME SELECTION

        Setting                  JP37                    JP38

      Reset button         Pins 1 & 2 closed      Pins 1 & 2 closed

  Suspend/reset button     Pins 2 & 3 closed      Pins 2 & 3 closed

