
ACER, INC.

ACERMATE 486/G (A1GX)

Device Type Mainboard
Processor   80486/80486WB/CX486DX2/IBM486DX2/AM486DX2/AM486DX4/

            P24T
Processor   25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set    ALI M1429
Video Chip  Cirrus Logic
Set
Maximum     36MB
Onboard
Memory
Maximum     2MB
Video
Memory
Cache       128/256KB
BIOS        Unidentified
Dimensions  285mm x 220mm
I/O Options Floppy drive interface, IDE interfaces (2), parallel port, PS/2
            mouse port, serial ports (2), VGA feature connector, VGA port,
            riser slot

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Chassis fan power           C1       PS/2 mouse port             CN5

  Feature connector           C2       Floppy drive interface      CN6

  VGA port                    CN1      IDE interface 2             CN7

  Parallel port               CN2      IDE interface 1             CN8

  Serial port 2               CN3      VGA feature connector       CN9

  Serial port 1               CN4      Riser slot                  SL1

                        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

     BIOS type select Acer                 JP1        Pins 2 & 3 closed

      BIOS type select OEM                  JP1        Pins 1 & 2 closed

     Password disabled                     JP2        Pins 2 & 3 closed

      Password enabled                      JP2        Pins 1 & 2 closed

     Normal boot enabled                   JP3        Pins 2 & 3 closed

      COM1 boot enabled                     JP3        Pins 1 & 2 closed

     On board I/O enabled                  JP6        Pins 2 & 3 closed

      On board I/O disabled                 JP6        Pins 1 & 2 closed

     On board video enabled                JP9        Pins 2 & 3 closed

      On board video disabled               JP9        Pins 1 & 2 closed

     IDE address select 074H, 078H,       JP10        Pins 2 & 3 closed
      07CH

      IDE address select 0F4H, 0F8H,       JP10        Pins 1 & 2 closed
      0FCH

     Factory configured - do not          JP11          Unidentified
      alter

     Factory configured - do not          JP12          Unidentified
      alter

     Factory configured - do not          JP19          Unidentified
      alter

     Reset button enabled                 JP28        Pins 2 & 3 closed

      Reset/green PC button enabled        JP28        Pins 1 & 2 closed

     IDE interface enabled                JP29        Pins 2 & 3 closed

      IDE interface disabled               JP29        Pins 1 & 2 closed

     BIOS type select EPROM               JPX1        Pins 2 & 3 closed

      BIOS type select flash               JPX1        Pins 1 & 2 closed

                    SIMM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2

      4MB           4MB            None          None

      4MB           None       (1) 1M x 36       None

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

      8MB           None       (1) 2M x 36       None

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

     12MB           4MB        (1) 2M x 36       None

                SIMM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1        Bank 2

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

     12MB           None       (1) 1M x 36    (1) 2M x 36

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

     16MB           None       (1) 4M x 36       None

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

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

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

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

     24MB           None       (1) 2M x 36    (1) 4M x 36

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

     32MB           None       (1) 4M x 36    (1) 4M x 36

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

                         SIMM JUMPER CONFIGURATION

            Size                       JP4                   JP5

      On board 4MB enabled     Pins 1 & 2 closed     Pins 2 & 3 closed

       On board 8MB enabled     Pins 2 & 3 closed     Pins 1 & 2 closed

          On board memory       Pins 1 & 2 closed     Pins 1 & 2 closed
             disabled

                    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                 JP30                 JP31

        128KB          Pins 1 & 2 closed   Pins 1 & 2 closed

        256KB          Pins 2 & 3 closed   Pins 2 & 3 closed

                    VIDEO MEMORY CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

      512KB       (1) 256K x 16         None            None

       1MB        (1) 256K x 16    (1) 256K x 16        None

       2MB        (1) 256K x 16    (1) 256K x 16    (2) 256K x 16

                            CPU TYPE SELECTION

      Type         JP13        JP14       JP15        JP17        JP18

     80486         2 & 3      2 & 3       2 & 3       2 & 3       2 & 3

    80486WB        2 & 3      2 & 3       2 & 3       2 & 3       2 & 3

   CX486DX2 *      2 & 3       Open       1 & 2       1 & 2       2 & 3

  IBM486DX2 *      2 & 3       Open       1 & 2       1 & 2       2 & 3

    CX486DX2       2 & 3       Open       1 & 2       1 & 2       2 & 3

   IBM486DX2       2 & 3       Open       1 & 2       1 & 2       2 & 3

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

  AM486DX2(WB)     2 & 3      1 & 2       1 & 2       2 & 3       1 & 2

   AM 486DX4       2 & 3      1 & 2       1 & 2       2 & 3       1 & 2

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

  Note: Pins designated should be in the closed position. * = 3.3v, 3.45v
  CPU.

                        CPU TYPE SELECTION (CONT)

      Type         JP19        JP20       JP21        JP22        JP23

     80486         2 & 3      2 & 3       2 & 3       2 & 3       2 & 3

    80486WB        1 & 2      2 & 3       2 & 3       1 & 2       2 & 3

   CX486DX2 *      2 & 3      1 & 2       1 & 2       2 & 3       1 & 2

  IBM486DX2 *      2 & 3      1 & 2       1 & 2       2 & 3       1 & 2

    CX486DX2       2 & 3      1 & 2       1 & 2       2 & 3       1 & 2

   IBM486DX2       2 & 3      1 & 2       1 & 2       2 & 3       1 & 2

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

  AM486DX2(WB)     2 & 3      2 & 3       2 & 3       2 & 3       2 & 3

   AM 486DX4       2 & 3      2 & 3       2 & 3       2 & 3       2 & 3

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

  Note: Pins designated should be in the closed position. * = 3.3v, 3.45v
  CPU.

                        CPU TYPE SELECTION (CONT)

      Type        JP25      JP26      JP27      JP32     JPX2      JPX3

     80486        2 & 3     2 & 3    3 & 4     1 & 2     2 & 3     2 & 3

    80486WB       2 & 3     1 & 2    3 & 4     1 & 2     2 & 3     2 & 3

   CX486DX2 *     1 & 2     2 & 3    2 & 3     1 & 2     2 & 3     2 & 3

  IBM486DX2 *     1 & 2     2 & 3    2 & 3     1 & 2     2 & 3     2 & 3

    CX486DX2      1 & 2     2 & 3    3 & 4     1 & 2     2 & 3     2 & 3

   IBM486DX2      1 & 2     2 & 3    3 & 4     1 & 2     2 & 3     2 & 3

    AM486DX2      1 & 2     2 & 3    3 & 4     1 & 2     2 & 3     2 & 3

  AM486DX2(WB)    1 & 2     2 & 3    2 & 3     1 & 2     2 & 3     2 & 3

   AM 486DX4      1 & 2     2 & 3    3 & 4     1 & 2     2 & 3     2 & 3

      P24T        2 & 3     1 & 2    3 & 4     1 & 2     2 & 3     2 & 3

  Note: Pins designated should be in the closed position. * = 3.3v, 3.45v
  CPU.

                           DMA CHANNEL SELECTION

         Channel                   JP7                      JP8

              1             Pins 1 & 2 closed        Pins 1 & 2 closed

             3             Pins 2 & 3 closed        Pins 2 & 3 closed

