
ABIT COMPUTER CORPORATION

PW4/PW4T

Processor  80486SX/CX486M7/AM486DX/80486DX/AM486DX2/80486DX2/AM486DX4/
           80486DX4
Processor  20/25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       192MB
Onboard
DRAM
Cache      128/256/512/1024KB
BIOS       Award
Dimensions 330mm x 218mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  External battery             J1       Power LED & keylock       JW1

  Green PC connector          JP47      Speaker                   JW2

  Green PC connector          JP48      Turbo LED                 JW3

  Green PC connector          JP49      Turbo switch              JW4

  Green PC connector          JP50      Reset switch              JW5

  Green PC connector          JP51      32-bit VESA local      SL1 - SL3
                                        bus slots

  Green PC connector          JP52

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     Factory configured - do not alter         JP1          pins 2 & 3
                                                              closed

     Factory configured - do not alter         JP2            Open

     Monitor type select color                 JP5           Closed

      Monitor type select monochrome            JP5            Open

     Factory configured - do not alter         JP6            Open

     Factory configured - do not alter        JP14            Open

     CPU type select AMD/Cyrix/Intel          JP15          pins 1 - 5
                                                              closed

      CPU type select AMD486DX2 only           JP15          pins 2 - 6
                                                              closed

     Factory configured - do not alter        JP16          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP17          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP19            Open

     Factory configured - do not alter        JP23          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP45            Open

     Factory configured - do not alter        JP46            Open

     Factory configured - do not alter        JP58            Open

     Factory configured - do not alter        JP59            Open

     Factory configured - do not alter        JP64           Closed

     Factory configured - do not alter        JP66            Open

     CMOS memory normal operation             JP67          pins 1 & 2
                                                              closed

      CMOS memory clear                        JP67          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP68            Open

     Factory configured - do not alter        JP69            Open

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         NONE            NONE

       1MB             NONE        (1) 256K x 36        NONE

       1MB             NONE             NONE        (1) 256K x 36

       2MB         (4) 256K x 9    (1) 256K x 36        NONE

       2MB         (4) 256K x 9    (1) 256K x 36        NONE

       2MB             NONE        (1) 256K x 36    (1) 256K x 36

       2MB             NONE        (1) 512K x 36        NONE

       2MB             NONE             NONE        (1) 512K x 36

       3MB         (4) 256K x 9    (1) 512K x 36        NONE

       3MB         (4) 256K x 9    (1) 256K x 36    (1) 256K x 36

       3MB         (4) 256K x 9    (1) 512K x 36        NONE

       3MB             NONE        (1) 256K x 36    (1) 512K x 36

       4MB          (4) 1M x 9          NONE            NONE

       4MB             NONE         (1) 1M x 36         NONE

       4MB             NONE        (1) 512K x 36    (1) 512K x 36

       4MB             NONE             NONE         (1) 1M x 36

       5MB         (4) 256K x 9     (1) 1M x 36         NONE

       5MB          (4) 1M x 9     (1) 256K x 36        NONE

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

       5MB          (4) 1M x 9     (1) 256K x 36        NONE

       5MB         (4) 256K x 9    (1) 512K x 36    (1) 512K x 36

       5MB             NONE        (1) 256K x 36     (1) 1M x 36

       6MB          (4) 1M x 9     (1) 512K x 36        NONE

       6MB          (4) 1M x 9     (1) 256K x 36    (1) 256K x 36

       6MB         (4) 256K x 9    (1) 256K x 36     (1) 1M x 36

       6MB          (4) 1M x 9     (1) 512K x 36        NONE

       6MB             NONE         (1) 1M x 36     (1) 512K x 36

       8MB          (4) 1M x 9      (1) 1M x 36         NONE

       8MB          (4) 1M x 9     (1) 512K x 36    (1) 512K x 36

       8MB             NONE         (1) 2M x 36         NONE

       8MB             NONE             NONE         (1) 2M x 36

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

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

       9MB         (4) 256K x 9     (1) 2M x 36         NONE

      11MB         (4) 256K x 9    (1) 512K x 36     (1) 2M x 36

      12MB          (4) 1M x 9      (1) 2M x 36         NONE

      12MB          (4) 1M x 9      (1) 1M x 36      (1) 1M x 36

      12MB          (4) 1M x 9      (1) 2M x 36         NONE

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

      16MB          (4) 4M x 9          NONE            NONE

      16MB             NONE         (1) 4M x 36         NONE

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

      16MB             NONE             NONE         (1) 4M x 36

      17MB         (4) 256K x 9     (1) 4M x 36         NONE

      17MB          (4) 4M x 9     (1) 256K x 36        NONE

      17MB         (4) 256K x 9     (1) 2M x 36      (1) 2M x 36

      17MB             NONE        (1) 256K x 36     (1) 4M x 36

      18MB          (4) 4M x 9     (1) 512K x 36        NONE

      18MB          (4) 4M x 9     (1) 256K x 36    (1) 256K x 36

      18MB         (4) 256K x 9    (1) 256K x 36     (1) 4M x 36

      18MB          (4) 4M x 9     (1) 512K x 36        NONE

      18MB             NONE         (1) 4M x 36     (1) 512K x 36

      20MB          (4) 1M x 9      (1) 4M x 36         NONE

      20MB          (4) 4M x 9      (1) 1M x 36         NONE

      20MB          (4) 1M x 9      (1) 2M x 36      (1) 2M x 36

      20MB          (4) 4M x 9     (1) 512K x 36    (1) 512K x 36

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

      21MB          (4) 4M x 9     (1) 256K x 36     (1) 1M x 36

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

      21MB          (4) 1M x 9     (1) 256K x 36     (1) 4M x 36

      21MB         (4) 256K x 9     (1) 1M x 36      (1) 4M x 36

      24MB          (4) 4M x 9      (1) 2M x 36         NONE

      24MB          (4) 4M x 9      (1) 1M x 36      (1) 1M x 36

      24MB          (4) 1M x 9      (1) 1M x 36      (1) 4M x 36

      24MB          (4) 4M x 9      (1) 2M x 36         NONE

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

      32MB          (4) 4M x 9      (1) 4M x 36         NONE

      32MB          (4) 4M x 9      (1) 2M x 36      (1) 2M x 36

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

      32MB             NONE         (1) 8M x 36         NONE

      32MB             NONE             NONE         (1) 8M x 36

      33MB         (4) 256K x 9     (1) 8M x 36         NONE

      33MB          (4) 4M x 9     (1) 256K x 36     (1) 4M x 36

      33MB         (4) 256K x 9     (1) 4M x 36      (1) 4M x 36

      33MB         (4) 256K x 9     (1) 8M x 36         NONE

      33MB             NONE        (1) 256K x 36     (1) 8M x 36

      34MB             NONE        (1) 512K x 36     (1) 8M x 36

      35MB         (4) 256K x 9    (1) 512K x 36     (1) 8M x 36

      36MB          (4) 1M x 9      (1) 8M x 36         NONE

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

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

      36MB          (4) 1M x 9      (1) 8M x 36         NONE

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

      38MB          (4) 1M x 9     (1) 512K x 36     (1) 8M x 36

      40MB             NONE         (1) 2M x 36      (1) 8M x 36

      41MB         (4) 256K x 9     (1) 2M x 36      (1) 8M x 36

      44MB          (4) 1M x 9      (1) 2M x 36      (1) 8M x 36

      48MB          (4) 4M x 9      (1) 8M x 36         NONE

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

      48MB             NONE         (1) 4M x 36      (1) 8M x 36

      56MB          (4) 4M x 9      (1) 2M x 36      (1) 8M x 36

      64MB         (4) 16M x 9          NONE            NONE

      64MB             NONE         (1) 16M x 36        NONE

      64MB             NONE         (1) 8M x 36      (1) 8M x 36

      64MB             NONE             NONE        (1) 16M x 36

      65MB         (4) 256K x 9     (1) 16M x 36        NONE

      65MB         (4) 16M x 9     (1) 256K x 36        NONE

      65MB         (4) 16M x 9     (1) 256K x 36        NONE

      65MB         (4) 256K x 9     (1) 8M x 36      (1) 8M x 36

      65MB             NONE        (1) 256K x 36    (1) 16M x 36

      66MB         (4) 16M x 9     (1) 512K x 36        NONE

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

      66MB         (4) 16M x 9     (1) 256K x 36    (1) 256K x 36

      66MB         (4) 256K x 9    (1) 256K x 36    (1) 16M x 36

      66MB         (4) 16M x 9     (1) 512K x 36        NONE

      66MB             NONE         (1) 16M x 36    (1) 512K x 36

      68MB          (4) 1M x 9      (1) 16M x 36        NONE

      68MB         (4) 16M x 9      (1) 1M x 36         NONE

      68MB          (4) 1M x 9      (1) 8M x 36      (1) 8M x 36

      68MB         (4) 16M x 9     (1) 512K x 36    (1) 512K x 36

      68MB             NONE         (1) 1M x 36     (1) 16M x 36

      69MB         (4) 16M x 9     (1) 256K x 36     (1) 1M x 36

      69MB          (4) 1M x 9     (1) 256K x 36    (1) 16M x 36

      69MB         (4) 256K x 9     (1) 1M x 36     (1) 16M x 36

      72MB         (4) 16M x 9      (1) 2M x 36         NONE

      72MB         (4) 16M x 9      (1) 1M x 36      (1) 1M x 36

      72MB          (4) 1M x 9      (1) 1M x 36     (1) 16M x 36

      72MB         (4) 16M x 9      (1) 2M x 36         NONE

      72MB             NONE         (1) 16M x 36     (1) 2M x 36

      74MB         (4) 16M x 9     (1) 512K x 36     (1) 2M x 36

      80MB          (4) 4M x 9      (1) 16M x 36        NONE

      80MB         (4) 16M x 9      (1) 4M x 36         NONE

      80MB         (4) 16M x 9      (1) 2M x 36      (1) 2M x 36

      81MB         (4) 16M x 9     (1) 256K x 36     (1) 4M x 36

      81MB          (4) 4M x 9     (1) 256K x 36    (1) 16M x 36

      81MB         (4) 256K x 9     (1) 4M x 36     (1) 16M x 36

      84MB         (4) 16M x 9      (1) 1M x 36      (1) 4M x 36

      84MB          (4) 4M x 9      (1) 1M x 36     (1) 16M x 36

      84MB          (4) 1M x 9      (1) 4M x 36     (1) 16M x 36

      96MB         (4) 16M x 9      (1) 8M x 36         NONE

      96MB          (4) 4M x 9      (1) 4M x 36     (1) 16M x 36

      96MB             NONE         (1) 16M x 36     (1) 8M x 36

      128MB        (4) 16M x 9      (1) 16M x 36        NONE

      128MB        (4) 16M x 9      (1) 8M x 36      (1) 8M x 36

      128MB            NONE         (1) 16M x 36    (1) 16M x 36

      129MB        (4) 16M x 9     (1) 256K x 36    (1) 16M x 36

      129MB        (4) 256K x 9     (1) 16M x 36    (1) 16M x 36

      132MB        (4) 16M x 9      (1) 1M x 36     (1) 16M x 36

      132MB         (4) 1M x 9      (1) 16M x 36    (1) 16M x 36

      144MB        (4) 16M x 9      (1) 4M x 36     (1) 16M x 36

      144MB         (4) 4M x 9      (1) 16M x 36    (1) 16M x 36

      192MB        (4) 16M x 9      (1) 16M x 36    (1) 16M x 36

                      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

     256KB        (4) 64K x 8        NONE        (1) 64K x 8

     512KB        (4) 64K x 8     (4) 64K x 8    (1) 64K x 8

     512KB       (4) 128K x 8        NONE        (1) 128K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 128K x 8

                        CACHE JUMPER CONFIGURATION

    Size         JP60            JP61           JP62            JPX3

   128KB       pins 2 & 3     pins 1 & 2      pins 2 & 3     pins 9 - 16
                closed          closed         closed          closed

   256KB       pins 2 & 3     pins 1 & 2      pins 2 & 3     pins 13 - 20
                closed          closed         closed          closed

   256KB       pins 2 & 3     pins 2 & 3      pins 2 & 3     pins 3 - 10
                closed          closed         closed          closed

   512KB       pins 2 & 3     pins 1 & 2      pins 2 & 3      pins 1 - 8
                closed          closed         closed          closed

   512KB       pins 2 & 3     pins 1 & 2      pins 2 & 3     pins 3 - 10
                closed          closed         closed          closed

    1MB        pins 1 & 2     pins 1 & 2      pins 1 & 2      pins 1 - 8
                closed          closed         closed          closed

                          CPU TYPE CONFIGURATION

       Type           JP37     JP38      JP39      JP40          RN8

      80486SX         Open     Open      Open      Open       Installed

     SL80486SX        Open     Open      Open      Open       Installed

      CX486M7         Open     Open      Open      Open       Installed

    AM486DX/DX2       Open     Open      Open      Open       Installed

    80486DX/DX2       Open     Open      Open      Open       Installed

   SL80486DX/DX2      Open     Open      Open      Open       Installed

   AM486DX2/DX4       Open     1 & 2     Open      1 & 2    Not installed

    CX486DX2-50      1 & 2     Open      Open      Open     Not installed

    CX486DX2-66       Open     Open      1 & 2     Open     Not installed

    CX486DX2-80       Open     Open      Open      1 & 2    Not installed

    80486DX4-75      1 & 2     Open      Open      Open     Not installed

   80486DX4-100       Open     1 & 2     Open      1 & 2    Not installed

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

      Type            RN5          RN6           RN7        JP20    JP26

     80486SX          Not       Installed        Not       Closed   1 & 2
                   installed                  installed

    SL80486SX         Not       Installed        Not       Closed   1 & 2
                   installed                  installed

     CX486M7       Installed        Not       Installed     Open    1 & 2
                                installed

   AM486DX/DX2        Not       Installed     Installed     Open    1 & 2
                   installed

   80486DX/DX2        Not       Installed     Installed     Open    1 & 2
                   installed

  SL80486DX/DX2       Not       Installed     Installed     Open    1 & 2
                   installed

    80486DX4          Not       Installed     Installed     Open    Open
                   installed

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type            JP42         JP65          JPX1          JPX2

      80486SX           Open         Open       pins 5 - 12      Open
                                                  closed

     SL80486SX         Closed        Open       pins 5 - 12      Open
                                                  closed

      CX486M7          Closed       Closed      pins 1 - 8     pins 1 - 8
                                                  closed        closed

    AM486DX/DX2         Open        Closed      pins 5 - 12      Open
                                                  closed

    80486DX/DX2         Open        Closed      pins 5 - 12      Open
                                                  closed

   SL80486DX/DX2       Closed       Closed      pins 5 - 12      Open
                                                  closed

      80486DX4         Closed       Closed      pins 5 - 12      Open
                                                  closed

  CPU SPEED CONFIGURATION(AVASEM AV9107 CLOCK GENERATOR)

     Speed          JP27           JP28          JP29

     20MHz          Open           Open         Closed

     25MHz         Closed          Open         Closed

     33MHz          Open          Closed        Closed

     40MHz         Closed          Open          Open

    50iMHz         Closed          Open         Closed

    66iMHz          Open          Closed        Closed

    75iMHz         Closed          Open         Closed

    80iMHz         Closed          Open          Open

    100iMHz         Open          Closed        Closed

  CPU SPEED CONFIGURATION(MXIC MX8315/WINBOND W83C17 CLOCK GENERATOR)

      Speed              JP27              JP28              JP29

      20MHz              Open              Open              Open

      25MHz              Open              Open             Closed

      33MHz             Closed            Closed            Closed

      40MHz              Open             Closed            Closed

      50iMHz             Open              Open             Closed

      66iMHz            Closed            Closed            Closed

      75iMHz             Open              Open             Closed

      80iMHz             Open             Closed            Closed

     100iMHz            Closed            Closed            Closed

  VESA WAIT STATE CONFIGURATION

   Wait states          JP9

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP10

   <= 33MHz        Open

   > 33MHz        Closed

