
CONCORD OFFICE AUTOMATION INDUSTRIAL (HK) LTD.

COA-921

Processor  80486SX/SL80486SX/UMC486DX/AM486DX/80486DX/SL80486DX/
           CX486DX2/IBM486DX2/TI486DX2/UMC486DX2/AM486DX2/
           80486DX2/SL80486DX2/CX486DX4/IBM486DX4/AM486DX4/
           (SL)AM486DX4/SL80486DX4/CXP24D/P24D/P24T/CX5X86
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)/
Speed      120(internal)MHz
Chip Set   UMC
Video Chip None
Set
Maximum    256MB
Onboard
Memory
Maximum    None
Video
Memory
Cache      64/128/256/512KB
BIOS       Unidentified
Dimensions 254mm x 218mm
I/O        32-bit PCI slots (3), floppy drive interface, green PC connector,
Options    IDE interfaces (2), parallel port, serial ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Floppy drive interface     CN1       IDE interface LED          J29

  Parallel port              CN2       Turbo switch               J30

  Serial port                CN3       Reset switch               J31

  Serial port                CN4       Turbo LED                  J32

  IDE interface 2            CN5       Speaker                    J33

  IDE interface 1            CN6       Power LED & keylock        J34

  External battery            J2       32-bit PCI slots         PC1 - PC3

  Green PC connector         J10

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           J1           Unidentified
      alter

      Battery type select external          J2              Closed

      Battery type select internal          J2         Pins 2 & 3 closed

      CMOS memory clear                     J2         Pins 3 & 4 closed

     Factory configured - do not           J5           Unidentified
      alter

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (1) 256K x 36         None

       4MB         (1) 1M x 36          None

       8MB         (1) 2M x 36          None

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

      12MB         (1) 2M x 36      (1) 1M x 36

      16MB         (1) 4M x 36          None

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

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

      24MB         (1) 4M x 36      (1) 2M x 36

      32MB         (1) 8M x 36          None

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

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

      40MB         (1) 8M x 36      (1) 2M x 36

      48MB         (1) 8M x 36      (1) 4M x 36

      64MB         (1) 16M x 36         None

      64MB         (1) 8M x 36      (1) 8M x 36

      68MB         (1) 16M x 36     (1) 1M x 36

      72MB         (1) 16M x 36     (1) 2M x 36

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

      96MB         (1) 16M x 36     (1) 8M x 36

      128MB        (1) 32M x 36         None

      128MB        (1) 16M x 36     (1) 16M x 36

          DRAM CONFIGURATION (CON'T)

      Size          Bank 0          Bank 1

     132MB        (1) 32M x 36   (1) 1M x 36

     136MB        (1) 32M x 36   (1) 2M x 36

     144MB        (1) 32M x 36   (1) 4M x 36

     160MB        (1) 32M x 36   (1) 8M x 36

     192MB        (1) 32M x 36   (1) 16M x 36

     256MB        (1) 64M x 36       None

     256MB        (1) 32M x 36   (1) 32M x 36

              CACHE CONFIGURATION

      Size          Bank 0           TAG

      64KB        (4) 16K x 8    Unidentified

     128KB        (4) 32K x 8    Unidentified

     256KB        (4) 64K x 8    Unidentified

     512KB        (4) 128K x 8   Unidentified

                         CPU SPEED SELECTION

               Speed                              J28

               25MHz                       Pins 1 & 2 closed

               33MHz                Pins 1 & 2, 3 & 4, 5 & 6 closed

               40MHz                    Pins 1 & 2, 3 & 4 closed

              50iMHz                       Pins 1 & 2 closed

               50MHz                       Pins 5 & 6 closed

              66iMHz                Pins 1 & 2, 3 & 4, 5 & 6 closed

              75iMHz                       Pins 1 & 2 closed

              80iMHz                    Pins 1 & 2, 3 & 4 closed

              100iMHz               Pins 1 & 2, 3 & 4, 5 & 6 closed

              120iMHz                   Pins 1 & 2, 3 & 4 closed

                            CPU TYPE SELECTION

       Type          J6      J7       J12      J13       J14       J15

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

     SL80486SX       1 &    1 & 2    2 & 3,   2 & 3     Open       Open
                      2              4 & 5

     UMC486DX        1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

      AM486DX        1 &    2 & 3    Open     1 & 2,    Open      3 & 4
                      2                       3 & 4

      80486DX        1 &    1 & 2    Open     1 & 2,    Open      3 & 4
                      2                       3 & 4

     SL80486DX       1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

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

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

     TI486DX2        2 &    1 & 2    1 & 2,   1 & 2,    2 & 3     3 & 4
                      3              3 & 4    3 & 4

     UMC486DX2       1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

     AM486DX2        1 &    2 & 3    Open     1 & 2,    Open      3 & 4
                      2                       3 & 4

     80486DX2        1 &    1 & 2    Open     1 & 2,    Open      3 & 4
                      2                       3 & 4

    SL80486DX2       1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

     CX486DX4        2 &    1 & 2    1 & 2,   1 & 2,    2 & 3     3 & 4
                      3              3 & 4    3 & 4

     IBM486DX4       2 &    1 & 2    1 & 2,   1 & 2,    2 & 3     3 & 4
                      3              3 & 4    3 & 4

     AM486DX4        1 &    2 & 3    Open     1 & 2,    Open      3 & 4
                      2                       3 & 4

   (SL)AM486DX4      1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

    SL80486DX4       1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

      CXP24D         2 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      3              4 & 5    3 & 4

       P24D          1 &    1 & 2    2 & 3,   1 & 2,    Open      3 & 4
                      2              4 & 5    3 & 4

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

      CS5X86         1 &    1 & 2    1 & 2,   2 & 3,    Open      3 & 4
                      2              3 & 4    4 & 5

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CON'T)

      Type           J16           J17            J18            J19

    80486SX         1 & 2          Open           Open           Open

   SL80486SX        3 & 4          Open           Open           Open

    UMC486DX        3 & 4          Open           Open           Open

    AM486DX         1 & 2          Open           Open           Open

    80486DX         1 & 2          Open           Open           Open

   SL80486DX        3 & 4          Open           Open           Open

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

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

    TI486DX2        3 & 4         2 & 3          1 & 2          2 & 3

   UMC486DX2        3 & 4          Open           Open           Open

    AM486DX2        1 & 2          Open           Open           Open

    80486DX2        1 & 2          Open           Open           Open

   SL80486DX2       3 & 4          Open           Open           Open

    CX486DX4        3 & 4         2 & 3          1 & 2           Open

   IBM486DX4        3 & 4         2 & 3          1 & 2           Open

    AM486DX4        1 & 2          Open           Open           Open

  (SL)AM486DX4      3 & 4          Open           Open           Open

   SL80486DX4       3 & 4          Open           Open           Open

     CXP24D         3 & 4          Open           Open           Open

      P24D          3 & 4          Open           Open           Open

      P24T        3 & 4, 5 &      1 & 2          2 & 3           Open
                      6

     CS5X86         3 & 4          Open           Open           Open

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CON'T)

      Type          J20        J21        J22         J23         J24

    80486SX        Open       Open        Open       Open         Open

   SL80486SX       1 & 2      Open        Open       1 & 2        Open

    UMC486DX       1 & 2      2 & 3       Open       1 & 2        Open

    AM486DX        Open       Open        Open       Open         Open

    80486DX        Open       Open        Open       Open         Open

   SL80486DX       1 & 2      2 & 3       Open       1 & 2        Open

    CX486DX2       2 & 3      Open        Open       1 & 2        Open

   IBM486DX2       2 & 3      Open        Open       1 & 2        Open

    TI486DX2       2 & 3      Open        Open       1 & 2        Open

   UMC486DX2       1 & 2      2 & 3       Open       1 & 2        Open

    AM486DX2       Open       Open        Open       Open         Open

    80486DX2       Open       Open        Open       Open         Open

   SL80486DX2      1 & 2      2 & 3       Open       1 & 2        Open

    CX486DX4       2 & 3      Open        Open       1 & 2        Open

   IBM486DX4       2 & 3      Open        Open       1 & 2        Open

    AM486DX4       Open       Open        Open       Open         Open

  (SL)AM486DX4     1 & 2      Open       2 & 3       1 & 2       Closed

   SL80486DX4      1 & 2      Open        Open       1 & 2        Open

     CXP24D        1 & 2      Open       2 & 3       1 & 2       Closed

      P24D         1 & 2      2 & 3      2 & 3       1 & 2       Closed

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

     CS5X86        1 & 2      Open       2 & 3       1 & 2       Closed

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CON'T)

      Type           J25            J26            J27           J36

    80486SX          Open          Open           Open          Closed

   SL80486SX         Open          Open           Open           Open

    UMC486DX         Open          Open           Open           Open

    AM486DX          Open          Open           Open          Closed

    80486DX          Open          Open           Open          Closed

   SL80486DX         Open          Open           Open           Open

    CX486DX2         Open          Open           Open           Open

   IBM486DX2         Open          Open           Open           Open

    TI486DX2         Open          Open           Open           Open

   UMC486DX2         Open          Open           Open           Open

    AM486DX2         Open          Open           Open          Closed

    80486DX2         Open          Open           Open          Closed

   SL80486DX2        Open          Open           Open           Open

    CX486DX4         Open          Open          Closed          Open

   IBM486DX4         Open          Open          Closed          Open

    AM486DX4         Open          Open           Open          Closed

  (SL)AM486DX4      Closed        Closed          Open           Open

   SL80486DX4        Open          Open           Open           Open

     CXP24D         Closed        Closed         Closed          Open

      P24D          Closed        Closed          Open           Open

      P24T           Open          Open           Open           Open

     CS5X86         Closed        Closed         Closed          Open

                           CPU VOLTAGE SELECTION

    Voltage          J8             J9            J11            J35

     3.3v         Pins 2 & 3     Pins 2 & 3      Closed       Pins 2 & 3
                   closed         closed                        closed

      4v          Pins 2 & 3     Pins 2 & 3       Open        Pins 2 & 3
                   closed         closed                        closed

      5v          Pins 1 & 2     Pins 1 & 2      Closed       Pins 1 & 2
                   closed         closed                        closed

                    DMA CHANNEL SELECTION

       Channel                J3                  J4

          1            Pins 1 & 2 closed   Pins 1 & 2 closed

          3            Pins 2 & 3 closed   Pins 2 & 3 closed

