UNIDENTIFIED

J-404

Processor        80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Unidentified
Max. Onboard DRAM64MB
Cache            64/128/256KB
BIOS             AMI/Award
Dimensions       250mm x 220mm
I/O Options      None
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J1       Turbo switch              JP13

  Power LED & keylock         J21       Speaker                   JP16

  Turbo LED                   JP12      Reset switch               S1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP1           pins 1 & 2
                                                              closed

  »   Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

  »   Factory configured - do not             JP24             N/A
      alter

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

      32MB        (4) 4M x 9      (4) 4M x 9

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1          U3P            U40

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

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

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

     256KB      (4) 64K x 8        NONE          NONE        (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

     Size           JP3            JP5            JP8            JP9

     64KB        pins 2 & 3     pins 2 & 3        Open           Open
                  closed          closed

    128KB        pins 1 & 2     pins 1 & 2       Closed          Open
                  closed          closed

    256KB        pins 2 & 3     pins 2 & 3       Closed         Closed
                  closed          closed

                          CPU TYPE CONFIGURATION

       Type                JP6               JP7               JP11

      80486SX           pins 2 & 3        pins 2 & 3           Open
                         closed             closed

      80486DX           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

     80486DX2           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

                 CPU SPEED CONFIGURATION

       Speed         JP18      JP19          JP20

       25MHz         Closed    Open         Closed

       33MHz         Closed   Closed         Open

       40MHz         Open      Open         Closed

      50iMHz         Closed    Open         Closed

       50MHz         Open     Closed         Open

      66iMHz         Closed   Closed         Open