
UNIDENTIFIED

ISA-486

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed  16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Unidentified
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       254mm x 220mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Turbo LED                  JP10      External battery           JP17

  Speaker                    JP11      Turbo switch               JP32

  Power LED & keylock        JP13      32-bit VESA local bus   SL1 & SL2
                                       slots

  Reset switch               JP15

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             ID2             Closed
      alter

     Factory configured - do not             JP1              Open
      alter

     Factory configured - do not             JP9           pins 1 & 2
      alter                                                   closed

     Monitor type select color               JP12            Closed

      Monitor type select monochrome          JP12             Open

     CMOS memory normal operation            JP16          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP16          pins 2 & 3
                                                              closed

     Factory configured - do not             JP29          pins 1 & 2
      alter                                                   closed

     Factory configured - do not            JP100             Open
      alter

     Factory configured - do not            JP101             Open
      alter

     Factory configured - do not            JP102          pins 2 & 3
      alter                                                   closed

              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          TAG

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

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

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

                        CACHE JUMPER CONFIGURATION

      Size               JP6               JP7                 JP8

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

      128KB           pins 2 & 3        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

      256KB           pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

                          CPU TYPE CONFIGURATION

       Type             JP2           JP3           JP4           JP5

     80486SX         pins 1 & 2      Open          Open          Open
                      closed

     80487SX         pins 2 & 3     Closed       pins 1 & 2     Closed
                      closed                      closed

   80486DX/DX2       pins 2 & 3     Closed       pins 2 & 3      Open
                      closed                      closed

         CPU SPEED CONFIGURATION

        Speed                JP30

        16MHz         pins 2 & 3 closed

        20MHz         pins 2 & 3 closed

        25MHz         pins 2 & 3 closed

        33MHz         pins 1 & 2 closed

       50iMHz         pins 2 & 3 closed

        50MHz         pins 1 & 2 closed

       66iMHz         pins 1 & 2 closed

  BUS SPEED CONFIGURATION

  CPU speed        ID3

   <= 33MHz        Open

   > 33MHz        Closed

