
UNIDENTIFIED

3486HN CACHE MAINBOARD

Processor        AM386DX/80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2
Processor Speed  20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         OPTI
Max. Onboard     32MB
DRAM
Cache            64/128/256KB
BIOS             AMI
Dimensions       254mm x 220mm
I/O Options      None
NPU Options      80387DX

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J2       Turbo LED                  J44

  Power LED & keylock         J42       Reset switch               J45

  Turbo switch                J43       Speaker                    J46

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             J3           pins 2 & 3
                                                              closed

      CMOS memory clear                        J3           pins 1 & 2
                                                              closed

     80386 speed select 33MHz                 J4             Closed

      80386 speed select 40MHz                 J4              Open

     Factory configured - do not              J5              N/A
      alter

     Monitor type select color                J6             Closed

      Monitor type select monochrome           J6              Open

     80386 PQFP CPU disabled                 J24             Closed

      80386 PQFP CPU enabled                  J24              Open

     80486 PQFP CPU disabled                 J27             Closed

      80486 PQFP CPU enabled                  J27              Open

              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

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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U29)      TAG (U30)

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

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

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

                        CACHE JUMPER CONFIGURATION

    Size          J34             J36            J37             J38

    64KB          Open         pins 2 & 3        Open           Open
                                closed

   128KB         Closed        pins 1 & 2       Closed          Open
                                closed

   256KB         Closed        pins 2 & 3       Closed         Closed
                                closed

                    CPU TYPE CONFIGURATION

        Type                 J23                  J31

       80386DX         pins 1 & 2 closed          Open

      CX486DLC         pins 1 & 2 closed          Open

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

        CPU TYPE CONFIGURATION

    Type         J25          J26

    Cyrix       Closed      Closed

  AMD/Intel      Open        Open

                          CPU TYPE CONFIGURATION

        Type                J28              J29                J41

   80486SX (PQFP)         Closed          pins 2 & 3           Open
                                            closed

     80486 (PGA)           Open           pins 2 & 3           Open
                                            closed

       80487SX             Open           pins 2 & 3         pins 2 & 3
                                            closed            closed

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

                    CPU TYPE CONFIGURATION

        Type                 J39                  J40

       80386DX         pins 1 & 2 closed   pins 2 & 3 closed

      CX486DLC         pins 1 & 2 closed   pins 2 & 3 closed

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

      80486DX2         pins 2 & 3 closed   pins 2 & 3 closed

  CPU CLOCK SPEED CONFIGURATION

   Speed       J30        J32

   40MHz     Closed      Closed

   50MHz     Closed       Open

   66MHz      Open       Closed

   80MHz      Open        Open

