UNIDENTIFIED

386 LOCAL-BUS CACHE MAINBOARD

Processor         AM386DX/80386DX/AM486DXL/CX486DLC
Processor Speed   33/40MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        240mm x 221mm
I/O Options       32-bit VESA local bus slot
NPU Options       80387DX/CX487DLC

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  External battery            J1        Turbo switch              JP12

  Power LED & keylock         J18       32-bit VESA local bus     SL1
                                        slot

  Speaker                     J19       Reset switch              SW1

  Turbo LED                  JP11

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP3           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP3           pins 1 & 2
                                                              closed

  »   Monitor type select color               JP4             Closed

      Monitor type select monochrome          JP4              Open

  »   Factory configured - do not             JP7              N/A
      alter

  »   Factory configured - do not             JP14             N/A
      alter

  »   Factory configured - do not             JP15             N/A
      alter

  »   Factory configured - do not             JP16             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

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

      16MB        (4) 4M x 9         NONE

      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      JP8       JP9      JP10      JP17      JP18

   64KB     Open      Open     Open      2 & 3     Open      Open

  128KB     Closed   Closed    Open      1 & 2     Open     Closed

  256KB     Closed   Closed    Closed    2 & 3    Closed    Closed

  Note: Pins designated should be in the closed position.

            CPU TYPE CONFIGURATION

    Type        JP1         JP5        JP13

  AM486DX      Open        Open        Open

  80386DX      Open        Open        Open

  AM386DXL     Open        Open        Open

  CX486DLC    Closed      Closed      Closed

  CPU SPEED CONFIGURATION

    Speed          JP2

    33MHz         Closed

    40MHz          Open