
UNIDENTIFIED

80486 DX CACHE

Processor         80486SX/80487SX/80486DX
Processor Speed   16/20/25/33MHz
Chip Set          Symphony
Max. Onboard DRAM 32MB
SRAM Cache        64/128/256KB
BIOS              AMI/DTK
Dimensions        330.2mm x 218.4mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J2       Reset switch                J5

  Turbo switch                J3       Speaker                     J6

  Turbo LED                   J4       Power LED & keylock         J7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             JP1           pins 1 & 2
                                                              closed

      CMOS memory clear                        JP1           pins 2 & 3
                                                              closed

     Monitor type select monochrome           JP2             open

      Monitor type select color                JP2            closed

                            CPU CONFIGURATION

    CPU             JP8                  JP9                 JP10

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

  80486SX    pins 2 & 3 closed    pins 2 & 3 closed    pins 2 & 3 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) 1M x 9     (4) 256K x 9

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      17MB        (4) 256K x 9    (4) 4M x 9

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

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

                         SRAM JUMPER CONFIGURATION

      Jumper             64KB              128KB              256KB

       JP3            pins 1 & 2         pins 1 & 2         pins 1 & 2
                        closed            closed             closed

       JP4            pins 1 & 2           open             pins 2 & 3
                        closed                               closed

       JP5            pins 2 & 3           open             pins 2 & 3
                        closed                               closed

       JP6               open             closed              open

       JP7               open             closed              open

       JP11           pins 1 & 2         pins 2 & 3         pins 2 & 3
                        closed            closed             closed

       JP12           pins 1 & 2         pins 1 & 2         pins 2 & 3
                        closed            closed             closed

       JP13           pins 1 & 2         pins 1 & 2         pins 1 & 2
                        closed            closed             closed

       JP14           pins 1 & 2         pins 1 & 2         pins 1 & 2
                        closed            closed             closed

       JP15           pins 2 & 3         pins 1 & 2         pins 2 & 3
                        closed            closed             closed

       JP16           pins 1 & 2         pins 2 & 3         pins 1 & 2
                        closed            closed             closed

       JP17           pins 1 & 2         pins 2 & 3         pins 1 & 2
                        closed            closed             closed

       JP18           pins 2 & 3         pins 1 & 2         pins 2 & 3
                        closed            closed             closed

             SRAM CONFIGURATION

     Size          Bank 0        Bank 1

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

     128KB       (4) 32K x 8      NONE

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


