SEANIX TECHNOLOGY, INC.

SB-SYM-486C

Processor         80486SX/80486DX
Processor Speed   16/20/25/33/50MHz
Chip Set          Symphony
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose               Location

  Power LED &              J19         Turbo switch        J21 (pins 3 &
  keylock                                                       4)

  Speaker                  J20         Reset switch             J22

  Turbo LED            J21 (pins 1 &
                            2)

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color                W2           pins 1 & 2
                                                              closed

      Monitor type select monochrome           W2           pins 2 & 3
                                                              closed

  »   Factory configured - do not              W3              Open
      alter

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

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

      3MB         (4) 1M x 9         NONE

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

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

      5MB         (4) 4M x 9         NONE

      6MB         (4) 4M x 9     (4) 256K x 9

      7MB         (4) 4M x 9      (4) 1M x 9

      8MB         (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       W4        W5         W6        W7        W8

   64KB      2 & 3     Open      1 & 2     1 & 2     2 & 3

  128KB      1 & 2     1 & 2     1 & 2     1 & 2     1 & 2

  256KB      2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

             CACHE JUMPER CONFIGURATION (CON’T)

   Size       W9        W15       W17       W19       W20

   64KB      1 & 2     2 & 3     2 & 3     2 & 3     2 & 3

  128KB      2 & 3     1 & 2     1 & 2     1 & 2     1 & 2

  256KB      2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                    CACHE JUMPER CONFIGURATION (CON’T)

               Setting                                 W21

  Cache installed (shows size at boot           pins 1 & 2 closed
                 up)

  Cache installed (does not show size           pins 1 & 2 closed
             at boot up)

         Cache not installed                    pins 2 & 3 closed

                          CPU TYPE CONFIGURATION

       Type               W13               W14                W18

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

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

                  CPU SPEED CONFIGURATION

  Speed       W1        W10       W11       W12       W16

  16MHz      1 & 2     1 & 2     2 & 3     2 & 3     2 & 3

  20MHz      1 & 2     1 & 2     2 & 3     2 & 3     2 & 3

  25MHz      1 & 2     1 & 2     2 & 3     2 & 3     2 & 3

  33MHz      1 & 2     1 & 2     2 & 3     2 & 3     2 & 3

  50MHz      2 & 3     2 & 3     1 & 2     1 & 2     1 & 2

  Note: Pins designated should be in the closed position.