
SEANIX TECHNOLOGY, INC.

S801

Processor  80486SX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   OPTI
Max.       64MB
Onboard
DRAM
Cache      64/128/256KB
BIOS       AMI/ASI
Dimensions 330mm x 218mm
I/O        32-bit VESA local bus slots (2)
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Power LED & keylock         J19       Turbo LED                 JP16

  Turbo switch               JP14       Reset switch               S1

  Speaker                    JP15       32-bit VESA local      SL1 & SL2
                                        bus slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     ASI password enabled                    JP3             Closed

      ASI password disabled                   JP3              Open

     Flash BIOS write protect                JP4           pins 2 & 3
      disabled                                                closed

      Flash BIOS write protect enabled        JP4           pins 1 & 2
                                                              closed

     Flash voltage select 5v                 JP27          pins 1 & 2
                                                              closed

      Flash voltage select 12v                JP27          pins 2 & 3
                                                              closed

     ASI/MR BIOS                             JP36             Open

      AMI w/MEGAKEY keyboard control &        JP36            Closed
      CMOS memory clear

     Local ready delay enabled               JP37          pins 1 & 2
                                                              closed

      Local ready = CPU ready enabled         JP37          pins 2 & 3
                                                              closed

     CMOS memory normal operation            JP38             Open

      CMOS memory clear                       JP38            Closed

     Factory configured - do not             JP41             Open
      alter

     Factory configured - do not             JP42          pins 1 & 2
      alter                                                   closed

     Factory configured - do not             JP43             Open
      alter

     Factory configured - do not             JP45          pins 1 & 2
      alter                                                   closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       2MB        (1) 512K x 36         NONE            NONE

       4MB        (1) 512K x 36    (1) 512K x 36        NONE

       4MB         (1) 1M x 36          NONE            NONE

       6MB        (1) 512K x 36    (1) 512K x 36    (1) 512K x 36

       6MB        (1) 512K x 36     (1) 1M x 36         NONE

       8MB         (1) 1M x 36      (1) 1M x 36         NONE

       8MB         (1) 2M x 36          NONE            NONE

      10MB        (1) 512K x 36     (1) 2M x 36         NONE

      12MB         (1) 1M x 36      (1) 1M x 36      (1) 1M x 36

      12MB         (1) 1M x 36      (1) 2M x 36         NONE

      12MB        (1) 512K x 36    (1) 512K x 36     (1) 2M x 36

      14MB        (1) 512K x 36     (1) 1M x 36      (1) 2M x 36

      16MB         (1) 2M x 36      (1) 2M x 36         NONE

      16MB         (1) 1M x 36      (1) 1M x 36      (1) 2M x 36

      16MB         (1) 4M x 36          NONE            NONE

      18MB        (1) 512K x 36     (1) 2M x 36      (1) 2M x 36

      20MB         (1) 1M x 36      (1) 4M x 36         NONE

      20MB         (1) 1M x 36      (1) 2M x 36      (1) 2M x 36

      24MB         (1) 2M x 36      (1) 2M x 36      (1) 2M x 36

      24MB         (1) 1M x 36      (1) 1M x 36      (1) 4M x 36

      32MB         (1) 2M x 36      (1) 2M x 36      (1) 4M x 36

      32MB         (1) 8M x 36          NONE            NONE

      32MB         (1) 4M x 36      (1) 4M x 36         NONE

      40MB         (1) 1M x 36      (1) 1M x 36      (1) 8M x 36

      48MB         (1) 2M x 36      (1) 2M x 36      (1) 8M x 36

                  DRAM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1          Bank 2

      48MB        (1) 4M x 36     (1) 4M x 36    (1) 4M x 36

      64MB        (1) 8M x 36     (1) 8M x 36        NONE

      64MB        (1) 4M x 36     (1) 4M x 36    (1) 8M x 36

      64MB       (1) 16M x 36        NONE            NONE

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U1)       TAG (U2)

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

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

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

                        CACHE JUMPER CONFIGURATION

    Size          JP11            JP13           JP25           JP26

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

   128KB       pins 1 & 2      pins 1 & 2        Open          Closed
                 closed          closed

   256KB       pins 2 & 3      pins 2 & 3       Closed         Closed
                 closed          closed

                 CPU TYPE CONFIGURATION

            Type                       JP20

          80486SX                pins 1 & 2 closed

          80486DX            pins 1 & 2, 3 & 4 closed

          80486DX2           pins 1 & 2, 3 & 4 closed

          80486DX4           pins 1 & 2, 3 & 4 closed

     Pentium Overdrive       pins 1 & 2, 3 & 4 closed

                          CPU SPEED CONFIGURATION

       Speed              JP5               JP6                JP7

       25MHz              Open             Open         pins 1 & 2 closed

       33MHz             Closed            Open         pins 1 & 2 closed

       40MHz              Open            Closed        pins 1 & 2 closed

      50iMHz              Open             Open         pins 1 & 2 closed

       50MHz             Closed           Closed        pins 1 & 2 closed

      66iMHz             Closed            Open         pins 1 & 2 closed

      75iMHz              Open             Open         pins 2 & 3 closed

      100iMHz            Closed            Open         pins 2 & 3 closed

  CPU CLOCK SPEED CONFIGURATION (80486DX4)

        Speed                  JP39

          1x                   Open

          2x             pins 1 & 2 closed

          3x             pins 2 & 3 closed

            CPU VOLTAGE CONFIGURATION

  Speed      JP9      JP10      JP34      JP35

   3.3v      Open     Open      Open      Open

   5.0v     Closed   Closed    Closed    Closed

  VESA WAIT STATE CONFIGURATION

   Wait states         JP23

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP24

   <= 33MHz        Open

   > 33MHz        Closed

