SEANIX TECHNOLOGY, INC.

YUKON SYSTEM BOARD

Processor              Pentium
Processor Speed        75/90/100/120/133MHz
Chip Set               SIS
Maximum Onboard Memory 128MB
Cache                  256/512/1024KB
BIOS                   Award
Dimensions             330mm x 218mm
I/O Options            32-bit PCI slots (4), floppy drive interface, IDE
                       interfaces (2), parallel port, serial port, serial
                       port/IRDA, VGA feature connector, VRM connector,
                       cache slot, IR connector, VGA - TV - PS/2 out
                       connector, audio - MIDI connector, CD-ROM audio
                       cable connector, wavetable connector
NPU Options            None

[Image]

                                CONNECTIONS

        Function           Label            Function             Label

  Serial port 2/IRDA        CN1        IDE interface LED          HD1

  Serial port 1             CN2        Power LED & keylock        J1

  VGA - TV - PS/2 out       CN3        CD-ROM audio               J2
  connector                            connector

  Parallel port             CN4        Reset switch               J3

  Floppy drive              CN5        Turbo LED                 JP20
  interface

  IDE interface 1           CN6        Turbo switch              JP21

  IDE interface 2           CN7        Speaker                   JP22

  VGA feature               CN8        IR connector              JP36
  connector

  VRM connector             CN9        32-bit PCI slots        PC1 - PC4

  Audio/MIDI cable          CN10       Cache slot                 SL1
  connector

  Wavetable upgrade         CN11
  connector

                        USER CONFIGURABLE SETTINGS

                 Setting                      Label          Position

  »   L1 cache always invalidated              JP5           Pins 1 & 2
                                                              closed

      L1 cache invalidated on write only       JP5           Pins 2 & 3
                                                              closed

  »   Serial port 2 used for IRDA              JP10          Pins 1 & 2
                                                              closed

      Serial port 2 used for COM2              JP10          Pins 2 & 3
                                                              closed

  »   Pipeline mode enabled                    JP14          Pins 2 & 3
                                                              closed

      Pipeline mode disabled                   JP14          Pins 1 & 2
                                                              closed

  »   Cache type select asynchronous           JP15          Pins 1 & 2
                                                              closed

      Cache type select synchronous            JP15          Pins 2 & 3
                                                              closed

  »   PCI bus clock speed select 33MHz         JP18            Open

      PCI bus clock speed select               JP18           Closed
      CPUCLK/2

  »   VGA shared memory enabled                JP24           Closed

      VGA shared memory disabled               JP24            Open

  »   Parallel port IRQ select IRQ7            JP37          Pins 1 & 2
                                                              closed

      Parallel port IRQ select IRQ5            JP37          Pins 2 & 3
                                                              closed

  Note: The location of jumpers JP24 & JP37 are unidentified.

                       DRAM

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

       4MB        (2) 256K x 36    (2) 256K x 36

       6MB        (2) 256K x 36    (2) 512K x 36

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB        (2) 256K x 36     (2) 1M x 36

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

      16MB         (2) 2M x 36          None

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

                   DRAM (CON’T)

      Size            Bank 0           Bank 1

      18MB        (2) 256K x 36     (2) 2M x 36

      20MB        (2) 512K x 36     (2) 2M x 36

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

      32MB         (2) 4M x 36          None

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

      34MB        (2) 256K x 36     (2) 4M x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 1M x 36      (2) 4M x 36

      48MB         (2) 2M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      66MB        (2) 256K x 36     (2) 8M x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 1M x 36      (2) 8M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      96MB         (2) 4M x 36      (2) 8M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

  Note: Board accepts EDO memory.

                            CACHE SIZE

              Size                              SL1

              256KB                          Installed

              512KB                          Installed

               1MB                           Installed

  Note: Only one cache module can be installed at any one time.

           CPU SPEED

  Setting     JP17      JP19

   75MHz     Closed    Closed

   90MHz      Open     Closed

  100MHz     Closed     Open

  120MHz      Open     Closed

  133MHz     Closed     Open

                        CPU MULTIPLIER

       Setting               JP6                  JP7

        1.5x           Pins 1 & 2 closed   Pins 1 & 2 closed

         2x            Pins 2 & 3 closed   Pins 1 & 2 closed

        2.5x           Pins 1 & 2 closed   Pins 2 & 3 closed

         3x            Pins 2 & 3 closed   Pins 2 & 3 closed

  Note: The location of the above jumpers are unidentified.

               MISCELLANEOUS TECHNICAL NOTE

  The location of pin 1 on all jumpers is unidentified.