
TYAN COMPUTER CORPORATION

S1846S

Device Type            Mainboard
Processor              Pentium II/Celeron
Processor Speed        233/266/300/333/350/400MHz
Chip Set               Intel 440BX
Maximum Onboard Memory 768MB (SDRAM supported)
Cache                  0/128/256/512KB (located on CPU)
BIOS                   AMI
Dimensions             305mm x 244mm
I/O Options            32-bit PCI slots (5), floppy drive interface, green
                       PC connector, IDE interfaces (2), parallel port,
                       PS/2 mouse port, serial ports (2), IR connector, USB
                       connectors (2), ATX power connector, AGP slot

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  AGP slot                 AGP         Floppy drive              CN9
                                       interface

  ATX power                ATX         Wake on LAN              CON3
  connector                            connector

  Chassis fan power         C1         Chassis intrusion         J7
                                       connector

  Chassis fan power         C2         Soft off power       J8/pins 1 & 2
                                       supply

  Chassis fan power         C3         Green PC connector   J8/pins 3 & 4

  Serial port 2            CN1         IR connector          J8/pins 6 -
                                                                 10

  Serial port 1            CN2         IDE interface LED     J8/pins 13 -
                                                                 16

  Parallel port            CN3         Power LED             J8/pins 18 &
                                                                 20

  USB connector 1          CN4         Reset switch          J8/pins 22 &
                                                                 23

  USB connector 2          CN5         Speaker               J8/pins 24 -
                                                                 27

  PS/2 mouse port          CN6         Green PC connector       JP16

  IDE interface 2          CN7         32-bit PCI slots       PC1 - PC5

  IDE interface 1          CN8

                         USER CONFIGURABLE SETTINGS

                Function                   Label            Position

     Factory configured - do not           CON2          Unidentified
      alter

     CMOS memory normal operation          JP2        Pins 1 & 2 closed

      CMOS memory clear                     JP2        Pins 2 & 3 closed

                      DIMM CONFIGURATION

      Size          Bank 0          Bank 1          Bank 2

      8MB         (1) 1M x 64        None            None

      16MB        (1) 1M x 64     (1) 1M x 64        None

      16MB        (1) 2M x 64        None            None

      24MB        (1) 1M x 64     (1) 1M x 64    (1) 1M x 64

      32MB        (1) 2M x 64     (1) 2M x 64        None

      32MB        (1) 4M x 64        None            None

      48MB        (1) 2M x 64     (1) 2M x 64    (1) 2M x 64

      64MB        (1) 4M x 64     (1) 4M x 64        None

      64MB        (1) 8M x 64        None            None

      96MB        (1) 4M x 64     (1) 4M x 64    (1) 4M x 64

     128MB        (1) 8M x 64     (1) 8M x 64        None

     128MB       (1) 16M x 64        None            None

                        DIMM CONFIGURATION (CON'T)

          Size               Bank 0          Bank 1           Bank 2

         164MB            (1) 16M x 64    (1) 1M x 64          None

         144MB            (1) 16M x 64    (1) 1M x 64      (1) 1M x 64

         144MB            (1) 16M x 64    (1) 2M x 64          None

         160MB            (1) 16M x 64    (1) 2M x 64      (1) 2M x 64

         160MB            (1) 16M x 64    (1) 4M x 64          None

         192MB            (1) 16M x 64    (1) 4M x 64      (1) 4M x 64

         192MB            (1) 16M x 64    (1) 8M x 64          None

         192MB            (1) 8M x 64     (1) 8M x 64      (1) 8M x 64

         256MB            (1) 16M x 64    (1) 8M x 64      (1) 8M x 64

         256MB            (1) 16M x 64    (1) 16M x 64         None

         256MB            (1) 32M x 64        None             None

         264MB            (1) 32M x 64    (1) 1M x 64          None

         272MB            (1) 32M x 64    (1) 1M x 64      (1) 1M x 64

         272MB            (1) 32M x 64    (1) 2M x 64          None

         288MB            (1) 32M x 64    (1) 2M x 64      (1) 2M x 64

         288MB            (1) 32M x 64    (1) 4M x 64          None

         320MB            (1) 32M x 64    (1) 4M x 64      (1) 4M x 64

         320MB            (1) 32M x 64    (1) 8M x 64          None

         384MB            (1) 32M x 64    (1) 8M x 64      (1) 8M x 64

         384MB            (1) 32M x 64    (1) 16M x 64         None

         384MB            (1) 16M x 64    (1) 16M x 64     (1) 16M x 64

         512MB            (1) 32M x 64    (1) 16M x 64     (1) 16M x 64

         512MB            (1) 32M x 64    (1) 32M x 64         None

         768MB            (1) 32M x 64    (1) 32M x 64     (1) 32M x 64

  Note: Board accepts SDRAM memory.

                            CACHE CONFIGURATION

  Note: 256KB/512KB cache is located on the Pentium II CPU. 128KB cache
  is located on the Celeron 300A & 333 CPU.

                            CPU SPEED SELECTION

    CPU      Clock    Multiplier     JP10      JP11      JP12      JP13
  speed     speed

  233MHz    66MHz        3.5x       Closed     Open      Open     Closed

  266MHz    66MHz         4x         Open     Closed    Closed    Closed

  300MHz    66MHz        4.5x        Open     Closed     Open     Closed

  300MHz    100MHz        3x        Closed     Open     Closed    Closed

  333MHz    66MHz         5x         Open      Open     Closed    Closed

  350MHz    100MHz       3.5x       Closed     Open      Open     Closed

  400MHz    100MHz        4x         Open     Closed    Closed    Closed

                         FLOPPY DRIVE/IR SELECTION

      Setting              JP4               JP7                JP8

  2 floppy drives        Closed          Pins 2 & 3         Pins 1 & 2
                                           closed             closed

   1 floppy, 1 IR         Open           Pins 1 & 2         Pins 2 & 3
                                           closed             closed

