
TYAN COMPUTER CORPORATION

S1846S (LA)

Device Type            Mainboard, Single board computer
Processor              Pentium II/Celeron
Processor Speed        233/266/300/333/350/400MHz
Chip Set               Intel 440BX
Maximum Onboard Memory 768MB (SDRAM supported)
Audio Chip Set         Ensoniq ES1371
Cache                  0/128/256/512KB (located on the CPU)
BIOS                   AMI
Dimensions             305mm x 244mm
I/O Options            32-bit PCI slots (5), floppy drive interface,
                       game/MIDI port, 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, line in, line out, microphone
                       in, audio in - CD-ROM

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  AGP slot                 AGP         Floppy drive             CN13
                                       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

  Game/MIDI port           CN1         IR connector          J8/pins 6 -
                                                                 10

  Microphone in            CN2         IDE interface LED     J8/pins 13 -
                                                                 16

  Line in                  CN3         Power LED             J8/pins 18 &
                                                                 20

  Line out                 CN4         Reset switch          J8/pins 22 &
                                                                 23

  Serial port 2            CN5         Speaker               J8/pins 24 -
                                                                 27

  Serial port 1            CN6         MPEG connector            J9

  Parallel port            CN7         TDA connector             J10

  USB connector 1          CN8         Audio in - CD-ROM         J11

  USB connector 2          CN9         Video connector           J13

  PS/2 mouse port          CN10        Green PC connector       JP16

  IDE interface 2          CN11        32-bit PCI slots       PC1 - PC5

  IDE interface 1          CN12

                        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

      On board sound enabled               JP17              Open

      On board sound disabled              JP17             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

