
TYAN COMPUTER CORPORATION

S1856S (LA)

Device Type   Mainboard
Processor     Celeron
Processor     233/266/300/333/350/366/400/433/450/466/500/550/600MHz
Speed
Chip Set      Intel 440BX
Maximum       768MB (EDO supported)
Onboard
Memory
Cache         0/128KB (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-ROMs (2)

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  AGP slot                   AGP       PS/2 mouse port            CN10

  ATX power connector        ATX       IDE interface 2            CN11

  Green PC connector          C1       IDE interface 1            CN12

  Chassis fan power           C2       Floppy drive               CN13
                                       interface

  Chassis fan power           C3       Wake on modem              CON2
                                       connector

  Game/MIDI port             CN1       Wake on LAN connector      CON3

  Microphone in              CN2       Chassis intrusion           J7
                                       connector

  Line in                    CN3       Modem connector            J10

  Line out                   CN4       Audio in - CD-ROM          J11

  Serial port 2              CN5       Audio in - CD-ROM          J13

  Serial port 1              CN6       Front panel connector      J47

  Parallel port              CN7       Speaker                    J48

  USB connector 1            CN8       32-bit PCI slots        PC1 - PC5

  USB connector 2            CN9

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     CMOS memory normal operation          JP2        Pins 1 & 2 closed

      CMOS memory clear                     JP2        Pins 2 & 3 closed

     Factory configured - do not          JP17          Unidentified
      alter

                    DIMM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2

      8MB       (1) 1M x 64        None          None

     16MB       (1) 2M x 64        None          None

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

     24MB       (1) 2M x 64    (1) 1M x 64       None

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

     32MB       (1) 4M x 64        None          None

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

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

     40MB       (1) 4M x 64    (1) 1M x 64       None

     40MB       (1) 2M x 64    (1) 2M x 64    (1) 1M x 64

     48MB       (1) 4M x 64    (1) 1M x 64    (1) 1M x 64

     48MB       (1) 4M x 64    (1) 2M x 64       None

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

     56MB       (1) 4M x 64    (1) 2M x 64    (1) 1M x 64

     64MB       (1) 8M x 64        None          None

     64MB       (1) 4M x 64    (1) 2M x 64    (1) 2M x 64

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

     72MB       (1) 8M x 64    (1) 1M x 64       None

     72MB       (1) 4M x 64    (1) 4M x 64    (1) 1M x 64

                  DIMM CONFIGURATION (CON'T)

      Size          Bank 0          Bank 1          Bank 2

      80MB        (1) 8M x 64     (1) 1M x 64    (1) 1M x 64

      80MB        (1) 8M x 64     (1) 2M x 64        None

      80MB        (1) 4M x 64     (1) 4M x 64    (1) 2M x 64

      88MB        (1) 8M x 64     (1) 2M x 64    (1) 1M x 64

      96MB        (1) 8M x 64     (1) 2M x 64    (1) 2M x 64

      96MB        (1) 8M x 64     (1) 4M x 64        None

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

     104MB        (1) 8M x 64     (1) 4M x 64    (1) 1M x 64

     112MB        (1) 8M x 64     (1) 4M x 64    (1) 2M x 64

     128MB       (1) 16M x 64        None            None

     128MB        (1) 8M x 64     (1) 4M x 64    (1) 4M x 64

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

     136MB       (1) 16M x 64     (1) 1M x 64        None

     136MB        (1) 8M x 64     (1) 8M x 64    (1) 1M x 64

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

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

     144MB        (1) 8M x 64     (1) 8M x 64    (1) 2M x 64

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

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

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

     200MB       (1) 16M x 64     (1) 8M x 64    (1) 1M x 64

     208MB       (1) 16M x 64     (1) 8M x 64    (1) 2M x 64

     224MB       (1) 16M x 64     (1) 8M x 64    (1) 4M x 64

     256MB       (1) 32M x 64        None            None

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

     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 EDO memory.

                           CACHE CONFIGURATION

            Note: 128KB cache is located on the Celeron 300A & 333 CPU.

                            CPU SPEED SELECTION

    CPU      Clock    Multiplier     JP10      JP11      JP12      JP13
  speed     speed

  300MHz    66MHz        4.5x        Open     Closed     Open     Closed

  333MHz    66MHz         5x         Open      Open     Closed    Closed

  350MHz    100MHz       3.5x       Closed     Open      Open     Closed

  366MHz    66MHz        5.5x        Open      Open      Open     Closed

  400MHz    100MHz        4x         Open     Closed    Closed    Closed

  400MHz    66MHz         6x         Open     Closed    Closed     Open

  433MHz    66MHz        6.5x       Closed    Closed     Open      Open

  450MHz    100MHz       4.5x        Open     Closed     Open     Closed

  466MHz    66MHz         7x        Closed     Open     Closed     Open

  500MHz    100MHz        5x         Open      Open     Closed    Closed

  550MHz    100MHz       5.5x        Open      Open      Open     Closed

  600MHz    100MHz        6x        Closed    Closed    Closed     Open

           BUS SPEED SELECTION

        Speed                JP1

     Auto detect      Pins 1 & 2 closed

        66MHz         Pins 2 & 3 closed

       100MHz                Open

