TYAN COMPUTER CORPORATION

S1894SLA (ZX)

Device Type          Mainboard
Processor            Pentium II/Celeron
Processor Speed      233/266/300/333/350/400/450MHz
Chip Set             Intel 440ZX
Maximum Onboard      256MB (SDRAM supported)
Memory
Audio Chip Set       Ensoniq
Cache                0/128/256/512KB (located on the CPU)
BIOS                 Award
Dimensions           305mm x 244mm
I/O Options          32-bit PCI slots (3), 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), wake on LAN connector

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose               Location

  AGP slot                 AGP         IDE interface 2         CN11

  ATX power                ATX         IDE interface 1         CN12
  connector

  Chassis fan power         C1         Floppy drive            CN13
                                       interface

  Chassis fan power         C2         Wake on LAN             CON3
                                       connector

  Chassis fan power         C3         Chassis                  J7
                                       intrusion

  Game/MIDI port           CN1         IDE interface       J10/pins 1 -3
                                       LED

  Microphone in            CN2         Power LED          J10/pins 2 & 4

  Line in                  CN3         Reset switch        J10/pins 5 & 7
                                                             or 7 & 8

  Line out                 CN4         Soft off power     J10/pins 6 & 8,
                                       supply                  5 & 6

  Serial port 2            CN5         Audio in –               J11
                                       CD-ROM

  Serial port 1            CN6         Audio in –               J13
                                       CD-ROM

  Parallel port            CN7         Speaker                  J16

  USB connector 1          CN8         Green PC                JP16
                                       connector

  USB connector 2          CN9         Power fan power         JP23

  PS/2 mouse port          CN10        32-bit PCI slots      PC1 – PC3

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   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

  »   Factory configured - do not          JP22          Unidentified
      alter

              DIMM CONFIGURATION

      Size          Bank 0          Bank 1

      8MB         (1) 1M x 64        None

      16MB        (1) 2M x 64        None

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

      24MB        (1) 2M x 64    (1) 1M x 64

      32MB        (1) 4M x 64        None

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

      40MB        (1) 4M x 64    (1) 1M x 64

      48MB        (1) 4M x 64    (1) 2M x 64

      64MB        (1) 8M x 64        None

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

      72MB        (1) 8M x 64    (1) 1M x 64

      80MB        (1) 8M x 64    (1) 2M x 64

      96MB        (1) 8M x 64    (1) 4M x 64

     128MB        (1) 16M x 64       None

           DIMM CONFIGURATION (CON’T)

      Size          Bank 0          Bank 1

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

     136MB       (1) 16M x 64     (1) 1M x 64

     144MB       (1) 16M x 64     (1) 2M x 64

     160MB       (1) 16M x 64     (1) 4M x 64

     192MB       (1) 16M x 64     (1) 8M x 64

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

  333MHz    66MHz         5x         Open      Open     Closed    Closed

  350MHz    100MHz       3.5x       Closed     Open      Open     Closed

  400MHz    100MHz        4x         Open     Closed    Closed    Closed

  450MHz    100MHz       4.5x        Open     Closed     Open     Closed