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       # TYAN COMPUTER CORPORATION
       
          S1452 REV. 1.0
       
          Processor    Pentium                                           
          Processor    90/100MHz                                         
          Speed        
          Chip Set     Intel                                             
          Max. Onboard 192MB                                             
          DRAM         
          Cache        256/512KB                                         
          BIOS         Award                                             
          Dimensions   330mm x 218mm                                     
          I/O Options  32-bit PCI bus slots (4), 32-bit VESA local bus   
                       slots (2)                                         
          NPU Options  None                                              
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose       | Location | Purpose              | Location |
          |---------------+----------+----------------------+----------|
          | Turbo LED     |   J10    | Reset switch         |   J19    |
          |---------------+----------+----------------------+----------|
          | Power LED &   |   J12    | IRQ legacy connector |   J31    |
          | keylock       |          |                      |          |
          |---------------+----------+----------------------+----------|
          | Turbo switch  |   J14    | 32-bit PCI bus slots |  PC1 -   |
          |               |          |                      |   PC4    |
          |---------------+----------+----------------------+----------|
          | Speaker       |   J18    | 32-bit VESA Local    |  SL1 &   |
          |               |          | bus slots            |   SL2    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Flash BIOS voltage select 5 volt |  J15   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Flash BIOS voltage select 12     |  J15   | pins 1 & 2 |
          |   | volt                             |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
          |------------+---------------+---------------+---------------|
          |    2MB     | (2) 256K x 36 |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |    4MB     | (2) 256K x 36 | (2) 256K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    4MB     | (2) 512K x 36 |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |    6MB     | (2) 256K x 36 | (2) 256K x 36 | (2) 256K x 36 |
          |------------+---------------+---------------+---------------|
          |    6MB     | (2) 512K x 36 | (2) 256K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    6MB     | (2) 256K x 36 | (2) 512K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    8MB     | (2) 512K x 36 | (2) 256K x 36 | (2) 256K x 36 |
          |------------+---------------+---------------+---------------|
          |    8MB     | (2) 512K x 36 | (2) 512K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    8MB     |  (2) 1M x 36  |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |    10MB    |  (2) 1M x 36  | (2) 256K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    10MB    | (2) 256K x 36 | (2) 512K x 36 | (2) 512K x 36 |
          |------------+---------------+---------------+---------------|
          |    10MB    | (2) 256K x 36 |  (2) 1M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    12MB    |  (2) 1M x 36  | (2) 256K x 36 | (2) 256K x 36 |
          |------------+---------------+---------------+---------------|
          |    12MB    |  (2) 1M x 36  | (2) 512K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    12MB    | (2) 512K x 36 | (2) 512K x 36 | (2) 512K x 36 |
          |------------+---------------+---------------+---------------|
          |    12MB    | (2) 512K x 36 |  (2) 1M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    16MB    |  (2) 1M x 36  | (2) 512K x 36 | (2) 512K x 36 |
          |------------+---------------+---------------+---------------|
          |    16MB    |  (2) 1M x 36  |  (2) 1M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    16MB    |  (2) 2M x 36  |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |    18MB    | (2) 256K x 36 |  (2) 1M x 36  |  (2) 1M x 36  |
          |------------+---------------+---------------+---------------|
          |    18MB    |  (2) 2M x 36  | (2) 256K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    18MB    | (2) 256K x 36 |  (2) 2M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    20MB    | (2) 512K x 36 |  (2) 1M x 36  |  (2) 1M x 36  |
          |------------+---------------+---------------+---------------|
          |    20MB    | (2) 512K x 36 |  (2) 2M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    20MB    |  (2) 2M x 36  | (2) 256K x 36 | (2) 256K x 36 |
          |------------+---------------+---------------+---------------|
          |    20MB    |  (2) 2M x 36  | (2) 512K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    24MB    |  (2) 2M x 36  | (2) 512K x 36 | (2) 512K x 36 |
          |------------+---------------+---------------+---------------|
          |    24MB    |  (2) 2M x 36  |  (2) 1M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    24MB    |  (2) 1M x 36  |  (2) 2M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    32MB    |  (2) 2M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
          |------------+---------------+---------------+---------------|
          |    32MB    |  (2) 2M x 36  |  (2) 2M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    32MB    |  (2) 4M x 36  |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |    34MB    |  (2) 4M x 36  | (2) 256K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    34MB    | (2) 256K x 36 |  (2) 2M x 36  |  (2) 2M x 36  |
          |------------+---------------+---------------+---------------|
          |    34MB    | (2) 256K x 36 |  (2) 4M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    36MB    |  (2) 4M x 36  | (2) 256K x 36 | (2) 256K x 36 |
          |------------+---------------+---------------+---------------|
          |    36MB    |  (2) 4M x 36  | (2) 512K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    36MB    | (2) 512K x 36 |  (2) 2M x 36  |  (2) 2M x 36  |
          |------------+---------------+---------------+---------------|
          |    36MB    | (2) 512K x 36 |  (2) 4M x 36  |     NONE      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM CONFIGURATION (CON’T)                 |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
          |------------+---------------+---------------+---------------|
          |    40MB    |  (2) 4M x 36  | (2) 512K x 36 | (2) 512K x 36 |
          |------------+---------------+---------------+---------------|
          |    40MB    |  (2) 4M x 36  |  (2) 1M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    40MB    |  (2) 1M x 36  |  (2) 2M x 36  |  (2) 2M x 36  |
          |------------+---------------+---------------+---------------|
          |    40MB    |  (2) 1M x 36  |  (2) 4M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    48MB    |  (2) 4M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
          |------------+---------------+---------------+---------------|
          |    48MB    |  (2) 4M x 36  |  (2) 2M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    48MB    |  (2) 2M x 36  |  (2) 2M x 36  |  (2) 2M x 36  |
          |------------+---------------+---------------+---------------|
          |    48MB    |  (2) 2M x 36  |  (2) 4M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    64MB    |  (2) 4M x 36  |  (2) 2M x 36  |  (2) 2M x 36  |
          |------------+---------------+---------------+---------------|
          |    64MB    |  (2) 4M x 36  |  (2) 4M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    64MB    |  (2) 8M x 36  |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |    66MB    |  (2) 8M x 36  | (2) 256K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    66MB    | (2) 256K x 36 |  (2) 4M x 36  |  (2) 4M x 36  |
          |------------+---------------+---------------+---------------|
          |    66MB    | (2) 256K x 36 |  (2) 8M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    68MB    | (2) 512K x 36 |  (2) 4M x 36  |  (2) 4M x 36  |
          |------------+---------------+---------------+---------------|
          |    68MB    | (2) 512K x 36 |  (2) 8M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    68MB    |  (2) 8M x 36  | (2) 256K x 36 | (2) 256K x 36 |
          |------------+---------------+---------------+---------------|
          |    68MB    |  (2) 8M x 36  | (2) 512K x 36 |     NONE      |
          |------------+---------------+---------------+---------------|
          |    72MB    |  (2) 8M x 36  | (2) 512K x 36 | (2) 512K x 36 |
          |------------+---------------+---------------+---------------|
          |    72MB    |  (2) 8M x 36  |  (2) 1M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    72MB    |  (2) 1M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
          |------------+---------------+---------------+---------------|
          |    72MB    |  (2) 1M x 36  |  (2) 8M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    80MB    |  (2) 8M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
          |------------+---------------+---------------+---------------|
          |    80MB    |  (2) 8M x 36  |  (2) 2M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    80MB    |  (2) 2M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
          |------------+---------------+---------------+---------------|
          |    80MB    |  (2) 2M x 36  |  (2) 8M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    96MB    |  (2) 4M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
          |------------+---------------+---------------+---------------|
          |    96MB    |  (2) 4M x 36  |  (2) 8M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    96MB    |  (2) 8M x 36  |  (2) 2M x 36  |  (2) 2M x 36  |
          |------------+---------------+---------------+---------------|
          |    96MB    |  (2) 8M x 36  |  (2) 4M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |   128MB    |  (2) 8M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
          |------------+---------------+---------------+---------------|
          |   128MB    |  (2) 8M x 36  |  (2) 8M x 36  |     NONE      |
          |------------+---------------+---------------+---------------|
          |   130MB    | (2) 256K x 36 |  (2) 8M x 36  |  (2) 8M x 36  |
          |------------+---------------+---------------+---------------|
          |   132MB    | (2) 512K x 36 |  (2) 8M x 36  |  (2) 8M x 36  |
          |------------+---------------+---------------+---------------|
          |   136MB    |  (2) 1M x 36  |  (2) 8M x 36  |  (2) 8M x 36  |
          |------------+---------------+---------------+---------------|
          |   144MB    |  (2) 2M x 36  |  (2) 8M x 36  |  (2) 8M x 36  |
          |------------+---------------+---------------+---------------|
          |   160MB    |  (2) 4M x 36  |  (2) 8M x 36  |  (2) 8M x 36  |
          |------------+---------------+---------------+---------------|
          |   192MB    |  (2) 8M x 36  |  (2) 8M x 36  |  (2) 8M x 36  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |            Size            |            Bank 0             |
          |----------------------------+-------------------------------|
          |           256KB            |          (8) 32K x 8          |
          |----------------------------+-------------------------------|
          |           512KB            |          (8) 64K x 8          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |       Size       |         J4         |         J5         |
          |------------------+--------------------+--------------------|
          |      256KB       | pins 1 & 2 closed  | pins 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |      512KB       | pins 2 & 3 closed  | pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Speed   |        J6         |        J7         |   J8   |
          |-----------+-------------------+-------------------+--------|
          |   90MHz   |       Open        | pins 1 & 2 closed |  Open  |
          |-----------+-------------------+-------------------+--------|
          |  100MHz   | pins 1 & 2 closed | pins 1 & 2 closed |  Open  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             IRQ LEGACY CONNECTOR CONFIGURATION             |
          |------------------------------------------------------------|
          |          Description          |            J31             |
          |-------------------------------+----------------------------|
          |         No connection         |           pin 1            |
          |-------------------------------+----------------------------|
          |         No connection         |           pin 2            |
          |-------------------------------+----------------------------|
          |          Interrupt 5          |           pin 3            |
          |-------------------------------+----------------------------|
          |         Interrupt 14          |           pin 4            |
          |-------------------------------+----------------------------|
          |         Interrupt 15          |           pin 5            |
          |-------------------------------+----------------------------|
          |          Interrupt 6          |           pin 6            |
          |-------------------------------+----------------------------|
          |          Interrupt 7          |           pin 7            |
          |-------------------------------+----------------------------|
          |         No connection         |           pin 8            |
          |-------------------------------+----------------------------|
          |          Interrupt 9          |           pin 9            |
          |-------------------------------+----------------------------|
          |         Interrupt 10          |           pin 10           |
          |-------------------------------+----------------------------|
          |         Interrupt 11          |           pin 11           |
          |-------------------------------+----------------------------|
          |         Interrupt 12          |           pin 12           |
          |-------------------------------+----------------------------|
          |          Interrupt 3          |           pin 13           |
          |-------------------------------+----------------------------|
          |          Interrupt 4          |           pin 14           |
          +------------------------------------------------------------+