TYAN COMPUTER CORPORATION
=========================

   S1662S (REV. 1.2)

   Processor        Pentium Pro                                   
   Processor Speed  150/166/180/200MHz                            
   Chip Set         Intel                                         
   Video Chip Set   None                                          
   Maximum Onboard  1GB (EDO supported)                           
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            256/512KB (located on Pentium Pro CPU)        
   BIOS             AMI/Award                                     
   Dimensions       330mm x 218mm                                 
   I/O Options      32-bit PCI slots (5), floppy drive interface, 
                    IDE interfaces (2), parallel port, PS/2 mouse 
                    interface, serial ports (2), IR connectors    
                    (2), VRM connector, USB connectors (2)        
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/S-T/33846-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |   CN1    | Turbo switch     |   J30    |
   |-------------------+----------+------------------+----------|
   | Serial port 1     |   CN2    | Power LED &      |   J31    |
   |                   |          | keylock          |          |
   |-------------------+----------+------------------+----------|
   | Floppy drive      |   CN3    | Speaker          |   J33    |
   | interface         |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Parallel port     |   CN4    | IDE interface    |   J43    |
   |                   |          | LED              |          |
   |-------------------+----------+------------------+----------|
   | IDE interface 2   |   CN5    | Reset switch     |   J46    |
   |-------------------+----------+------------------+----------|
   | IDE interface 1   |   CN6    | 32-bit PCI slots |  PC1 -   |
   |                   |          |                  |   PC5    |
   |-------------------+----------+------------------+----------|
   | PS/2 mouse        |   CN7    | USB connector    |   UBS1   |
   | interface         |          |                  |          |
   |-------------------+----------+------------------+----------|
   | IR connector      |   CON6   | USB connector    |   USB2   |
   |-------------------+----------+------------------+----------|
   | IR connector      |   CON7   | VRM connector    |   VRM0   |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |   J29    |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Label |   Position   |
   |-------------------------------------+-------+--------------|
   |>> | CMOS memory normal operation    |  J5   |     Open     |
   |---+---------------------------------+-------+--------------|
   |   | CMOS memory clear               |  J5   |    Closed    |
   |---+---------------------------------+-------+--------------|
   |>> | Flash BIOS voltage select 5v    |  J9   |  Pins 1 & 2  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | Flash BIOS voltage select 12v   |  J9   |  Pins 2 & 3  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | Factory configured - do not     |  J17  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |   | SMC I/O chip type select 665IR  |  J34  |  Pins 1 & 2  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | SMC I/O chip type select 669IR  |  J34  |  Pins 2 & 3  |
   |   |                                 |       |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |-------+-------------+------------+------------+------------|
   |  8MB  | (2) 1M x 36 |    None    |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   | 16MB  | (2) 2M x 36 |    None    |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   | 16MB  | (2) 1M x 36 |  (2) 1M x  |    None    |    None    |
   |       |             |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (2) 2M x 36 |  (2) 2M x  |    None    |    None    |
   |       |             |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (2) 1M x 36 |  (2) 1M x  |  (2) 1M x  |  (2) 1M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (2) 4M x 36 |    None    |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (2) 4M x 36 |  (2) 4M x  |    None    |    None    |
   |       |             |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (2) 8M x 36 |    None    |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   | 128MB |  (2) 16M x  |    None    |    None    |    None    |
   |       |     36      |            |            |            |
   |-------+-------------+------------+------------+------------|
   | 128MB | (2) 4M x 36 |  (2) 4M x  |  (2) 4M x  |  (2) 4M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 128MB | (2) 8M x 36 |  (2) 8M x  |    None    |    None    |
   |       |             |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 192MB | (2) 8M x 36 |  (2) 8M x  |  (2) 8M x  |    None    |
   |       |             |     36     |     36     |            |
   |-------+-------------+------------+------------+------------|
   | 256MB | (2) 8M x 36 |  (2) 8M x  |  (2) 8M x  |  (2) 8M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 256MB |  (2) 16M x  | (2) 16M x  |    None    |    None    |
   |       |     36      |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 256MB |  (2) 32M x  |    None    |    None    |    None    |
   |       |     36      |            |            |            |
   |-------+-------------+------------+------------+------------|
   | 384MB |  (2) 16M x  | (2) 16M x  | (2) 16M x  |    None    |
   |       |     36      |     36     |     36     |            |
   |-------+-------------+------------+------------+------------|
   | 512MB |  (2) 16M x  | (2) 16M x  | (2) 16M x  | (2) 16M x  |
   |       |     36      |     36     |     36     |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM CONFIGURATION (CON'T)                 |
   |------------------------------------------------------------|
   |  Size   |    Bank 0    |  Bank 1   |  Bank 2   |  Bank 3   |
   |---------+--------------+-----------+-----------+-----------|
   |  512MB  | (2) 32M x 36 | (2) 32M x |   None    |   None    |
   |         |              |    36     |           |           |
   |---------+--------------+-----------+-----------+-----------|
   |  640MB  | (2) 32M x 36 | (2) 16M x | (2) 16M x | (2) 16M x |
   |         |              |    36     |    36     |    36     |
   |---------+--------------+-----------+-----------+-----------|
   |  768MB  | (2) 32M x 36 | (2) 32M x | (2) 32M x |   None    |
   |         |              |    36     |    36     |           |
   |---------+--------------+-----------+-----------+-----------|
   |  768MB  | (2) 32M x 36 | (2) 32M x | (2) 16M x | (2) 16M x |
   |         |              |    36     |    36     |    36     |
   |---------+--------------+-----------+-----------+-----------|
   |  832MB  | (2) 32M x 36 | (2) 32M x | (2) 32M x | (2) 8M x  |
   |         |              |    36     |    36     |    36     |
   |---------+--------------+-----------+-----------+-----------|
   |  896MB  | (2) 32M x 36 | (2) 32M x | (2) 32M x | (2) 16M x |
   |         |              |    36     |    36     |    36     |
   |---------+--------------+-----------+-----------+-----------|
   | 1024MB  | (2) 32M x 36 | (2) 32M x | (2) 32M x | (2) 32M x |
   |         |              |    36     |    36     |    36     |
   |------------------------------------------------------------|
   | Note: Board accepts EDO memory. Board also accepts x 32    |
   | SIMMs.                                                     |
   +------------------------------------------------------------+

   +---------------------------------------------------------------+
   |                  DRAM VOLTAGE CONFIGURATION                   |
   |---------------------------------------------------------------|
   |Voltage| J20  | J21  | J22  | J23  | J44  | J45  | J47  | J48  |
   |-------+------+------+------+------+------+------+------+------|
   | 3.3v  |Closed|Closed|Closed|Closed| Open | Open | Open | Open |
   |-------+------+------+------+------+------+------+------+------|
   |  5v   | Open | Open | Open | Open |Closed|Closed|Closed|Closed|
   +---------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Note: 256KB/512KB cache is located on the Pentium Pro CPU. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   | Speed  |  J14  |  J15  |  J24  |  J25  | J27  | J28  | J32 |
   |--------+-------+-------+-------+-------+------+------+-----|
   | 150MHz | Open  |Closed |Closed |Closed | Open |Closed|3 & 4|
   |--------+-------+-------+-------+-------+------+------+-----|
   | 166MHz |Closed | Open  |Closed |Closed | Open |Closed|1 & 2|
   |--------+-------+-------+-------+-------+------+------+-----|
   | 180MHz | Open  |Closed | Open  |Closed |Closed|Closed|3 & 4|
   |--------+-------+-------+-------+-------+------+------+-----|
   | 200MHz |Closed | Open  | Open  |Closed |Closed|Closed|1 & 2|
   |------------------------------------------------------------|
   |Note: Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU VOLTAGE SELECTION                    |
   |------------------------------------------------------------|
   |          Voltage           |              J10              |
   |----------------------------+-------------------------------|
   |>>     |    Auto select     |             Open              |
   |-------+--------------------+-------------------------------|
   |       |        2.1v        |             1 & 5             |
   |-------+--------------------+-------------------------------|
   |       |        2.2v        |             2 & 6             |
   |-------+--------------------+-------------------------------|
   |       |        2.3v        |         1 & 5, 2 & 6          |
   |-------+--------------------+-------------------------------|
   |       |        2.4v        |             3 & 7             |
   |-------+--------------------+-------------------------------|
   |       |        2.5v        |         1 & 5, 3 & 7          |
   |-------+--------------------+-------------------------------|
   |       |        2.6v        |         2 & 6, 3 & 7          |
   |-------+--------------------+-------------------------------|
   |       |        2.7v        |      1 & 5, 2 & 6, 3 & 7      |
   |-------+--------------------+-------------------------------|
   |       |        2.8v        |             4 & 8             |
   |-------+--------------------+-------------------------------|
   |       |        2.9v        |         1 & 5, 4 & 8          |
   |-------+--------------------+-------------------------------|
   |       |        3.0v        |         2 & 6, 4 & 8          |
   |-------+--------------------+-------------------------------|
   |       |        3.1v        |      1 & 5, 2 & 6, 4 & 8      |
   |-------+--------------------+-------------------------------|
   |       |        3.2v        |         3 & 7, 4 & 8          |
   |-------+--------------------+-------------------------------|
   |       |        3.3v        |      1 & 5, 3 & 7, 4 & 8      |
   |-------+--------------------+-------------------------------|
   |       |        3.4v        |      2 & 6, 3 & 7, 4 & 8      |
   |-------+--------------------+-------------------------------|
   |       |        3.5v        |  1 & 5, 2 & 6, 3 & 7, 4 & 8   |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   SERIAL PORT SELECTION                    |
   |------------------------------------------------------------|
   |        Setting         |       J18       |       J19       |
   |------------------------+-----------------+-----------------|
   |>> | Used and COM 1 or  |   Pins 1 & 2    |   Pins 1 & 2    |
   |   |         2          |     closed      |     closed      |
   |---+--------------------+-----------------+-----------------|
   |   |     Used as IR     |   Pins 2 & 3    |   Pins 2 & 3    |
   |   |     connector      |     closed      |     closed      |
   +------------------------------------------------------------+