INDUSTRIAL COMPUTER SOURCE
==========================

   SB21064

   Processor        Alpha                                         
   Processor Speed  275/300MHz                                    
   Chip Set         DEC                                           
   Video Chip Set   None                                          
   Maximum Onboard  128MB                                         
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            512/2048KB                                    
   BIOS             Unidentified                                  
   Dimensions       Unidentified                                  
   I/O Options      Floppy drive interface, IDE interface, SCSI-2 
                    interface, parallel port, PS/2 mouse          
                    interface, serial ports (2), cache slots (2)  
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/I-L/34546-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | SCSI-2 interface    |    J1    | Chassis fan    |   J14    |
   |                     |          | power          |          |
   |---------------------+----------+----------------+----------|
   | Speaker, keyboard,  |    J3    | IDE interface  |   J15    |
   | keylock ,reset      |          | LED            |          |
   |---------------------+----------+----------------+----------|
   | IDE interface       |    J4    | PS/2 mouse     |   J19    |
   |                     |          | interface      |          |
   |---------------------+----------+----------------+----------|
   | Floppy drive        |    J5    | Serial port 1  |    P1    |
   | interface           |          |                |          |
   |---------------------+----------+----------------+----------|
   | Serial port 2       |    J6    | Cache slots    |  SL1 &   |
   |                     |          |                |   SL2    |
   |---------------------+----------+----------------+----------|
   | Parallel port       |   J11    |                |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             |  Label   |   Position   |
   |----------------------------------+----------+--------------|
   |   | SCSI termination enabled     |   J10    |     Open     |
   |---+------------------------------+----------+--------------|
   |   | SCSI termination disabled    |   J10    |    Closed    |
   |---+------------------------------+----------+--------------|
   |>> | Flash BIOS memory update     |   J16    |  Pins 2 & 3  |
   |   | enabled                      |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | Flash BIOS memory update     |   J16    |  Pins 1 & 2  |
   |   | disabled                     |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | SROM debugger                | J17/pins |     Open     |
   |   |                              | 23 & 24  |              |
   |---+------------------------------+----------+--------------|
   |   | Flash BIOS first image       | J17/pins |     Open     |
   |   | booted                       | 25 & 26  |              |
   |---+------------------------------+----------+--------------|
   |   | Flash BIOS firmware image    | J17/pins |    Closed    |
   |   | booted                       | 25 & 26  |              |
   |---+------------------------------+----------+--------------|
   |   | SROM test port               |   J18    | Unidentified |
   |---+------------------------------+----------+--------------|
   |   | SCSI controller enabled      |   J20    |  Pins 1 & 2  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | SCSI controller disabled     |   J20    |  Pins 2 & 3  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |>> | Factory configured - do not  |   JP1    | Unidentified |
   |   | alter                        |          |              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SIMM CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            8MB             |          (2) 1M x 36          |
   |----------------------------+-------------------------------|
   |            16MB            |          (2) 2M x 36          |
   |----------------------------+-------------------------------|
   |            32MB            |          (2) 4M x 36          |
   |----------------------------+-------------------------------|
   |            64MB            |          (2) 8M x 36          |
   |----------------------------+-------------------------------|
   |           128MB            |         (2) 16M x 36          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Note: The sizes of the cache modules and orientation are   |
   | unidentified.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  | J13/pins 1  | J13/pins 3 | J13/pins 5 | J13/pins 7 |
   |       |     & 2     |    & 4     |    & 6     |    & 8     |
   |-------+-------------+------------+------------+------------|
   | None  |    Open     |    Open    |    Open    |    Open    |
   |-------+-------------+------------+------------+------------|
   | 512KB |    Open     |    Open    |    Open    |    Open    |
   |-------+-------------+------------+------------+------------|
   |  2MB  |   Closed    |   Closed   |    Open    |    Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE JUMPER CONFIGURATION (CON'T)             |
   |------------------------------------------------------------|
   | Size  |  J17/pins 11 &  | J17/pins 13 /&  | J17/pins 15 &  |
   |       |       12        |       14        |       16       |
   |-------+-----------------+-----------------+----------------|
   | None  |     Closed      |     Closed      |     Closed     |
   |-------+-----------------+-----------------+----------------|
   | 512KB |      Open       |     Closed      |     Closed     |
   |-------+-----------------+-----------------+----------------|
   |  2MB  |      Open       |      Open       |     Closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE JUMPER CONFIGURATION (CON'T)             |
   |------------------------------------------------------------|
   | Size  |  J17/pins 17 &  |  J17/pins 19 &  | J17/pins 21 &  |
   |       |       18        |       20        |       22       |
   |-------+-----------------+-----------------+----------------|
   | 512KB |     Closed      |      Open       |      Open      |
   |-------+-----------------+-----------------+----------------|
   |  2MB  |     Closed      |      Open       |      Open      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   | Speed  | J17/pins 1 | J17/pins 3 | J17/pins 5 | J17/pins 7 |
   |        |    & 2     |    & 4     |    & 6     |    & 8     |
   |--------+------------+------------+------------+------------|
   | 275MHz |   Closed   |    Open    |    Open    |    Open    |
   |--------+------------+------------+------------+------------|
   | 300MHz |   Closed   |    Open    |    Open    |    Open    |
   +------------------------------------------------------------+