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       # ALPHA MICROSYSTEMS
       
          ROADRUNNER AM-172
       
          Processor              Motorola 68030                          
          Processor Speed        40MHz                                   
          Chip Set               Unidentified                            
          Video Chip Set         None                                    
          Maximum Onboard Memory 32MB                                    
          Maximum Video Memory   None                                    
          Cache                  256KB                                   
          BIOS                   Unidentified                            
          Dimensions             Unidentified                            
          I/O Options            SCSI interface, X-bus connectors (2)    
          NPU Options            None                                    
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | Power connector   |   CN1    | X-bus connector  |    J2    |
          |-------------------+----------+------------------+----------|
          | SCSI interface    |    J1    | X-bus connector  |    J3    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function                | Label  | Position  |
          |---------------------------------------+--------+-----------|
          | » | Factory configured - do not alter |   C1   |   Open    |
          |---+-----------------------------------+--------+-----------|
          | » | Factory configured - do not alter |   C3   |  Closed   |
          |---+-----------------------------------+--------+-----------|
          | » | Factory configured - do not alter |   C4   |   Open    |
          |---+-----------------------------------+--------+-----------|
          | » | Factory configured - do not alter |   C5   |  Closed   |
          |---+-----------------------------------+--------+-----------|
          | » | X-bus active termination enabled  |  JP4   |  Closed   |
          |---+-----------------------------------+--------+-----------|
          |   | X-bus active termination disabled |  JP4   |   Open    |
          |---+-----------------------------------+--------+-----------|
          | » | Factory configured - do not alter |  JP16  |  Closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |            Size            |            Bank 0             |
          |----------------------------+-------------------------------|
          |            4MB             |          (1) 1M x 36          |
          |----------------------------+-------------------------------|
          |            8MB             |          (1) 2M x 36          |
          |----------------------------+-------------------------------|
          |            16MB            |          (1) 4M x 36          |
          |----------------------------+-------------------------------|
          |            32MB            |          (1) 8M x 36          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |       Size       |        JP5         |        JP6         |
          |------------------+--------------------+--------------------|
          |       4MB        |       Closed       |       Closed       |
          |------------------+--------------------+--------------------|
          |       8MB        |       Closed       |        Open        |
          |------------------+--------------------+--------------------|
          |       16MB       |        Open        |       Closed       |
          |------------------+--------------------+--------------------|
          |       32MB       |        Open        |        Open        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          | Note: The location of the 256KB cache is unidentified.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |            Setting            |             C2             |
          |-------------------------------+----------------------------|
          |            Enabled            |            Open            |
          |-------------------------------+----------------------------|
          |           Disabled            |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                TERMINATION POWER SELECTION                 |
          |------------------------------------------------------------|
          |            Setting            |            JP1             |
          |-------------------------------+----------------------------|
          | » |      TERMPWR enabled      |     Pins 2 & 3 closed      |
          |---+---------------------------+----------------------------|
          |   |     TERMPWR disabled      |     Pins 1 & 2 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SCSI BUS SELECTION                     |
          |------------------------------------------------------------|
          |                Setting                 |        JP2        |
          |----------------------------------------+-------------------|
          | » |    SCSI bus active termination     | Pins 1 & 2 closed |
          |   |              enabled               |                   |
          |---+------------------------------------+-------------------|
          |   |    SCSI bus active termination     | Pins 2 & 3 closed |
          |   |              disabled              |                   |
          +------------------------------------------------------------+