DIGITAL EQUIPMENT CORPORATION
=============================

   ALPHASERVER 300

   Device Type      Mainboard                                     
   Processor        Alpha                                         
   Processor Speed  266MHz                                        
   Chip Set         Unidentified                                  
   Maximum Onboard  512MB                                         
   Memory           
   Cache            2MB                                           
   BIOS             Unidentified                                  
   Dimensions       254mm x 218mm                                 
   I/O Options      Floppy drive interface, SCSI interfaces (2),  
                    parallel port, PS/2 mouse port, serial ports  
                    (2), riser slot                               

<gopher://bitreich.org/I/th99/m/C-D/35970-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Service LED    |   CN1    | Serial port         |   CN6    |
   |----------------+----------+---------------------+----------|
   | Service LED    |   CN2    | PS/2 mouse port     |   CN7    |
   |----------------+----------+---------------------+----------|
   | SCSI interface |   CN3    | SCSI interface      |   CN8    |
   |----------------+----------+---------------------+----------|
   | Parallel port  |   CN4    | Floppy drive        |   CN9    |
   |                |          | interface           |          |
   |----------------+----------+---------------------+----------|
   | Serial port    |   CN5    | Riser slot          |   SL1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Console select main console       |  J1   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Console select mini console       |  J1   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Boot up from flash BIOS           |  J2   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Boot up from floppy               |  J2   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Reset switch select reset         |  J3   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Reset switch select halt          |  J3   | Pins 2 & 3 |
   |   | interrupt request                 |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Flash BIOS write protect disabled |  J4   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Flash BIOS write protect enabled  |  J4   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J21  |    Open    |
   |---+-----------------------------------+-------+------------|
   |>> | External SCSI cable sensing       |  J27  |    Open    |
   |   | enabled                           |       |            |
   |---+-----------------------------------+-------+------------|
   |   | External SCSI cable sensing       |  J27  |   Closed   |
   |   | disabled                          |       |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SIMM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       16MB       |    (4) 1M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       32MB       |    (4) 1M x 36     |    (4) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (4) 2M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       48MB       |    (4) 2M x 36     |    (4) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 2M x 36     |    (4) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 4M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       80MB       |    (4) 4M x 36     |    (4) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       96MB       |    (4) 4M x 36     |    (4) 2M x 36     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (4) 4M x 36     |    (4) 4M x 36     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (4) 8M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |      160MB       |    (4) 8M x 36     |    (4) 2M x 36     |
   |------------------+--------------------+--------------------|
   |      192MB       |    (4) 8M x 36     |    (4) 4M x 36     |
   |------------------+--------------------+--------------------|
   |      256MB       |    (4) 8M x 36     |    (4) 8M x 36     |
   |------------------+--------------------+--------------------|
   |      256MB       |    (4) 16M x 36    |        None        |
   |------------------+--------------------+--------------------|
   |      272MB       |    (4) 16M x 36    |    (4) 1M x 36     |
   |------------------+--------------------+--------------------|
   |      288MB       |    (4) 16M x 36    |    (4) 2M x 36     |
   |------------------+--------------------+--------------------|
   |      320MB       |    (4) 16M x 36    |    (4) 4M x 36     |
   |------------------+--------------------+--------------------|
   |      384MB       |    (4) 16M x 36    |    (4) 8M x 36     |
   |------------------+--------------------+--------------------|
   |      512MB       |    (4) 16M x 36    |    (4) 16M x 36    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Note: The location of the cache is unidentified.           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |      Speed       |         J7         |        J32         |
   |------------------+--------------------+--------------------|
   |      266Hz       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     I/O CHIP SELECTION                     |
   |------------------------------------------------------------|
   |         Type         |       J25        |       J26        |
   |----------------------+------------------+------------------|
   |>> |      87332       |      Closed      |      Closed      |
   |---+------------------+------------------+------------------|
   |   |      87312       |       Open       |       Open       |
   +------------------------------------------------------------+