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

   DECPC LPV, DECPC LPV+

   Processor        80486SX/80486DX/80486DX2                      
   Processor Speed  25/33/40/50(internal)/50/66(internal)MHz      
   Chip Set         Unidentified                                  
   Video Chip Set   None                                          
   Maximum Onboard  64MB                                          
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            128/256KB                                     
   BIOS             Unidentified                                  
   Dimensions       254mm x 218mm                                 
   I/O Options      Floppy drive interface, IDE interface,        
                    parallel port, PS/2 mouse port, serial ports  
                    (2), VGA port, riser slot                     
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/C-D/34055-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location | Purpose            | Location |
   |-----------------+----------+--------------------+----------|
   | VGA port        |   CN1    | IDE interface      |   CN6    |
   |-----------------+----------+--------------------+----------|
   | Parallel port   |   CN2    | Floppy drive       |   CN7    |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port     |   CN3    | Front panel        |   CN8    |
   |                 |          | connector          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port     |   CN4    | Cache slot         |   SL1    |
   |-----------------+----------+--------------------+----------|
   | PS/2 mouse port |   CN5    |                    |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Reset switch enabled              |  J9   |   Closed   |
   |---+-----------------------------------+-------+------------|
   |   | Reset switch disabled             |  J9   |    Open    |
   |---+-----------------------------------+-------+------------|
   |>> | RDY signal select VLRDY >CPURDY   |  J10  | Pins 1 & 2 |
   |   | (connects through CPU bus)        |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | RDY signal select VLRDY >CPURDY   |  J10  | Pins 2 & 3 |
   |   | (synchronized through chipset)    |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | On board video enabled            |  J23  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | On board video disabled           |  J23  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | VGA IRQ9 disabled                 |  J25  |    Open    |
   |---+-----------------------------------+-------+------------|
   |   | VGA IRQ9 enabled                  |  J25  |   Closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Flash BIOS normal operation       |  J27  |    Open    |
   |---+-----------------------------------+-------+------------|
   |   | Flash BIOS recovery mode          |  J27  |   Closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J28  |    Open    |
   |---+-----------------------------------+-------+------------|
   |>> | Monitor type select monochrome    |  J29  |    Open    |
   |---+-----------------------------------+-------+------------|
   |   | Monitor type select color         |  J29  |   Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (1) 1M x 36 |    None     |    None    |    None    |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (1) 1M x 36 | (1) 1M x 36 |    None    |    None    |
   |------+-------------+-------------+------------+------------|
   | 12MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |    None    |
   |      |             |             |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 16MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 16MB | (1) 4M x 36 |    None     |    None    |    None    |
   |------+-------------+-------------+------------+------------|
   | 20MB | (1) 1M x 36 | (1) 4M x 36 |    None    |    None    |
   |------+-------------+-------------+------------+------------|
   | 24MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 4M x  |    None    |
   |      |             |             |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 32MB | (1) 4M x 36 | (1) 4M x 36 |    None    |    None    |
   |------+-------------+-------------+------------+------------|
   | 40MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 4M x  |  (1) 4M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 48MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |    None    |
   |      |             |             |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 64MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |  (1) 4M x  |
   |      |             |             |     36     |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     None      | Unidentified  |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  | Unidentified  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |     J3      |     J4     |     J6     |     J7     |
   |-------+-------------+------------+------------+------------|
   | None  |    Open     |    Open    |    Open    |    Open    |
   |-------+-------------+------------+------------+------------|
   | 128KB | Pins 1 & 2  | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
   |       |   closed    |   closed   |   closed   |   closed   |
   |-------+-------------+------------+------------+------------|
   | 256KB | Pins 2 & 3  | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
   |       |   closed    |   closed   |   closed   |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |     Speed     |     J18      |     J19      |     J20      |
   |---------------+--------------+--------------+--------------|
   |     25MHz     |     Open     |    Closed    |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     33MHz     |    Closed    |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     40MHz     |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |    50iMHz     |     Open     |    Closed    |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     50MHz     |     Open     |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |    66iMHz     |    Closed    |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |       Type       |        J11         |        J12         |
   |------------------+--------------------+--------------------|
   |     80486SX      | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |     80486DX      | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |     80486DX2     | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+