(TXT) View Source
       
       # DIGITAL EQUIPMENT CORPORATION
       
          DECPC LPX+
       
          Processor  SL80486SX/SL80486DX/SL80486DX2/SL80486DX4/P24T         
          Processor  25/33/40/50(internal)/50/66(internal)/100(internal)MHz 
          Speed      
          Chip Set   Unidentified                                           
          Video Chip None                                                   
          Set        
          Maximum    64MB                                                   
          Onboard    
          Memory     
          Maximum    None                                                   
          Video      
          Memory     
          Cache      128/256KB                                              
          BIOS       Unidentified                                           
          Dimensions 254mm x 218mm                                          
          I/O        32-bit VESA local bus slots (2), floppy drive          
          Options    interface, IDE interface, parallel port, PS/2 mouse    
                     port, serial ports (2)                                 
          NPU        None                                                   
          Options    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose         | Location | Purpose            | Location |
          |-----------------+----------+--------------------+----------|
          | Parallel port   |   CN1    | IDE interface      |   CN5    |
          |-----------------+----------+--------------------+----------|
          | Serial port     |   CN2    | Floppy drive       |   CN6    |
          |                 |          | interface          |          |
          |-----------------+----------+--------------------+----------|
          | Serial port     |   CN3    | 32-bit VESA local  |  SL1 &   |
          |                 |          | bus slots          |   SL2    |
          |-----------------+----------+--------------------+----------|
          | PS/2 mouse port |   CN4    |                    |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function                | Label |  Position  |
          |---------------------------------------+-------+------------|
          | » | Monitor type select monochrome    |  J14  |    Open    |
          |---+-----------------------------------+-------+------------|
          |   | Monitor type select color         |  J14  |   Closed   |
          |---+-----------------------------------+-------+------------|
          | » | Password normal operation         |  J15  |    Open    |
          |---+-----------------------------------+-------+------------|
          |   | Password clear                    |  J15  |   Closed   |
          |---+-----------------------------------+-------+------------|
          | » | Reset switch enabled              |  J24  |   Closed   |
          |---+-----------------------------------+-------+------------|
          |   | Reset switch disabled             |  J24  |    Open    |
          |---+-----------------------------------+-------+------------|
          | » | Factory configured – do not alter |  J36  |   Closed   |
          |---+-----------------------------------+-------+------------|
          | » | VLRDY >CPURDY connects to CPU bus |  J44  | Pins 1 & 2 |
          |   | ready                             |       |   closed   |
          |---+-----------------------------------+-------+------------|
          |   | VLRDY >LRDY synchronized through  |  J44  | Pins 2 & 3 |
          |   | chipset                           |       |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       4MB        |   (2) 256K x 36    |   (2) 256K x 36    |
          |------------------+--------------------+--------------------|
          |       4MB        |   (2) 512K x 36    |        None        |
          |------------------+--------------------+--------------------|
          |       8MB        |    (2) 1M x 36     |        None        |
          |------------------+--------------------+--------------------|
          |       16MB       |    (2) 2M x 36     |        None        |
          |------------------+--------------------+--------------------|
          |       16MB       |    (2) 1M x 36     |    (2) 1M x 36     |
          |------------------+--------------------+--------------------|
          |       24MB       |    (2) 2M x 36     |    (2) 1M x 36     |
          |------------------+--------------------+--------------------|
          |       32MB       |    (2) 4M x 36     |        None        |
          |------------------+--------------------+--------------------|
          |       32MB       |    (2) 2M x 36     |    (2) 2M x 36     |
          |------------------+--------------------+--------------------|
          |       40MB       |    (2) 4M x 36     |    (2) 1M x 36     |
          |------------------+--------------------+--------------------|
          |       48MB       |    (2) 4M x 36     |    (2) 2M x 36     |
          |------------------+--------------------+--------------------|
          |       64MB       |    (2) 4M x 36     |    (2) 4M x 36     |
          |------------------------------------------------------------|
          | Note: The location of banks 0 & 1 are unidentified.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |      TAG      |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |     None      |  (2) 32K x 8  |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (2) 32K x 8  |
          |------------------------------------------------------------|
          | Note: The location of banks 0 & 1 are unidentified.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size  |     J4      |     J5     |     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     |      J1      |      J2      |      J3      |
          |---------------+--------------+--------------+--------------|
          |     25MHz     |     Open     |    Closed    |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     33MHz     |    Closed    |     Open     |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     40MHz     |    Closed    |     Open     |     Open     |
          |---------------+--------------+--------------+--------------|
          |    50iMHz     |     Open     |    Closed    |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     50MHz     |     Open     |     Open     |     Open     |
          |---------------+--------------+--------------+--------------|
          |    66iMHz     |    Closed    |     Open     |    Closed    |
          |---------------+--------------+--------------+--------------|
          |    100iMHz    |    Closed    |     Open     |    Closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     CPU TYPE SELECTION                     |
          |------------------------------------------------------------|
          |            Type            |              J35              |
          |----------------------------+-------------------------------|
          |         SL80486SX          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |         SL80486DX          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |         SL80486DX2         |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |         SL80486DX4         |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |            P24T            |       Pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                VL BUS WAIT STATE SELECTION                 |
          |------------------------------------------------------------|
          |          Setting           |              J28              |
          |----------------------------+-------------------------------|
          | »  |           0           |       Pins 1 & 2 closed       |
          |----+-----------------------+-------------------------------|
          |    |           1           |       Pins 2 & 3 closed       |
          +------------------------------------------------------------+