(TXT) View Source
       
       # DELL COMPUTER CORPORATION
       
          SYSTEM 4XX/P NETPLEX
       
          Processor       80486SX/80486DX/80486DX2                       
          Processor Speed 25/33/50(internal)/50/66(internal)MHz          
          Chip Set        SIS                                            
          Max. Onboard    32MB                                           
          DRAM            
          Cache           128KB                                          
          BIOS            Phoenix                                        
          Dimensions      330mm x 218mm                                  
          I/O Options     Bus mouse port, floppy drive interface, IDE    
                          interface, parallel port, riser card slot,     
                          serial ports (2), VGA feature connector, VGA   
                          port                                           
          NPU Options     None                                           
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose        | Location | Purpose             | Location |
          |----------------+----------+---------------------+----------|
          | Bus mouse port |   CN1    | VGA feature         |   CN6    |
          |                |          | connector           |          |
          |----------------+----------+---------------------+----------|
          | Serial port 1  |   CN2    | IDE interface LED   |   CN7    |
          |----------------+----------+---------------------+----------|
          | Serial port 2  |   CN3    | Floppy drive        |   CN8    |
          |                |          | interface           |          |
          |----------------+----------+---------------------+----------|
          | Parallel port  |   CN4    | IDE interface LED   |   JP5    |
          |----------------+----------+---------------------+----------|
          | VGA port       |   CN5    | Riser card slot     |    S1    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper  | Position  |
          |--------------------------------------+---------+-----------|
          | » | VGA IRQ9 disabled                |   JP1   |   Open    |
          |---+----------------------------------+---------+-----------|
          |   | VGA IRQ9 enabled                 |   JP1   |  Closed   |
          |---+----------------------------------+---------+-----------|
          | » | Monitor type select color        |   JP2   |  Closed   |
          |---+----------------------------------+---------+-----------|
          |   | Monitor type select monochrome   |   JP2   |   Open    |
          |---+----------------------------------+---------+-----------|
          | » | Password enabled                 |   JP7   |  Closed   |
          |---+----------------------------------+---------+-----------|
          |   | Password disabled                |   JP7   |   Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                PARALLEL PORT CONFIGURATION                 |
          |------------------------------------------------------------|
          |            Port            |              JP6              |
          |----------------------------+-------------------------------|
          |         LPT 1/IRQ7         |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |         LPT 1/IRQ5         |       pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |         LPT 3/IRQ7         |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          Disabled          |             Open              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 1       |       Bank 2       |
          |------------------+--------------------+--------------------|
          |       4MB        |    (1) 1M x 36     |        NONE        |
          |------------------+--------------------+--------------------|
          |       5MB        |    (1) 1M x 36     |   (1) 256K x 36    |
          |------------------+--------------------+--------------------|
          |       8MB        |    (1) 1M x 36     |    (1) 1M x 36     |
          |------------------+--------------------+--------------------|
          |       16MB       |    (1) 4M x 36     |        NONE        |
          |------------------+--------------------+--------------------|
          |       17MB       |    (1) 4M x 36     |   (1) 256K x 36    |
          |------------------+--------------------+--------------------|
          |       20MB       |    (1) 4M x 36     |    (1) 1M x 36     |
          |------------------+--------------------+--------------------|
          |       32MB       |    (1) 4M x 36     |    (1) 4M x 36     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  VIDEO RAM CONFIGURATION                   |
          |------------------------------------------------------------|
          |     Size      |        Bank 0        |       Bank 1        |
          |---------------+----------------------+---------------------|
          |     512KB     |    (4) 256KB x 4     |        NONE         |
          |---------------+----------------------+---------------------|
          |      1MB      |    (4) 256KB x 4     |    (4) 256KB x 4    |
          |------------------------------------------------------------|
          | Note:Bank 0 is factory installed and is not configurable.  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |           CPU speed           |            JP3             |
          |-------------------------------+----------------------------|
          |             25MHz             |           Closed           |
          |-------------------------------+----------------------------|
          |             33MHz             |            Open            |
          |-------------------------------+----------------------------|
          |            50iMHz             |           Closed           |
          |-------------------------------+----------------------------|
          |            66iMHz             |            Open            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CPU TYPE SELECT                       |
          |------------------------------------------------------------|
          |   CPU type    |    JP4 A-C    |    JP4D-F    |   JP4G-I    |
          |---------------+---------------+--------------+-------------|
          |    80486SX    |    Closed     |     Open     |    Open     |
          |---------------+---------------+--------------+-------------|
          |    80487SX    |     Open      |     Open     |   Closed    |
          |---------------+---------------+--------------+-------------|
          |    80486DX    |     Open      |    Closed    |    Open     |
          |---------------+---------------+--------------+-------------|
          |   80486DX2    |     Open      |    Closed    |    Open     |
          +------------------------------------------------------------+