(TXT) View Source
       
       # DELL COMPUTER CORPORATION
       
          SYSTEMS 4XX/L(V), 4XX/MX(V) OPTIPLEX
       
          Processor    80486SX/80486DX/80486DX2                          
          Processor    25/33/50(internal)/66(internal)MHz                
          Speed        
          Chip Set     Headland                                          
          Max. Onboard 64MB                                              
          DRAM         
          Cache        128KB (on external cache card)                    
          BIOS         Unidentified                                      
          Dimensions   330mm x 218mm                                     
          I/O Options  32-bit external cache card, 32-bit VESA local bus 
                       slot, floppy drive interface, IDE interface,      
                       parallel port, PS/2 mouse port, serial ports (2), 
                       VGA feature connector, VGA port                   
          NPU Options  None                                              
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | PS/2 mouse port  |   CN1    | Floppy drive      |   CN8    |
          |                  |          | interface         |          |
          |------------------+----------+-------------------+----------|
          | Serial port 1    |   CN2    | IDE interface     |   CN9    |
          |------------------+----------+-------------------+----------|
          | Serial port 2    |   CN3    | External battery  |    J3    |
          |------------------+----------+-------------------+----------|
          | Parallel port    |   CN4    | Control panel     |    J4    |
          |                  |          | connector         |          |
          |------------------+----------+-------------------+----------|
          | VGA port         |   CN5    | IDE interface LED |    J5    |
          |------------------+----------+-------------------+----------|
          | Video memory     |   CN6    | Riser Card        |   SL1    |
          | upgrade module   |          |                   |          |
          |------------------+----------+-------------------+----------|
          | VGA feature      |   CN7    | 32-bit VESA Local |   SL2    |
          | connector        |          | bus/cache slot    |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function               | Jumper  |  Position  |
          |-------------------------------------+---------+------------|
          | » | VESA riser card disabled        | J1 & J2 |   Closed   |
          |---+---------------------------------+---------+------------|
          |   | VESA riser card enabled         | J1 & J2 |    Open    |
          |---+---------------------------------+---------+------------|
          | » | IDE IRQ enabled                 |   J6    | pins 2 & 3 |
          |   |                                 |         |   closed   |
          |---+---------------------------------+---------+------------|
          |   | IDE IRQ disabled                |   J6    | pins 1 & 2 |
          |   |                                 |         |   closed   |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J7    |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | PS/2 mouse (IRQ12) enabled      |   J8    |   Closed   |
          |---+---------------------------------+---------+------------|
          |   | PS/2 mouse (IRQ12) disabled     |   J8    |    Open    |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J9    |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J10   |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | Flash BIOS write protect        |   J11   |   Closed   |
          |   | disabled                        |         |            |
          |---+---------------------------------+---------+------------|
          |   | Flash BIOS write protect        |   J11   |    Open    |
          |   | enabled                         |         |            |
          |---+---------------------------------+---------+------------|
          | » | CPU type select PGA             |   J12   |   Closed   |
          |---+---------------------------------+---------+------------|
          |   | CPU type select PQFP            |   J12   |    Open    |
          |---+---------------------------------+---------+------------|
          | » | CMOS memory normal operation    |   J13   |   Closed   |
          |---+---------------------------------+---------+------------|
          |   | CMOS memory clear               |   J13   |    Open    |
          |---+---------------------------------+---------+------------|
          | » | I/O controller address select   |   J14   |   Closed   |
          |   | 26Eh-26Fh                       |         |            |
          |---+---------------------------------+---------+------------|
          |   | I/O controller address select   |   J14   |    Open    |
          |   | 398h-399h                       |         |            |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J15   |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | On board VGA enabled            |   J16   |   Closed   |
          |---+---------------------------------+---------+------------|
          |   | On board VGA disabled           |   J16   |    Open    |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J17   |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J18   |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J20   |    Open    |
          |   | alter                           |         |            |
          |---+---------------------------------+---------+------------|
          | » | Factory configured - do not     |   J22   |    Open    |
          |   | alter                           |         |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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) 4M x 36 | (1) 1M x 36 |    NONE    |    NONE    |
          |------+-------------+-------------+------------+------------|
          | 24MB | (1) 4M x 36 | (1) 1M x 36 |  (1) 1M x  |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 28MB | (1) 4M x 36 | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 32MB | (1) 4M x 36 | (1) 4M x 36 |    NONE    |    NONE    |
          |------+-------------+-------------+------------+------------|
          | 36MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 1M x  |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 40MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 1M x  |  (1) 1M x  |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 48MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 52MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |  (1) 1M x  |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 64MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |  (1) 4M x  |
          |      |             |             |     36     |     36     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                VESA CPU SPEED CONFIGURATION                |
          |------------------------------------------------------------|
          |       Speed        |        J19        |        J21        |
          |--------------------+-------------------+-------------------|
          |       25MHz        |       Open        |      Closed       |
          |--------------------+-------------------+-------------------|
          |       33MHz        |      Closed       |       Open        |
          |--------------------+-------------------+-------------------|
          |       50iMHz       |       Open        |      Closed       |
          |--------------------+-------------------+-------------------|
          |       66iMHz       |      Closed       |       Open        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VIDEO MEMORY CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Size   |    Bank 0     |   Bank 1    |        CN6         |
          |---------+---------------+-------------+--------------------|
          |  512KB  | (4) 128K x 8  |    NONE     |        NONE        |
          |---------+---------------+-------------+--------------------|
          |   1MB   | (4) 128K x 8  | (4) 128K x  |        NONE        |
          |         |               |      8      |                    |
          |---------+---------------+-------------+--------------------|
          |   2MB   | (4) 128K x 8  | (4) 128K x  |   Memory module    |
          |         |               |      8      |                    |
          |------------------------------------------------------------|
          |      Note: Bank 0 is factory installed and is not          |
          |      configurable. To enable 2MB video memory, install     |
          |      memory module over Bank 1 in CN6 connectors.          |
          +------------------------------------------------------------+