(TXT) View Source
       
       # DELL COMPUTER CORPORATION
       
          System 4XXDE
       
          Processor        80486SX/80487SX/80486DX                       
          Processor Speed  20/25/33/50MHz                                
          Chip Set         VLSI                                          
          Max. Onboard     48MB (96MB on revision 1.1 or higher)         
          DRAM             
          Cache            None (128KB on 450DE and 433DE)               
          BIOS             AMI                                           
          Dimensions       329mm x 334mm                                 
          I/O Options      32-bit external CPU card slot, bus mouse,     
                           floppy drive interface, IDE interface, status 
                           LCD, parallel port, serial ports (2), VGA     
                           port                                          
          NPU Options      None (4167 on 433DE)                          
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose         | Location | Purpose            | Location |
          |-----------------+----------+--------------------+----------|
          | VGA port        |   CN1    | External battery   |   JBAT   |
          |-----------------+----------+--------------------+----------|
          | Parallel port   |   CN2    | Cooling fan        |   JFAN   |
          |-----------------+----------+--------------------+----------|
          | Serial port 2   |   CN3    | VGA pass-through   |  JFEAT   |
          |-----------------+----------+--------------------+----------|
          | Serial port 1   |   CN4    | Primary floppy     |  JFLOP   |
          |                 |          | drive interface    |          |
          |-----------------+----------+--------------------+----------|
          | Bus mouse port  |   CN5    | IDE interface      |   JIDE   |
          |-----------------+----------+--------------------+----------|
          | Board ground    |   GND    | Front panel status |  JVIEW   |
          | points          |          | LCD                |          |
          |-----------------+----------+--------------------+----------|
          | IDE interface   |   JLED   | Reset switch       |   RSET   |
          | LED             |          |                    |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |            Function             | Jumper/Switch | Position |
          |---------------------------------+---------------+----------|
          | » | Boot EEPROM write/clear     |     BOOT      |  Closed  |
          |   | enabled                     |               |          |
          |---+-----------------------------+---------------+----------|
          |   | Boot EEPROM write/clear     |     BOOT      |   Open   |
          |   | disabled                    |               |          |
          |---+-----------------------------+---------------+----------|
          | » | Factory test disabled       |      MNT      |   Open   |
          |---+-----------------------------+---------------+----------|
          |   | Factory test enabled        |      MNT      |  Closed  |
          |---+-----------------------------+---------------+----------|
          | » | VGA interface enabled       |     SW1/1     |   Off    |
          |---+-----------------------------+---------------+----------|
          |   | VGA interface disabled      |     SW1/1     |    On    |
          |---+-----------------------------+---------------+----------|
          | » | Monitor type select fixed   |     SW1/2     |   Off    |
          |   | frequency                   |               |          |
          |---+-----------------------------+---------------+----------|
          |   | Monitor type select multi   |     SW1/2     |    On    |
          |   | frequency                   |               |          |
          |---+-----------------------------+---------------+----------|
          | » | Password check enabled      |     SW1/3     |    On    |
          |---+-----------------------------+---------------+----------|
          |   | Password check disabled     |     SW1/3     |   Off    |
          |---+-----------------------------+---------------+----------|
          | » | BIOS chip select flash      |     SW1/4     |   Off    |
          |   | EEPROM                      |               |          |
          |---+-----------------------------+---------------+----------|
          |   | BIOS chip select auxiliary  |     SW1/4     |    On    |
          |   | ROM                         |               |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |Size|  Bank 0   | Bank 1  | Bank 2 | Bank 3 |Bank 4 |Bank 5 |
          |----+-----------+---------+--------+--------+-------+-------|
          |4MB | (1)512K x |(1)512K x|  NONE  |  NONE  | NONE  | NONE  |
          |    |    36     |   36    |        |        |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |6MB | (1)512K x |(1)512K x|(1)256K |(1)256K | NONE  | NONE  |
          |    |    36     |   36    |  x 36  |  x 36  |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |6MB | (1)256K x |(1)256K x|(1)256K |(1)256K |(1)256K|(1)256K|
          |    |    36     |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |8MB | (1)512K x |(1)512K x|(1)256K |(1)256K |(1)256K|(1)256K|
          |    |    36     |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |8MB | (1)512K x |(1)512K x|(1)512K |(1)512K | NONE  | NONE  |
          |    |    36     |   36    |  x 36  |  x 36  |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |8MB |(1) 1M x 36|(1) 1M x |  NONE  |  NONE  | NONE  | NONE  |
          |    |           |   36    |        |        |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |10MB| (1)512K x |(1)512K x|(1)512K |(1)512K |(1)256K|(1)256K|
          |    |    36     |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |10MB|(1) 1M x 36|(1) 1M x |(1)256K |(1)256K | NONE  | NONE  |
          |    |           |   36    |  x 36  |  x 36  |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |12MB|(1) 1M x 36|(1) 1M x |(1)256K |(1)256K |(1)256K|(1)256K|
          |    |           |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |12MB|(1) 1M x 36|(1) 1M x |(1)512K |(1)512K | NONE  | NONE  |
          |    |           |   36    |  x 36  |  x 36  |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |12MB| (1)512K x |(1)512K x|(1)512K |(1)512K |(1)512K|(1)512K|
          |    |    36     |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |14MB|(1) 1M x 36|(1) 1M x |(1)512K |(1)512K |(1)256K|(1)256K|
          |    |           |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |16MB|(1) 1M x 36|(1) 1M x |(1)512K |(1)512K |(1)512K|(1)512K|
          |    |           |   36    |  x 36  |  x 36  | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |16MB|(1) 1M x 36|(1) 1M x |(1) 1M x|(1) 1M x| NONE  | NONE  |
          |    |           |   36    |   36   |   36   |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |16MB|(1) 2M x 36|(1) 2M x |  NONE  |  NONE  | NONE  | NONE  |
          |    |           |   36    |        |        |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |18MB|(1) 1M x 36|(1) 1M x |(1) 1M x|(1) 1M x|(1)256K|(1)256K|
          |    |           |   36    |   36   |   36   | x 36  | x 36  |
          |----+-----------+---------+--------+--------+-------+-------|
          |18MB|(1) 2M x 36|(1) 2M x |(1)256K |(1)256K | NONE  | NONE  |
          |    |           |   36    |  x 36  |  x 36  |       |       |
          |----+-----------+---------+--------+--------+-------+-------|
          |20MB|(1) 2M x 36|(1) 2M x |(1)256K |(1)256K |(1)256K|(1)256K|
          |    |           |   36    |  x 36  |  x 36  | x 36  | x 36  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM CONFIGURATION (CON’T)                 |
          |------------------------------------------------------------|
          | Size | Bank | Bank | Bank 2  | Bank 3  | Bank 4  | Bank 5  |
          |      |  0   |  1   |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 20MB | (1)  | (1)  | (1) 1M  | (1) 1M  | (1)512K | (1)512K |
          |      | 1M x | 1M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 20MB | (1)  | (1)  | (1)512K | (1)512K |  NONE   |  NONE   |
          |      | 2M x | 2M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 22MB | (1)  | (1)  | (1)512K | (1)512K | (1)256K | (1)256K |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 24MB | (1)  | (1)  | (1) 1M  | (1) 1M  |  NONE   |  NONE   |
          |      | 2M x | 2M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 24MB | (1)  | (1)  | (1)512K | (1)512K | (1)512K | (1)512K |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 26MB | (1)  | (1)  | (1) 1M  | (1) 1M  | (1)256K | (1)256K |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 28MB | (1)  | (1)  | (1) 1M  | (1) 1M  | (1)512K | (1)512K |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 32MB | (1)  | (1)  | (1) 2M  | (1) 2M  |  NONE   |  NONE   |
          |      | 2M x | 2M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 32MB | (1)  | (1)  | (1) 1M  | (1) 1M  | (1) 1M  | (1) 1M  |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 32MB | (1)  | (1)  |  NONE   |  NONE   |  NONE   |  NONE   |
          |      | 4M x | 4M x |         |         |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 34MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1)256K | (1)256K |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 34MB | (1)  | (1)  | (1)256K | (1)256K |  NONE   |  NONE   |
          |      | 4M x | 4M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 36MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1)512K | (1)512K |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 38MB | (1)  | (1)  | (1)512K | (1)512K | (1)256K | (1)256K |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 40MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1) 1M  | (1) 1M  |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 40MB | (1)  | (1)  | (1) 1M  | (1) 1M  |  NONE   |  NONE   |
          |      | 4M x | 4M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 42MB | (1)  | (1)  | (1) 1M  | (1) 1M  | (1)256K | (1)256K |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 48MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1) 2M  | (1) 2M  |
          |      | 2M x | 2M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 48MB | (1)  | (1)  | (1) 2M  | (1) 2M  |  NONE   |  NONE   |
          |      | 4M x | 4M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 50MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1)256K | (1)256K |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 52MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1)512K | (1)512K |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 56MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1) 1M  | (1) 1M  |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 64MB | (1)  | (1)  | (1) 2M  | (1) 2M  | (1) 2M  | (1) 2M  |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 64MB | (1)  | (1)  | (1) 4M  | (1) 4M  |  NONE   |  NONE   |
          |      | 4M x | 4M x |  x 36   |  x 36   |         |         |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 66MB | (1)  | (1)  | (1) 4M  | (1) 4M  | (1)256K | (1)256K |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 68MB | (1)  | (1)  | (1) 4M  | (1) 4M  | (1)512K | (1)512K |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 72MB | (1)  | (1)  | (1) 4M  | (1) 4M  | (1) 1M  | (1) 1M  |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 80MB | (1)  | (1)  | (1) 4M  | (1) 4M  | (1) 2M  | (1) 2M  |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          |------+------+------+---------+---------+---------+---------|
          | 96MB | (1)  | (1)  | (1) 4M  | (1) 4M  | (1) 4M  | (1) 4M  |
          |      | 4M x | 4M x |  x 36   |  x 36   |  x 36   |  x 36   |
          |      |  36  |  36  |         |         |         |         |
          +------------------------------------------------------------+