(TXT) View Source
       
       # DELL COMPUTER CORPORATION
       
          SYSTEM 486/T
       
       Processor  80486SX/80487SX/80486DX/ODP486SX/80486DX2/ODP586SX                 
       Processor  16/20/25/32(internal)/33/40(internal)/40/50(internal)/66(internal) 
       Speed      
       Chip Set   Headland                                                           
       Max.       64MB                                                               
       Onboard    
       DRAM       
       SRAM Cache 128KB (on optional card)                                           
       BIOS       AMI                                                                
       Dimensions 330mm x 218mm                                                      
       I/O        Floppy drive interface, IDE interface, bus mouse port              
       Options                                                                       
                  parallel port, serial port (2), VGA feature connector, VGA port    
                                                                                     
                  video memory module connection                                     
       NPU        None                                                               
       Options    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | VGA port          |    C1    | External cache   |    S1    |
          |                   |          | card             |          |
          |-------------------+----------+------------------+----------|
          | Bus mouse         |    C2    | External battery |    J1    |
          |-------------------+----------+------------------+----------|
          | Parallel port     |   JPAR   | IDE interface    |    J2    |
          |                   |          | LED              |          |
          |-------------------+----------+------------------+----------|
          | Serial port 1 & 2 |   JCOM   | Speaker          |    J3    |
          |-------------------+----------+------------------+----------|
          | Floppy drive      |  JFLOP   | Fan              |    J4    |
          | interface         |          |                  |          |
          |-------------------+----------+------------------+----------|
          | IDE drive         |   JIDE   | Video memory     |  JVMEM1  |
          | interface         |          | upgrade module   |          |
          |-------------------+----------+------------------+----------|
          | VGA feature       |  JFEAT   | Video memory     |  JVMEM2  |
          | connector         |          | upgrade module   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                Function                | Jumper | Position |
          |----------------------------------------+--------+----------|
          | » | External cache enabled             | JCACHE |  closed  |
          |---+------------------------------------+--------+----------|
          |   | External cache disabled            | JCACHE |   open   |
          |---+------------------------------------+--------+----------|
          | » | Password option enabled            |  EPWD  |  closed  |
          |---+------------------------------------+--------+----------|
          |   | Password option disabled           |  EPWD  |   open   |
          |---+------------------------------------+--------+----------|
          | » | Factory configured - do not alter  | IOALT  |   open   |
          |---+------------------------------------+--------+----------|
          | » | Flash BIOS upgrade enabled         |  EFLU  |  closed  |
          |---+------------------------------------+--------+----------|
          |   | Flash BIOS upgrade disabled (BIOS  |  EFLU  |   open   |
          |   | write protected)                   |        |          |
          |---+------------------------------------+--------+----------|
          | » | On board VGA interface enabled     |  EVGA  |  closed  |
          |---+------------------------------------+--------+----------|
          |   | On board VGA interface disabled    |  EVGA  |   open   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU SPEED CONFIGURATION (JP1)                |
          |------------------------------------------------------------|
          | Speed | pins 1 & | pins 3 & | pins 5 & | pins 7  | pins 9  |
          |       |    2     |    4     |    6     |   & 8   |  & 10   |
          |-------+----------+----------+----------+---------+---------|
          | 16MHz |  closed  |   open   |   open   |  open   |  open   |
          |-------+----------+----------+----------+---------+---------|
          | 20MHz |   open   |  closed  |   open   |  open   |  open   |
          |-------+----------+----------+----------+---------+---------|
          | 25MHz |   open   |   open   |  closed  |  open   |  open   |
          |-------+----------+----------+----------+---------+---------|
          | 33MHz |   open   |   open   |   open   | closed  |  open   |
          |-------+----------+----------+----------+---------+---------|
          | 40MHz |   open   |   open   |   open   |  open   | 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) 4M x 36 | (1) 1M x 36 |    NONE    |    NONE    |
          |------+-------------+-------------+------------+------------|
          | 24MB | (1) 4M x 36 | (1) 1M x 36 |  (1) 1M x  |    NONE    |
          |      |             |             |     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     |            |
          |------+-------------+-------------+------------+------------|
          | 64MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |  (1) 4M x  |
          |      |             |             |     36     |     36     |
          +------------------------------------------------------------+