(TXT) View Source
       
       # DELL COMPUTER CORPORATION
       
          SYSTEM 486P
       
          Processor        80486DX                                       
          Processor Speed  16/20/25/33MHz                                
          Chip Set         VLSI                                          
          Max. Onboard     64MB                                          
          DRAM             
          Cache            None                                          
          BIOS             Phoenix                                       
          Dimensions       349mm x 185mm                                 
          I/O Options      Bus mouse port, floppy interface, IDE         
                           interface, parallel port, riser card slot,    
                           serial ports (2), video upgrade socket, VGA   
                           port                                          
          NPU Options      None                                          
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose            | Location | Purpose         | Location |
          |--------------------+----------+-----------------+----------|
          | 16-bit riser card  |   EXP1   | Auxiliary       |   GND    |
          |                    |          | ground points   |          |
          |--------------------+----------+-----------------+----------|
          | IDE interface LED  |  JHDLED  | IDE interface   |   JIDE   |
          |--------------------+----------+-----------------+----------|
          | External battery   |   JBAT   | Power LED &     |   JLED   |
          |                    |          | turbo LED       |          |
          |--------------------+----------+-----------------+----------|
          | Serial port 1      |  JCOM1   | Parallel port   |  JLPT1   |
          |--------------------+----------+-----------------+----------|
          | Serial port 2      |  JCOM2   | Bus mouse port  |  JMOUSE  |
          |--------------------+----------+-----------------+----------|
          | Cooling fan power  |   JFAN   | VGA memory      |   JVDB   |
          |                    |          | upgrade socket  |          |
          |--------------------+----------+-----------------+----------|
          | VGA pass-through   |  JFEAT   | Front panel     |  JVIEW   |
          |                    |          | status LCD      |          |
          |--------------------+----------+-----------------+----------|
          | Floppy drive       |  JFLOP   | VGA port        |   JVGA   |
          | interface          |          |                 |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function              |   Jumper   | Position |
          |------------------------------------+------------+----------|
          | » | VGA interrupt request select   | JP5 pins 1 |  Closed  |
          |   | none                           |    & 2     |          |
          |---+--------------------------------+------------+----------|
          |   | VGA interrupt request select   | JP5 pins 1 |   Open   |
          |   | IRQ9                           |    & 2     |          |
          |---+--------------------------------+------------+----------|
          | » | Monitor type select color      | JP5 pins 3 |  Closed  |
          |   |                                |    & 4     |          |
          |---+--------------------------------+------------+----------|
          |   | Monitor type select monochrome | JP5 pins 3 |   Open   |
          |   |                                |    & 4     |          |
          |---+--------------------------------+------------+----------|
          | » | Factory configured - do not    | JP5 pins 5 |   Open   |
          |   | alter                          |    & 6     |          |
          |---+--------------------------------+------------+----------|
          | » | Factory configured - do not    | JP5 pins 7 |   Open   |
          |   | alter                          |    & 8     |          |
          |---+--------------------------------+------------+----------|
          | » | Password check enabled         | JP5 pins 9 |  Closed  |
          |   |                                |    & 10    |          |
          |---+--------------------------------+------------+----------|
          |   | Password check disabled        | JP5 pins 9 |   Open   |
          |   |                                |    & 10    |          |
          |---+--------------------------------+------------+----------|
          | » | Mouse port enabled (uses       |  JP5 pins  |  Closed  |
          |   | IRQ12)                         |  11 & 12   |          |
          |---+--------------------------------+------------+----------|
          |   | Mouse port disabled (IRQ12 not |  JP5 pins  |   Open   |
          |   | used)                          |  11 & 12   |          |
          |---+--------------------------------+------------+----------|
          | » | IOCHRDY signal disabled to IDE |  JP5 pins  |  Closed  |
          |   | drive(s)                       |  13 & 14   |          |
          |   |                                |            |   Open   |
          |   |                                |  JP5 pins  |          |
          |   |                                |  15 & 16   |          |
          |---+--------------------------------+------------+----------|
          |   | IOCHRDY signal enabled to IDE  |  JP5 pins  |   Open   |
          |   | drive(s)                       |  13 & 14   |          |
          |   |                                |            |  Closed  |
          |   |                                |  JP5 pins  |          |
          |   |                                |  15 & 16   |          |
          |---+--------------------------------+------------+----------|
          | » | Bus wait states select none    |  JP5 pins  |  Closed  |
          |   |                                |  17 & 18   |          |
          |---+--------------------------------+------------+----------|
          |   | Bus wait state select one      |  JP5 pins  |   Open   |
          |   |                                |  17 & 18   |          |
          |---+--------------------------------+------------+----------|
          | » | Factory configured - do not    |  JP5 pins  |   Open   |
          |   | alter                          |  19 & 20   |          |
          |---+--------------------------------+------------+----------|
          | » | Factory configured - do not    |    CLRB    |   Open   |
          |   | alter                          |            |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
          |------+-------------+-------------+------------+------------|
          | 1MB  | (1) 256K x  |    NONE     |    NONE    |    NONE    |
          |      |     36      |             |            |            |
          |------+-------------+-------------+------------+------------|
          | 2MB  | (1) 256K x  | (1) 256K x  |    NONE    |    NONE    |
          |      |     36      |     36      |            |            |
          |------+-------------+-------------+------------+------------|
          | 3MB  | (1) 256K x  | (1) 256K x  | (1) 256K x |    NONE    |
          |      |     36      |     36      |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 4MB  | (1) 256K x  | (1) 256K x  | (1) 256K x | (1) 256K x |
          |      |     36      |     36      |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 4MB  | (1) 1M x 36 |    NONE     |    NONE    |    NONE    |
          |------+-------------+-------------+------------+------------|
          | 5MB  | (1) 1M x 36 | (1) 256K x  |    NONE    |    NONE    |
          |      |             |     36      |            |            |
          |------+-------------+-------------+------------+------------|
          | 6MB  | (1) 1M x 36 | (1) 256K x  | (1) 256K x |    NONE    |
          |      |             |     36      |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 7MB  | (1) 1M x 36 | (1) 256K x  | (1) 256K x | (1) 256K x |
          |      |             |     36      |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 8MB  | (1) 1M x 36 | (1) 1M x 36 |    NONE    |    NONE    |
          |------+-------------+-------------+------------+------------|
          | 9MB  | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 12MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 13MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  | (1) 256K x |
          |      |             |             |     36     |     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    |
          |------+-------------+-------------+------------+------------|
          | 17MB | (1) 4M x 36 | (1) 256K x  |    NONE    |    NONE    |
          |      |             |     36      |            |            |
          |------+-------------+-------------+------------+------------|
          | 18MB | (1) 4M x 36 | (1) 256K x  | (1) 256K x |    NONE    |
          |      |             |     36      |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 19MB | (1) 4M x 36 | (1) 256K x  | (1) 256K x | (1) 256K x |
          |      |             |     36      |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 20MB | (1) 4M x 36 | (1) 1M x 36 |    NONE    |    NONE    |
          |------+-------------+-------------+------------+------------|
          | 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 24MB | (1) 4M x 36 | (1) 1M x 36 |  (1) 1M x  |    NONE    |
          |      |             |             |     36     |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM CONFIGURATION (CON’T)                 |
          |------------------------------------------------------------|
          | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
          |------+-------------+-------------+------------+------------|
          | 25MB | (1) 4M x 36 | (1) 1M x 36 |  (1) 1M x  | (1) 256K x |
          |      |             |             |     36     |     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    |
          |------+-------------+-------------+------------+------------|
          | 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 36MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 1M x  |    NONE    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 37MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 1M x  | (1) 256K x |
          |      |             |             |     36     |     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     |            |
          |------+-------------+-------------+------------+------------|
          | 49MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  | (1) 256K x |
          |      |             |             |     36     |     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     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Speed   |    JP1     |    JP2    |    JP3    |    JP4    |
          |-----------+------------+-----------+-----------+-----------|
          |   16MHz   |   Closed   |   Open    |   Open    |   Open    |
          |-----------+------------+-----------+-----------+-----------|
          |   20MHz   |    Open    |  Closed   |   Open    |   Open    |
          |-----------+------------+-----------+-----------+-----------|
          |   25MHz   |    Open    |   Open    |  Closed   |   Open    |
          |-----------+------------+-----------+-----------+-----------|
          |   33MHz   |    Open    |   Open    |   Open    |  Closed   |
          +------------------------------------------------------------+