DELL COMPUTER CORPORATION
=========================

   Precision 386SX/16, Precision 386SX/25

   Processor        80386SX                                       
   Processor Speed  16/25MHz                                      
   Chip Set         VLSI                                          
   Max. Onboard     16MB                                          
   DRAM             
   Cache            None                                          
   BIOS             AMI                                           
   Dimensions       330mm x 218mm                                 
   I/O Options      Bus mouse port, floppy interface, IDE         
                    interface, parallel port, serial ports (2),   
                    VGA port                                      
   NPU Options      80387SX                                       

<gopher://bitreich.org/I/th99/m/C-D/30904-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose              | Location | Purpose       | Location |
   |----------------------+----------+---------------+----------|
   | Internal battery     |   BAT    | Bus mouse     |   MSE    |
   | holder               |          |               |          |
   |----------------------+----------+---------------+----------|
   | Serial port 1        |   COM1   | Power LED &   |   PLK    |
   |                      |          | keylock       |          |
   |----------------------+----------+---------------+----------|
   | Serial port 2        |   COM2   | Reset switch  |   RST    |
   |----------------------+----------+---------------+----------|
   | Floppy drive         |   FDD    | Speaker       |   SPK    |
   | interface            |          |               |          |
   |----------------------+----------+---------------+----------|
   | IDE interface LED    |   HDL    | Turbo LED     |   TLD    |
   |----------------------+----------+---------------+----------|
   | IDE interface        |   IDE    | VGA port      |   VGA    |
   |----------------------+----------+---------------+----------|
   | Parallel port        |   LPT    |               |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | VGA interrupt request     |      JP1      | pins 1 & 2 |
   |   | select none               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | VGA interrupt request     |      JP1      | pins 2 & 3 |
   |   | select IRQ9               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | VGA port enabled          |      JP2      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | VGA port disabled         |      JP2      | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | IDE drives installed      |      JP3      | pins 1 & 2 |
   |   | select one                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | IDE drives installed      |      JP3      | pins 2 & 3 |
   |   | select two                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Pipeline mode enabled     |      JP4      | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Pipeline mode disabled    |      JP4      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Floppy drive interface    |      JP5      | pins 1 & 2 |
   |   | disk change signal        |               |   closed   |
   |   | disabled                  |               |            |
   |---+---------------------------+---------------+------------|
   |   | Floppy drive interface    |      JP5      | pins 2 & 3 |
   |   | disk change signal        |               |   closed   |
   |   | enabled                   |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select color |      JP6      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select       |      JP6      | pins 2 & 3 |
   |   | monochrome                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | CMOS memory normal        |      JP7      | pins 2 & 3 |
   |   | operation                 |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | CMOS memory clear         |      JP7      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select       |     SW1/1     |    Off     |
   |   | standard VGA              |               |            |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select NEC   |     SW1/1     |     On     |
   |   | MultiSync I (only)        |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select PS/2  |     SW1/2     |     On     |
   |   | style VGA                 |               |            |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select AT    |     SW1/2     |    Off     |
   |   | style VGA                 |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select 1024  |     SW1/5     |     On     |
   |   | x 768 interlaced          |               |            |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select 1024  |     SW1/5     |    Off     |
   |   | x 768 non-interlaced      |               |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |     Size     |         Bank 0         |       Bank 1       |
   |--------------+------------------------+--------------------|
   |    512KB     |      (2) 256K x 9      |        NONE        |
   |--------------+------------------------+--------------------|
   |     1MB      |      (2) 256K x 9      |    (2) 256K x 9    |
   |--------------+------------------------+--------------------|
   |     2MB      |       (2) 1M x 9       |        NONE        |
   |--------------+------------------------+--------------------|
   |    2.5MB     |       (2) 1M x 9       |    (2) 256K x 9    |
   |--------------+------------------------+--------------------|
   |     4MB      |       (2) 1M x 9       |     (2) 1M x 9     |
   |--------------+------------------------+--------------------|
   |     8MB      |       (2) 4M x 9       |        NONE        |
   |--------------+------------------------+--------------------|
   |    8.5MB     |       (2) 4M x 9       |    (2) 256K x 9    |
   |--------------+------------------------+--------------------|
   |     10MB     |       (2) 4M x 9       |     (2) 1M x 9     |
   |--------------+------------------------+--------------------|
   |     16MB     |       (2) 4M x 9       |     (2) 4M x 9     |
   |------------------------------------------------------------|
   | Note:The on-board VGA interface will not function with     |
   | less than 1MB of DRAM installed                            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VGA REFRESH CONFIGURATION                  |
   |------------------------------------------------------------|
   |                Refresh rate                | SW1/3 | SW1/4 |
   |--------------------------------------------+-------+-------|
   |>> | 800 x 600 x 16 at 56Hz or 800 x 600 x  |  On   |  On   |
   |   |              256 at 56Hz               |       |       |
   |---+----------------------------------------+-------+-------|
   |   | 800 x 600 x 16 at 72Hz or 800 x 600 x  |  On   |  Off  |
   |   |              256 at 56Hz               |       |       |
   |---+----------------------------------------+-------+-------|
   |   | 800 x 600 x 16 at 60Hz or 800 x 600 x  |  Off  |  On   |
   |   |              256 at 60Hz               |       |       |
   |---+----------------------------------------+-------+-------|
   |   | 800 x 600 x 16 at 72Hz or 800 x 600 x  |  Off  |  Off  |
   |   |              256 at 60Hz               |       |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     VRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |           256KB            |             NONE              |
   |----------------------------+-------------------------------|
   |           512KB            |        (2) 44256 ZIPPs        |
   +------------------------------------------------------------+