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

   SYSTEM V486/XX REV. 1

   Processor         80486SX/80486DX/80486DX2/Overdrive           
   Processor Speed   25/33/50(internal)/66(internal)MHz           
   Chip Set          Opti                                         
   Max. Onboard DRAM 32MB                                         
   Cache             64/256KB                                     
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/C-D/31954-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |    J9    | Speaker           |   J21    |
   |------------------+----------+-------------------+----------|
   | External battery |   J18    | Power LED and     |   J22    |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | Turbo Switch     |   J20    |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Battery type select - internal   |   W1   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery type select - external   |   W1   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |   W2   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |   W2   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W3   | pins 2 & 3 |
   |   | alter                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W4   | pins 2 & 3 |
   |   | alter                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  W12   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  W12   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  W13   |    Open    |
   |   | alter                            |        |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            64KB            |          (8) 16K x4           |
   |----------------------------+-------------------------------|
   |           256KB            |          (8) 32K x 8          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |       W8        |       W9        |      W10       |
   |-------+-----------------+-----------------+----------------|
   |  0KB  |      Open       |      Open       |      Open      |
   |-------+-----------------+-----------------+----------------|
   | 64KB  |   pins 2 & 3    |   pins 2 & 3    |   pins 2 & 3   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 256KB |   pins 1 & 2    |   pins 1 & 2    |   pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      CPU TYPE SELECT                       |
   |------------------------------------------------------------|
   | CPU type  |       W5       |      W6       |      W7       |
   |-----------+----------------+---------------+---------------|
   |   486SX   |   pins 2 & 3   |  pins 2 & 3   |     Open      |
   |           |     closed     |    closed     |               |
   |-----------+----------------+---------------+---------------|
   |   487SX   |   pins 1 & 2   |  pins 1 & 2   |  pins 1 & 2   |
   |           |     closed     |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   |   486DX   |   pins 1 & 2   |  pins 1 & 2   |  pins 2 & 3   |
   |           |     closed     |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   |  486DX2   |   pins 1 & 2   |  pins 1 & 2   |  pins 2 & 3   |
   |           |     closed     |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   | Overdrive |   pins 1 & 2   |  pins 1 & 2   |  pins 1 & 2   |
   |           |     closed     |    closed     |    closed     |
   +------------------------------------------------------------+