COMPAQ COMPUTER CORPORATION
===========================

   DESKPRO 286 (12MHz)

   Processor             80286                                    
   Processor Speed       12MHz                                    
   Chip Set              ETEQ                                     
   Max. Onboard DRAM     2.125MB                                  
   Cache                 None                                     
   BIOS                  Compaq                                   
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           80287                                    

<gopher://bitreich.org/I/th99/m/C-D/30812-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Fixed drive      |   J109   | Proprietary       |   J116   |
   | power            |          | keyboard          |          |
   |                  |          | connector         |          |
   |------------------+----------+-------------------+----------|
   | Fixed drive/Tape |   J110   | Main power        |   J117   |
   | backup power     |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Floppy drive     |   J111   | External battery  |   J118   |
   | power            |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Floppy drive     |   J112   | Keylock           |   J119   |
   | power            |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Monitor power    |   J113   | Onboard power LED |   LED1   |
   |------------------+----------+-------------------+----------|
   | Speaker          |   J115   |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             | Jumper/Switch | Position |
   |---------------------------------+---------------+----------|
   |>> | Oscillator type select      |      E3       |  Closed  |
   |   | single package              |               |          |
   |---+-----------------------------+---------------+----------|
   |   | Oscillator type select dual |      E3       |   Open   |
   |   | package                     |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | Memory operation generation |      E4       | pins 1 & |
   |   | select discrete gate        |               | 2 closed |
   |---+-----------------------------+---------------+----------|
   |   | Memory operation generation |      E4       | pins 2 & |
   |   | select CBC internal         |               | 3 closed |
   |---+-----------------------------+---------------+----------|
   |>> | Auto slowdown disabled in   |      E5       | pins 1 & |
   |   | software                    |               | 2 closed |
   |---+-----------------------------+---------------+----------|
   |   | Auto slowdown enabled in    |      E5       | pins 2 & |
   |   | software                    |               | 3 closed |
   |---+-----------------------------+---------------+----------|
   |>> | CPU speed select switchable |     SW1/6     |   Off    |
   |   | at keyboard                 |               |          |
   |---+-----------------------------+---------------+----------|
   |   | CPU speed select forced     |     SW1/6     |    On    |
   |   | slow                        |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | Factory configured - do not |     SW1/7     |   Off    |
   |   | alter                       |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | Monitor type select color   |     SW1/8     |    On    |
   |---+-----------------------------+---------------+----------|
   |   | Monitor type select         |     SW1/8     |   Off    |
   |   | monochrome                  |               |          |
   |---+--------------------------------------------------------|
   |   | Notes: Settings for E3, E4, and E5 are accomplished by |
   |   | cutting the conductors on the bottom of the board and  |
   |   | re-soldering the indicated locations.                  |
   |   |                                                        |
   |   | WARNING: Modifying E3, E4, or E5 will void the         |
   |   | manufacturers warranty!                                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size   | Bank | P-0  |  Bank 1  | Bank 2 | Bank 3 | Bank  |
   |         |  0   |      |          |        |        |   4   |
   |---------+------+------+----------+--------+--------+-------|
   |  256KB  | (4)  | (2)  |   (18)   |  NONE  |  NONE  | NONE  |
   |         | 4464 | 4164 |   4164   |        |        |       |
   |---------+------+------+----------+--------+--------+-------|
   |  512KB  | (4)  | (2)  |   (18)   |  (18)  |  (18)  | NONE  |
   |         | 4464 | 4164 |   4164   |  4164  |  4164  |       |
   |---------+------+------+----------+--------+--------+-------|
   |  640KB  | (4)  | (2)  |   (18)   |  (18)  |  (18)  | (18)  |
   |         | 4464 | 4164 |   4164   |  4164  |  4164  | 4164  |
   |---------+------+------+----------+--------+--------+-------|
   |  640KB  | (4)  | (2)  |   (18)   |  NONE  |  NONE  | NONE  |
   |         | 4464 | 4164 |  41256   |        |        |       |
   |---------+------+------+----------+--------+--------+-------|
   | 1.125MB | (4)  | (2)  |   (18)   |  (18)  |  NONE  | NONE  |
   |         | 4464 | 4164 |  41256   | 41256  |        |       |
   |---------+------+------+----------+--------+--------+-------|
   | 1.625MB | (4)  | (2)  |   (18)   |  (18)  |  (18)  | NONE  |
   |         | 4464 | 4164 |  41256   | 41256  | 41256  |       |
   |---------+------+------+----------+--------+--------+-------|
   | 2.125MB | (4)  | (2)  |   (18)   |  (18)  |  (18)  | (18)  |
   |         | 4464 | 4164 |  41256   | 41256  | 41256  | 41256 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM SWITCH CONFIGURATION                  |
   |------------------------------------------------------------|
   |   Size   |  SW1/1  |  SW1/2  |  SW1/3  |  SW1/4  |  SW1/5  |
   |----------+---------+---------+---------+---------+---------|
   | Disabled |   N/A   |   On    |   On    |   N/A   |   N/A   |
   |----------+---------+---------+---------+---------+---------|
   |  256KB   |   On    |   On    |   Off   |   Off   |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |  512KB   |   On    |   Off   |   On    |   Off   |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |  640KB   |   On    |   Off   |   Off   |   Off   |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |  640KB   |   Off   |   Off   |   Off   |   On    |   On    |
   |----------+---------+---------+---------+---------+---------|
   | 1.125MB  |   Off   |   Off   |   Off   |   On    |   Off   |
   |----------+---------+---------+---------+---------+---------|
   | 1.625MB  |   Off   |   Off   |   Off   |   Off   |   On    |
   |----------+---------+---------+---------+---------+---------|
   | 2.125MB  |   Off   |   Off   |   Off   |   Off   |   Off   |
   |------------------------------------------------------------|
   | Notes: Closing both SW1/switch 2 and SW1/switch 3,         |
   | disables banks 0 & 1 and any onboard ROM.                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  ROM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |  ROM type   |    Size    |   BIOS ROM/E1    | ROM set 2/E2 |
   |-------------+------------+------------------+--------------|
   |   Static    |   8K x 8   | 1 & 2, 4 & 5, 7  |  1 & 2, 4 &  |
   |             |            |       & 8        |   5, 7 & 8   |
   |-------------+------------+------------------+--------------|
   |   Static    |  16K x 8   | 2 & 3, 4 & 5, 7  |  2 & 3, 4 &  |
   |             |            |       & 8        |   5, 7 & 8   |
   |-------------+------------+------------------+--------------|
   |   Static    |  32K x 8   | 2 & 3, 4 & 5, 7  |  2 & 3, 5 &  |
   |             |            |       & 8        |   6, 7 & 8   |
   |-------------+------------+------------------+--------------|
   |   Dynamic   |   8K x 8   | 1 & 2, 4 & 5, 8  |  1 & 2, 4 &  |
   |             |            |       & 9        |   5, 8 & 9   |
   |-------------+------------+------------------+--------------|
   |   Dynamic   |  16K x 8   | 2 & 3, 4 & 5, 8  |  2 & 3, 4 &  |
   |             |            |       & 9        |   5, 8 & 9   |
   |-------------+------------+------------------+--------------|
   |   Dynamic   |  32K x 8   | 2 & 3, 5 & 6, 8  |  2 & 3, 5 &  |
   |             |            |       & 9        |   6, 8 & 9   |
   |------------------------------------------------------------|
   | Notes: Settings are accomplished by cutting the conductors |
   | on the bottom of the board and re-soldering the indicated  |
   | locations. Pins designated should be in the closed         |
   | position.                                                  |
   |                                                            |
   | WARNING: Modifying the factory configurations will void    |
   | the manufacturers warranty!                                |
   +------------------------------------------------------------+