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

   PRESARIO 700/900 SERIES

Processor  80486SX2/80486DX/80486DX2/80486DX4/Pentium Overdrive          
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz 
Speed      
Chip Set   Compaq                                                        
Max.       100MB                                                         
Onboard    
DRAM       
Cache      128KB (on external cache card)                                
BIOS       Unidentified                                                  
Dimensions 330mm x 218mm                                                 
I/O        External cache card, game port, parallel port, PS/2 mouse     
Options    port, serial ports (2), VGA feature connector, line in port,  
           line out port, microphone port, VGA port, CD-ROM line in, TV  
           board line in                                                 
NPU        None                                                          
Options    

<gopher://bitreich.org/I/th99/m/C-D/32403-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location | Purpose            | Location |
   |-----------------+----------+--------------------+----------|
   | Parallel port   |   CN1    | VGA port           |   CN10   |
   |-----------------+----------+--------------------+----------|
   | Game port       |   CN2    | Serial port 2      |    J2    |
   |-----------------+----------+--------------------+----------|
   | Line in port    |   CN3    | Video upgrade      | J4 & J6  |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Line out port   |   CN4    | CD-ROM line in     |   J10    |
   |-----------------+----------+--------------------+----------|
   | Microphone port |   CN5    | External battery   |   J11    |
   |-----------------+----------+--------------------+----------|
   | Speaker         |   CN6    | TV board line in   |   J16    |
   |-----------------+----------+--------------------+----------|
   | PS/2 mouse port |   CN7    | VGA feature        |   J20    |
   |                 |          | connector          |          |
   |-----------------+----------+--------------------+----------|
   | Keyboard        |   CN8    | External cache     |   SL1    |
   |                 |          | card               |          |
   |-----------------+----------+--------------------+----------|
   | Serial port 1   |   CN9    |                    |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Factory configured - do not      |   J7   |    Open    |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Cache type select write through  |   P3   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Cache type select write back     |   P3   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |   P5   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |   P5   |    Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |   Bank 0   |   Bank 1   |   Bank 2   |   Bank 3   |
   |--------+------------+------------+------------+------------|
   |  4MB   | (8) 411000 |    NONE    |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   |  8MB   | (8) 411000 |  (1) 1M x  |    NONE    |    NONE    |
   |        |            |     36     |            |            |
   |--------+------------+------------+------------+------------|
   |  12MB  | (8) 411000 |  (1) 1M x  |  (1) 1M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  12MB  | (8) 411000 |  (1) 2M x  |    NONE    |    NONE    |
   |        |            |     36     |            |            |
   |--------+------------+------------+------------+------------|
   |  16MB  | (8) 411000 |  (1) 1M x  |  (1) 1M x  |  (1) 1M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  16MB  | (8) 411000 |  (1) 1M x  |  (1) 2M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  16MB  | (8) 411000 |  (1) 2M x  |  (1) 1M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  20MB  | (8) 411000 |  (1) 2M x  |  (1) 1M x  |  (1) 1M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  20MB  | (8) 411000 |  (1) 2M x  |  (1) 2M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  20MB  | (8) 411000 |  (1) 4M x  |    NONE    |    NONE    |
   |        |            |     36     |            |            |
   |--------+------------+------------+------------+------------|
   |  24MB  | (8) 411000 |  (1) 1M x  |  (1) 2M x  |  (1) 2M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  24MB  | (8) 411000 |  (1) 1M x  |  (1) 4M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  24MB  | (8) 411000 |  (1) 4M x  |  (1) 1M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  28MB  | (8) 411000 |  (1) 2M x  |  (1) 2M x  |  (1) 2M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  28MB  | (8) 411000 |  (1) 2M x  |  (1) 4M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  28MB  | (8) 411000 |  (1) 4M x  |  (1) 1M x  |  (1) 1M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  28MB  | (8) 411000 |  (1) 4M x  |  (1) 2M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  36MB  | (8) 411000 |  (1) 4M x  |  (1) 2M x  |  (1) 2M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  36MB  | (8) 411000 |  (1) 8M x  |    NONE    |    NONE    |
   |        |            |     36     |            |            |
   |--------+------------+------------+------------+------------|
   |  40MB  | (8) 411000 |  (1) 1M x  |  (1) 4M x  |  (1) 4M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  40MB  | (8) 411000 |  (1) 1M x  |  (1) 8M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  40MB  | (8) 411000 |  (1) 8M x  |  (1) 1M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  44MB  | (8) 411000 |  (1) 2M x  |  (1) 4M x  |  (1) 4M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  44MB  | (8) 411000 |  (1) 2M x  |  (1) 8M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  44MB  | (8) 411000 |  (1) 8M x  |  (1) 1M x  |  (1) 1M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  44MB  | (8) 411000 |  (1) 8M x  |  (1) 2M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  52MB  | (8) 411000 |  (1) 4M x  |  (1) 4M x  |  (1) 4M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  52MB  | (8) 411000 |  (1) 4M x  |  (1) 8M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  52MB  | (8) 411000 |  (1) 8M x  |  (1) 2M x  |  (1) 2M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  52MB  | (8) 411000 |  (1) 8M x  |  (1) 4M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  68MB  | (8) 411000 |  (1) 4M x  |  (1) 4M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  68MB  | (8) 411000 |  (1) 8M x  |  (1) 4M x  |  (1) 4M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  68MB  | (8) 411000 |  (1) 8M x  |  (1) 8M x  |    NONE    |
   |        |            |     36     |     36     |            |
   |--------+------------+------------+------------+------------|
   |  72MB  | (8) 411000 |  (1) 1M x  |  (1) 8M x  |  (1) 8M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  76MB  | (8) 411000 |  (1) 2M x  |  (1) 8M x  |  (1) 8M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   |  84MB  | (8) 411000 |  (1) 4M x  |  (1) 8M x  |  (1) 8M x  |
   |        |            |     36     |     36     |     36     |
   |--------+------------+------------+------------+------------|
   | 100MB  | (8) 411000 |  (1) 8M x  |  (1) 8M x  |  (1) 8M x  |
   |        |            |     36     |     36     |     36     |
   |------------------------------------------------------------|
   | Note: Bank 0 is factory installed 4MB and is not           |
   | configurable.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |           Speed            |              P1               |
   |----------------------------+-------------------------------|
   |           25MHz            |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |           33MHz            |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |           50iMHz           |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |           66iMHz           |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |           75iMHz           |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |          100iMHz           |       pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          CPU CLOCK SPEED CONFIGURATION (80486DX4)          |
   |------------------------------------------------------------|
   |           Speed            |              P4               |
   |----------------------------+-------------------------------|
   |            2.0x            |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |            2.5x            |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            3.0x            |       pins 3 & 4 closed       |
   +------------------------------------------------------------+