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       # 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    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        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       |
          +------------------------------------------------------------+