HEWLETT-PACKARD COMPANY
=======================

   HP VECTRA 500 MODEL 520 (TYPE A),

   MODEL 525 (TYPE A)

   Device Type      Mainboard                                     
   Processor        Pentium                                       
   Processor Speed  100/120/133/150/166MHz                        
   Chip Set         Unidentified                                  
   Video Chip Set   Unidentified                                  
   Maximum Onboard  192MB (EDO supported) Unified Memory          
   Memory           Architecture (UMA)                            
   Cache            256KB                                         
   BIOS             Unidentified                                  
   Dimensions       275mm x 205mm                                 
   I/O Options      Floppy drive interface, IDE interfaces (2),   
                    parallel port, PS/2 mouse port, serial ports  
                    (2), cache slot                               
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/E-H/35387-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | 3.3v power        |    C1    | PS/2 mouse port  |   CN5    |
   |-------------------+----------+------------------+----------|
   | Status panel      |    C2    | IDE interface 1  |   CN6    |
   | connector         |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Start connector   |    C3    | IDE interface 2  |   CN7    |
   |-------------------+----------+------------------+----------|
   | 5v power          |    C4    | Floppy drive     |   CN8    |
   |                   |          | interface        |          |
   |-------------------+----------+------------------+----------|
   | VGA port          |   CN1    | VGA feature      |   CN9    |
   |                   |          | connector        |          |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |   CN2    | External battery |    J1    |
   |-------------------+----------+------------------+----------|
   | Serial port 1     |   CN3    | Cache slot       |   SL1    |
   |-------------------+----------+------------------+----------|
   | Parallel port     |   CN4    |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               |  Label  |  Position  |
   |-------------------------------------+---------+------------|
   |>> | Keyboard power down enabled     |   JP4   |   Closed   |
   |---+---------------------------------+---------+------------|
   |   | Keyboard power down disabled    |   JP4   |    Open    |
   |---+---------------------------------+---------+------------|
   |>> | Flash BIOS enabled              |  SW1/1  |    Off     |
   |---+---------------------------------+---------+------------|
   |   | Flash BIOS disabled             |  SW1/1  |     On     |
   |---+---------------------------------+---------+------------|
   |>> | CMOS memory normal operation    |  SW1/2  |    Off     |
   |---+---------------------------------+---------+------------|
   |   | CMOS memory clear               |  SW1/2  |     On     |
   |---+---------------------------------+---------+------------|
   |>> | Password normal operation       |  SW1/3  |    Off     |
   |---+---------------------------------+---------+------------|
   |   | Password clear                  |  SW1/3  |     On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SIMM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    16MB    |  (2) 2M x 36  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 2M x 36  |  (2) 2M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 4M x 36  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |    48MB    |  (2) 2M x 36  |  (2) 2M x 36  |  (2) 2M x 36  |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (2) 4M x 36  |  (2) 4M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (2) 8M x 36  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |    96MB    |  (2) 4M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |   128MB    |  (2) 8M x 36  |  (2) 8M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |   128MB    | (2) 16M x 36  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |   144MB    | (2) 16M x 36  |  (2) 2M x 36  |     None      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SIMM CONFIGURATION (CON'T)                 |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |   160MB    | (2) 16M x 36  |  (2) 2M x 36  |  (2) 2M x 36  |
   |------------+---------------+---------------+---------------|
   |   160MB    | (2) 16M x 36  |  (2) 4M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |   192MB    | (2) 16M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |   192MB    | (2) 16M x 36  |  (2) 8M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |   192MB    |  (2) 8M x 36  |  (2) 8M x 36  |  (2) 8M x 36  |
   |------------------------------------------------------------|
   |      Note: Board accepts EDO memory.                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |              SL1              |
   |----------------------------+-------------------------------|
   |           256KB            |    256KB module installed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |            Type             |              J6              |
   |-----------------------------+------------------------------|
   |>> |       Synchronous       |      Pins 2 & 3 closed       |
   |---+-------------------------+------------------------------|
   |   |      Asynchronous       |      Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   | CPU speed  |  Clock   | Multiplier |  J7   | SW2/1 | SW2/2 |
   |            |  speed   |            |       |       |       |
   |------------+----------+------------+-------+-------+-------|
   |   100MHz   |  66MHz   |    1.5x    | 3 & 4 |  Off  |  Off  |
   |------------+----------+------------+-------+-------+-------|
   |   120MHz   |  60MHz   |     2x     | 1 & 3 |  On   |  Off  |
   |------------+----------+------------+-------+-------+-------|
   |   133MHz   |  66MHz   |     2x     | 3 & 4 |  On   |  Off  |
   |------------+----------+------------+-------+-------+-------|
   |   150MHz   |  60MHz   |    2.5x    | 1 & 3 |  On   |  On   |
   |------------+----------+------------+-------+-------+-------|
   |   166MHz   |  66MHz   |    2.5x    | 3 & 4 |  On   |  On   |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+