IBM CORPORATION
===============

   PC 330/350 SERIES (TYPE 65X6)

   Processor        Pentium                                       
   Processor Speed  75/90/100MHz                                  
   Chip Set         Unidentified                                  
   Video Chip Set   Unidentified                                  
   Maximum Onboard  128MB                                         
   Memory           
   Maximum Video    2MB                                           
   Memory           
   Cache            256/512KB                                     
   BIOS             Unidentified                                  
   Dimensions       254mm x 218mm                                 
   I/O Options      Floppy drive interface, IDE interfaces (2),   
                    parallel port, PS/2 mouse port, serial ports  
                    (2), VESA feature connector, VGA port, riser  
                    slot                                          
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/I-L/33790-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | VGA port            |   CN1    | IDE interface  |   CN8    |
   |---------------------+----------+----------------+----------|
   | Parallel port       |   CN2    | Floppy drive   |   CN9    |
   |                     |          | interface      |          |
   |---------------------+----------+----------------+----------|
   | Serial port         |   CN3    | Voltage        |    J1    |
   |                     |          | regulator      |          |
   |---------------------+----------+----------------+----------|
   | Serial port         |   CN4    | Front panel    |   J1D1   |
   |                     |          | connector      |          |
   |---------------------+----------+----------------+----------|
   | PS/2 mouse port     |   CN5    | Front panel    |   J2A2   |
   |                     |          | connector      |          |
   |---------------------+----------+----------------+----------|
   | VESA feature        |   CN6    | Riser slot     |   SL1    |
   | connector           |          |                |          |
   |---------------------+----------+----------------+----------|
   | IDE interface       |   CN7    |                |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Flash BIOS normal operation       | J5J1  | Pins 1 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Flash BIOS clear                  | J5J1  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Password normal operation         | SW1/3 |    Off     |
   |---+-----------------------------------+-------+------------|
   |   | Password clear                    | SW1/3 |     On     |
   |---+-----------------------------------+-------+------------|
   |>> | CMOS memory normal operation      | SW1/4 |    Off     |
   |---+-----------------------------------+-------+------------|
   |   | CMOS memory clear                 | SW1/4 |     On     |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter | SW1/5 |    Off     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |      Size      |       Bank 0        |       Bank 1        |
   |----------------+---------------------+---------------------|
   |      8MB       |     (2) 1M x 36     |        None         |
   |----------------+---------------------+---------------------|
   |      16MB      |     (2) 2M x 36     |        None         |
   |----------------+---------------------+---------------------|
   |      16MB      |     (2) 1M x 36     |     (2) 1M x 36     |
   |----------------+---------------------+---------------------|
   |      24MB      |     (2) 2M x 36     |     (2) 1M x 36     |
   |----------------+---------------------+---------------------|
   |      32MB      |     (2) 4M x 36     |        None         |
   |----------------+---------------------+---------------------|
   |      32MB      |     (2) 2M x 36     |     (2) 2M x 36     |
   |----------------+---------------------+---------------------|
   |      40MB      |     (2) 4M x 36     |     (2) 1M x 36     |
   |----------------+---------------------+---------------------|
   |      48MB      |     (2) 4M x 36     |     (2) 2M x 36     |
   |----------------+---------------------+---------------------|
   |      64MB      |     (2) 8M x 36     |        None         |
   |----------------+---------------------+---------------------|
   |      64MB      |     (2) 4M x 36     |     (2) 4M x 36     |
   |----------------+---------------------+---------------------|
   |      72MB      |     (2) 8M x 36     |     (2) 1M x 36     |
   |----------------+---------------------+---------------------|
   |      80MB      |     (2) 8M x 36     |     (2) 2M x 36     |
   |----------------+---------------------+---------------------|
   |     128MB      |     (2) 8M x 36     |     (2) 8M x 36     |
   |------------------------------------------------------------|
   | Note: Board also accepts x 32 SIMMs. The location of banks |
   | 0 & 1 are unidentified.                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
   |------------+---------------+---------------+---------------|
   |   512KB    |  (4) 64K x 8  |  (4) 64K x 8  |  (1) 32K x 8  |
   |------------------------------------------------------------|
   | Note: The location of banks 0 & 1 are unidentified.        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE SWITCH CONFIGURATION                 |
   |------------------------------------------------------------|
   |        Size        |       SW1/1        |      SW1/2       |
   |--------------------+--------------------+------------------|
   |        None        |         On         |       N/A        |
   |--------------------+--------------------+------------------|
   |       256KB        |        Off         |       Off        |
   |--------------------+--------------------+------------------|
   |       512KB        |        Off         |        On        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VIDEO MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   |       Size       |       Bank 0        |      Bank 1       |
   |------------------+---------------------+-------------------|
   |       1MB        |         1MB         |       None        |
   |------------------+---------------------+-------------------|
   |       2MB        |         1MB         |        1MB        |
   |------------------------------------------------------------|
   |      Note: Bank 0 is factory installed and is not          |
   |      configurable. The size of the video memory chips are  |
   |      unidentified.                                         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   | CPU speed |   Clock   | Multiplier | SW1/6 | SW1/7 | SW1/8 |
   |           |   speed   |            |       |       |       |
   |-----------+-----------+------------+-------+-------+-------|
   |   75MHz   |   50MHz   |    1.5x    |  Off  |  Off  |  Off  |
   |-----------+-----------+------------+-------+-------+-------|
   |   90MHz   |   60MHz   |    1.5x    |  Off  |  On   |  Off  |
   |-----------+-----------+------------+-------+-------+-------|
   |  100MHz   |   66MHz   |    1.5x    |  Off  |  Off  |  On   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |            Type            |             J9C1              |
   |----------------------------+-------------------------------|
   |>> |           VR           |       Pins 1 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |          VRE           |       Pins 5 & 7 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               ISA BUS CLOCK SPEED SELECTION                |
   |------------------------------------------------------------|
   |       CPU speed       | ISA clock speed |       J5J1       |
   |-----------------------+-----------------+------------------|
   |>> | 75MHz (1/6 clock  |     8.33MHz     | Pins 5 & 7 open  |
   |   |      speed)       |                 |                  |
   |---+-------------------+-----------------+------------------|
   |   | 75MHz (1/8 clock  |     6.25MHz     |    Pins 5 & 7    |
   |   |      speed)       |                 |      closed      |
   |---+-------------------+-----------------+------------------|
   |   | 90MHz (1/6 clock  |      10MHz      | Pins 5 & 7 open  |
   |   |      speed)       |                 |                  |
   |---+-------------------+-----------------+------------------|
   |>> | 90MHz (1/8 clock  |     7.5MHz      |    Pins 5 & 7    |
   |   |      speed)       |                 |      closed      |
   |---+-------------------+-----------------+------------------|
   |   | 100MHz (1/6 clock |      11MHz      | Pins 5 & 7 open  |
   |   |      speed)       |                 |                  |
   |---+-------------------+-----------------+------------------|
   |   | 100MHz (1/8 clock |     8.25MHz     |    Pins 5 & 7    |
   |   |      speed)       |                 |      closed      |
   +------------------------------------------------------------+