OLIVETTI
========

   M4-4X/M4-6X/PCS4XX (BA204X)

   Processor        80486SX/80487SX/80486DX/80486DX2              
   Processor Speed  25/33/50(internal)/66(internal)MHz            
   Chip Set         Unidentified                                  
   Maximum Onboard  36MB                                          
   Memory           
   Cache            None                                          
   BIOS             Unidentified                                  
   Dimensions       254mm x 218mm                                 
   I/O Options      Floppy drive interfaces (2), IDE interface,   
                    parallel port, PS/2 mouse port, serial ports  
                    (2), VGA port, riser slot, CD-ROM connector   
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/M-O/33282-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function     | Label  |        Function        | Label |
   |------------------+--------+------------------------+-------|
   | PS/2 mouse port  |  CN1   | CD -ROM connector      |  CN6  |
   |------------------+--------+------------------------+-------|
   | Parallel port    |  CN2   | IDE interface          |  CN7  |
   |------------------+--------+------------------------+-------|
   | Serial port 2    |  CN3   | Floppy drive interface |  CN8  |
   |------------------+--------+------------------------+-------|
   | Serial port 1    |  CN4   | Floppy drive interface |  CN9  |
   |------------------+--------+------------------------+-------|
   | VGA port         |  CN5   | Riser slot             |  SL1  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  F1   |    N/A     |
   |---+-----------------------------------+-------+------------|
   |   | Hard drives installed 1           |  J2   |   Closed   |
   |---+-----------------------------------+-------+------------|
   |   | Hard drives installed 2           |  J2   |    Open    |
   |---+-----------------------------------+-------+------------|
   |>> | Setup access disabled             |  J12  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Setup access enabled              |  J12  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Mouse IRQ12 enabled               |  J13  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Mouse IRQ12 disabled              |  J13  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Serial port 1 bootstrap enabled   |  J21  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Serial port 1 bootstrap disabled  |  J21  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Serial port 2 bootstrap enabled   |  J25  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Serial port 2 bootstrap disabled  |  J25  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Floppy drives not write protected |  J33  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Floppy drives write protected     |  J33  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J45  |    N/A     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                            DRAM                            |
   |------------------------------------------------------------|
   |      Size       |      Bank 0       |        Bank 1        |
   |-----------------+-------------------+----------------------|
   |       4MB       |        4MB        |         None         |
   |-----------------+-------------------+----------------------|
   |       8MB       |        4MB        |     (1) 1M x 36      |
   |-----------------+-------------------+----------------------|
   |      12MB       |        4MB        |     (1) 2M x 36      |
   |-----------------+-------------------+----------------------|
   |      20MB       |        4MB        |     (1) 4M x 36      |
   |-----------------+-------------------+----------------------|
   |      36MB       |        4MB        |     (1) 8M x 36      |
   |------------------------------------------------------------|
   | Note: Bank 0 is factory configured and is not              |
   | configurable.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          CPU TYPE                          |
   |------------------------------------------------------------|
   |      Setting       |        J28        |        J29        |
   |--------------------+-------------------+-------------------|
   |   80486SX (PQFP)   | Pins 1 & 2 closed | Pins 1 & 2 closed |
   |--------------------+-------------------+-------------------|
   |      80486SX       | Pins 1 & 2 closed | Pins 1 & 2 closed |
   |   (PQFP)/80487SX   |                   |                   |
   |--------------------+-------------------+-------------------|
   |      80486SX       | Pins 1 & 2 closed | Pins 1 & 2 closed |
   |  (PQFP)/80486DX2   |                   |                   |
   |--------------------+-------------------+-------------------|
   |   80486SX (PGA)    | Pins 2 & 3 closed | Pins 1 & 2 closed |
   |--------------------+-------------------+-------------------|
   |      80487SX       | Pins 1 & 2 closed | Pins 1 & 2 closed |
   |--------------------+-------------------+-------------------|
   |      80486DX       | Pins 1 & 2 closed | Pins 2 & 3 closed |
   |--------------------+-------------------+-------------------|
   |      80486DX2      | Pins 1 & 2 closed | Pins 2 & 3 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         CPU SPEED                          |
   |------------------------------------------------------------|
   |           Setting            |             J44             |
   |------------------------------+-----------------------------|
   |            25MHz             |           Closed            |
   |------------------------------+-----------------------------|
   |            33MHz             |            Open             |
   |------------------------------+-----------------------------|
   |            50iMHz            |           Closed            |
   |------------------------------+-----------------------------|
   |            66iMHz            |            Open             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        VIDEO MEMORY                        |
   |------------------------------------------------------------|
   |       Size        |       Bank 0       |      Bank 1       |
   |-------------------+--------------------+-------------------|
   |       512KB       |       512KB        |       None        |
   |-------------------+--------------------+-------------------|
   |        1MB        |       512KB        |       512KB       |
   |------------------------------------------------------------|
   | Note: Bank 0 is factory installed and is not configurable. |
   | The chip sizes are unidentified.                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MISCELLANEOUS TECHNICAL NOTE                |
   |------------------------------------------------------------|
   | The location of pin 1 is unidentified.                     |
   +------------------------------------------------------------+