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       # IPC CORPORATION, LTD.
       
          IPC DYNASTY HE/
       
          IPC VALUEMAGIC SERIES DESKTOP/
       
          IPC VALUEMAGIC SERIES MINITOWER (MB486HE#40)
       
          Processor      80486SX/80486DX/80486DX2/P23N/Pentium Overdrive 
          Processor      25/33/50(internal)/66(internal)MHz              
          Speed          
          Chip Set       UMC                                             
          Max. Onboard   32MB                                            
          DRAM           
          Cache          128/256KB                                       
          BIOS           Phoenix                                         
          Dimensions     254mm x 218mm                                   
          I/O Options    32-bit VESA local bus slots (2)                 
          NPU Options    None                                            
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |    J2    | Speaker           |    J8    |
          |------------------+----------+-------------------+----------|
          | Reset switch     |    J4    | Power LED         |   JP6    |
          |------------------+----------+-------------------+----------|
          | Turbo switch     |    J6    | 32-bit VESA local |  SL1 &   |
          |                  |          | bus slots         |   SL2    |
          |------------------+----------+-------------------+----------|
          | Keylock          |    J7    |                   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Battery type select internal     |   J1   |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery type select external     |   J1   |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Power good signal detect from    |  JP1   | pins 1 & 2 |
          |   | board                            |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Power good signal detect from    |  JP1   | pins 2 & 3 |
          |   | power supply                     |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | ELBA# enabled                    |  JP2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | LDEV1# enabled                   |  JP2   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP3   | pins 1 & 2 |
          |   | alter                            |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | ADS delay select no delay        |  JP7   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | ADS delay select 1-T delay       |  JP7   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | CPURDY delay select no delay     |  JP8   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CPURDY delay select 1-T delay    |  JP8   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | PQFP CPU disabled                |  JP17  |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | PQFP CPU enabled                 |  JP17  |    Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       4MB        |     (4) 1M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |      TAG      |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |   Size   |   JP9   |  JP10   |  JP11   |  JP12   |  JP13   |
          |----------+---------+---------+---------+---------+---------|
          |  128KB   |  2 & 3  |  2 & 3  |  Open   | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  256KB   |  1 & 2  |  1 & 2  | Closed  | Closed  | Closed  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |       Type        |       JP14        |        JP15        |
          |-------------------+-------------------+--------------------|
          |  80486SX (PQFP)   |       Open        | pins 3 & 4 closed  |
          |-------------------+-------------------+--------------------|
          |   80486SX (PGA)   |       Open        | pins 2 & 3 closed  |
          |-------------------+-------------------+--------------------|
          |  80486DX (PQFP)   |       Open        | pins 3 & 4 closed  |
          |-------------------+-------------------+--------------------|
          |   80486DX (PGA)   | pins 1 & 2 closed | pins 1 & 2, 3 & 4  |
          |                   |                   |       closed       |
          |-------------------+-------------------+--------------------|
          |     80486DX2      | pins 1 & 2 closed | pins 1 & 2, 3 & 4  |
          |                   |                   |       closed       |
          |-------------------+-------------------+--------------------|
          |       P23N        | pins 2 & 3 closed | pins 1 & 2, 3 & 4  |
          |                   |                   |       closed       |
          |-------------------+-------------------+--------------------|
          | Pentium Overdrive | pins 2 & 3 closed | pins 1 & 2, 3 & 4  |
          |                   |                   |       closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |           Speed            |             JP18              |
          |----------------------------+-------------------------------|
          |           25MHz            |       pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           33MHz            |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |           50iMHz           |       pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           66iMHz           |       pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BUS SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |           CPU speed           |            JP16            |
          |-------------------------------+----------------------------|
          |           <= 33MHz            |            Open            |
          |-------------------------------+----------------------------|
          |            > 33MHz            |           Closed           |
          +------------------------------------------------------------+