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       # IBM CORPORATION
       
          PS/2 MODEL 25 TYPE 1
       
          Processor        8086                                          
          Processor Speed  8MHz                                          
          Chip Set         None                                          
          Max. Onboard     640KB                                         
          DRAM             
          Cache            None                                          
          BIOS             IBM                                           
          Dimensions       355mm x 304mm                                 
          I/O Options      Serial port, parallel port, pointing device   
                           connector, video port, IDE interface, floppy  
                           drive interface, earphone connector           
          NPU Options      8087                                          
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose         | Location | Purpose            | Location |
          |-----------------+----------+--------------------+----------|
          | Pointing device |    J1    | Fan                |    J8    |
          |-----------------+----------+--------------------+----------|
          | Keyboard        |    J2    | Keylock            |   J10    |
          |-----------------+----------+--------------------+----------|
          | Parallel port   |    J3    | IDE interface      |   J11    |
          |-----------------+----------+--------------------+----------|
          | Video port      |    J4    | Floppy drive       |   J12    |
          |                 |          | interface          |          |
          |-----------------+----------+--------------------+----------|
          | Serial port     |    J5    | Earphone connector |   J13    |
          |-----------------+----------+--------------------+----------|
          | Riser card      |    J6    |                    |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     | Parity (P-1)  |
          |------------+---------------+---------------+---------------|
          |   512KB    | (2) 256K x 9  |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |   640KB    | (2) 256K x 9  |   (4) 4464    |   (2) 4164    |
          +------------------------------------------------------------+