(TXT) View Source
       
       # ICL
       
          DRS M50/M55
       
          Processor    80386SX                                           
          Processor    16/20MHz                                          
          Speed        
          Chip Set     Unidentified                                      
          Max. Onboard 8MB                                               
          DRAM         
          Cache        None                                              
          BIOS         Unidentified                                      
          Dimensions   330mm x 218mm                                     
          I/O Options  Floppy drive interface, IDE interface, parallel   
                       port, serial ports (2), VGA port, riser slot      
          NPU Options  80387SX                                           
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose             | Location | Purpose        | Location |
          |---------------------+----------+----------------+----------|
          | Reset switch        |   CN1    | Serial port 1  |    P1    |
          |---------------------+----------+----------------+----------|
          | LED’s & security    |   CN2    | Parallel port  |    P2    |
          | lock                |          |                |          |
          |---------------------+----------+----------------+----------|
          | Keyboard/mouse      |   CN3    | Serial port 2  |    P3    |
          | connector           |          |                |          |
          |---------------------+----------+----------------+----------|
          | IDE interface       |   JP1    | VGA port (on   |    P4    |
          |                     |          | VGA board)     |          |
          |---------------------+----------+----------------+----------|
          | Floppy drive        |   JP2    | Riser slot     |   SL1    |
          | interface           |          |                |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           USER CONFIGURABLE SETTINGS (MAINBOARD)           |
          |------------------------------------------------------------|
          |           Function           | Jumper  |     Position      |
          |------------------------------+---------+-------------------|
          |   | Password enabled         |   J3    | Pins 1 & 2 closed |
          |---+--------------------------+---------+-------------------|
          |   | Password disabled        |   J3    | Pins 2 & 3 closed |
          |---+--------------------------+---------+-------------------|
          |   | Security lock enabled    |   J9    |       Open        |
          |---+--------------------------+---------+-------------------|
          |   | Security lock disabled   |   J9    |      Closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Size  |   Bank 0   |   Bank 1   |   Bank 2   |   Bank 3   |
          |--------+------------+------------+------------+------------|
          |  2MB   | (2) 1M x 9 |    None    |    None    |    None    |
          |--------+------------+------------+------------+------------|
          |  4MB   | (2) 1M x 9 | (2) 1M x 9 |    None    |    None    |
          |--------+------------+------------+------------+------------|
          |  8MB   | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |      Speed       |         J4         |         J5         |
          |------------------+--------------------+--------------------|
          |      16MHz       | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |      20MHz       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           USER CONFIGURABLE SETTINGS (VGA BOARD)           |
          |------------------------------------------------------------|
          |           Function           | Jumper  |     Position      |
          |------------------------------+---------+-------------------|
          | » | On board video enabled   |   J1    |      Closed       |
          |---+--------------------------+---------+-------------------|
          |   | On board video disabled  |   J1    |       Open        |
          |---+--------------------------+---------+-------------------|
          | » | VGA IRQ9 enabled         |   J4    |      Closed       |
          |---+--------------------------+---------+-------------------|
          |   | VGA IRQ9 disabled        |   J4    |       Open        |
          |---+--------------------------+---------+-------------------|
          | » | VGA BIOS enabled         |   SW1   | Pins 1 & 2 closed |
          |---+--------------------------+---------+-------------------|
          |   | VGA BIOS disabled        |   SW1   | Pins 2 & 3 closed |
          +------------------------------------------------------------+