(TXT) View Source
       
       # DIGITAL EQUIPMENT CORPORATION
       
          DECPC 400MT
       
          Processor        80486DX/80486DX2                              
          Processor Speed  33/50(internal)/66(internal)MHz               
          Chip Set         Unidentified                                  
          Video Chip Set   Unidentified                                  
          Maximum Onboard  64MB                                          
          Memory           
          Maximum Video    1MB                                           
          Memory           
          Cache            None                                          
          BIOS             Unidentified                                  
          Dimensions       254mm x 218mm                                 
          I/O Options      CPU slot, parallel port, PS/2 mouse port,     
                           serial ports (2), VGA port                    
          NPU Options      None                                          
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose         | Location | Purpose            | Location |
          |-----------------+----------+--------------------+----------|
          | Parallel port   |   CN1    | PS/2 mouse port    |   CN5    |
          |-----------------+----------+--------------------+----------|
          | VGA port        |   CN2    | External battery   |   JP1    |
          |-----------------+----------+--------------------+----------|
          | Serial port 2   |   CN3    | CPU slot           |   SL1    |
          |-----------------+----------+--------------------+----------|
          | Serial port 1   |   CN4    |                    |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function               | Label |   Position   |
          |-------------------------------------+-------+--------------|
          | » | VGA IRQ9 disabled               |  J13  |     Open     |
          |---+---------------------------------+-------+--------------|
          |   | VGA IRQ9 enabled                |  J13  |    Closed    |
          |---+---------------------------------+-------+--------------|
          | » | On board video enabled          |  J14  |    Closed    |
          |---+---------------------------------+-------+--------------|
          |   | On board video disabled         |  J14  |     Open     |
          |---+---------------------------------+-------+--------------|
          | » | Local enabled                   |  J23  |  Pins 1 & 2  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | Local & ISA enabled             |  J23  |  Pins 2 & 3  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          | » | Parallel port unidirectional    |  J25  |  Pins 1 & 2  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | Parallel port bidirectional     |  J25  |  Pins 2 & 3  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          | » | Reset switch enabled            |  J27  |  Pins 1 & 2  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | Reset switch disabled           |  J27  |  Pins 2 & 3  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          | » | Factory configured - do not     |  J28  | Unidentified |
          |   | alter                           |       |              |
          |---+---------------------------------+-------+--------------|
          |   | Monitor type select color       |  J29  |    Closed    |
          |---+---------------------------------+-------+--------------|
          |   | Monitor type select monochrome  |  J29  |     Open     |
          |---+---------------------------------+-------+--------------|
          | » | CMOS memory normal operation    |  J31  |  Pins 1 & 2  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | CMOS memory clear               |  J31  |  Pins 2 & 3  |
          |   |                                 |       |    closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
          |------+-------------+-------------+------------+------------|
          | 4MB  | (1) 1M x 36 |    None     |    None    |    None    |
          |------+-------------+-------------+------------+------------|
          | 8MB  | (1) 1M x 36 | (1) 1M x 36 |    None    |    None    |
          |------+-------------+-------------+------------+------------|
          | 12MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |    None    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 16MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 16MB | (1) 4M x 36 |    None     |    None    |    None    |
          |------+-------------+-------------+------------+------------|
          | 20MB | (1) 1M x 36 | (1) 4M x 36 |    None    |    None    |
          |------+-------------+-------------+------------+------------|
          | 24MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 4M x  |    None    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 32MB | (1) 4M x 36 | (1) 4M x 36 |    None    |    None    |
          |------+-------------+-------------+------------+------------|
          | 40MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 4M x  |  (1) 4M x  |
          |      |             |             |     36     |     36     |
          |------+-------------+-------------+------------+------------|
          | 48MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |    None    |
          |      |             |             |     36     |            |
          |------+-------------+-------------+------------+------------|
          | 64MB | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |  (1) 4M x  |
          |      |             |             |     36     |     36     |
          |------------------------------------------------------------|
          | Note: The location of banks 0, 1, 2 & 3 are unidentified.  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VIDEO MEMORY CONFIGURATION                 |
          |------------------------------------------------------------|
          |        Size        |      Bank 0       |      Bank 1       |
          |--------------------+-------------------+-------------------|
          |       512KB        |       512KB       |       None        |
          |--------------------+-------------------+-------------------|
          |        1MB         |       512KB       |       512KB       |
          |------------------------------------------------------------|
          | Note: The location of banks 0 & 1 are unidentified.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             VIDEO MEMORY JUMPER CONFIGURATION              |
          |------------------------------------------------------------|
          |            Size            |              J22              |
          |----------------------------+-------------------------------|
          |           512KB            |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |            1MB             |       Pins 2 & 3 closed       |
          +------------------------------------------------------------+