DELL COMPUTER CORPORATION
=========================

   OMNIPLEX 4XX/ME

Processor  80486SX/80486DX/80486DX2/80486DX4                             
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz 
Speed      
Chip Set   Intel                                                         
Video Chip ATI                                                           
Set        
Maximum    128MB                                                         
Onboard    
Memory     
Maximum    1MB                                                           
Video      
Memory     
Cache      256KB                                                         
BIOS       Unidentified                                                  
Dimensions 330mm x 218mm                                                 
I/O        Floppy drive interface, IDE interface, parallel port, PS/2    
Options    mouse port, serial ports (2), feature connector, VGA port,    
           riser slot, cache slot                                        
NPU        None                                                          
Options    

<gopher://bitreich.org/I/th99/m/C-D/33650-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Feature connector |   CN1    | Thermal monitor  |   CN9    |
   |                   |          | board connector  |          |
   |-------------------+----------+------------------+----------|
   | PS/2 mouse port   |   CN2    | IDE interface    |    J1    |
   |                   |          | LED              |          |
   |-------------------+----------+------------------+----------|
   | Serial port 1     |   CN3    | Chassis fan      |    J2    |
   |                   |          | power            |          |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |   CN4    | Speaker          |    J3    |
   |-------------------+----------+------------------+----------|
   | Parallel port     |   CN5    | External battery |    J4    |
   |-------------------+----------+------------------+----------|
   | VGA port          |   CN6    | Audio connector  |    J5    |
   |-------------------+----------+------------------+----------|
   | IDE interface     |   CN7    | Riser slot       |   SL1    |
   |-------------------+----------+------------------+----------|
   | Floppy drive      |   CN8    | Cache slot       |   SL2    |
   | interface         |          |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Label |   Position   |
   |-------------------------------------+-------+--------------|
   |>> | Factory configured - do not     | BOOT  |     Open     |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  CRD  |     Open     |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | EISA configuration normal       | EISA  |     Open     |
   |   | operation                       |       |              |
   |---+---------------------------------+-------+--------------|
   |   | EISA configuration clear        | EISA  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JC1  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JC2  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JC3  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JC4  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JC5  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JP2  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JP4  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  JP5  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Integrated SCSI host adapter    | SCSI  |    Closed    |
   |   | terminated                      |       |              |
   |---+---------------------------------+-------+--------------|
   |   | Integrated SCSI host adapter    | SCSI  |     Open     |
   |   | not terminated                  |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | On board video enabled          | SW1/1 |      On      |
   |---+---------------------------------+-------+--------------|
   |   | On board video disabled         | SW1/1 |     Off      |
   |---+---------------------------------+-------+--------------|
   |>> | Password enabled                | SW1/2 |      On      |
   |---+---------------------------------+-------+--------------|
   |   | Password disabled               | SW1/2 |     Off      |
   |---+---------------------------------+-------+--------------|
   |>> | I/O controller address select   | SW1/3 |      On      |
   |   | 26Eh - 26Fh                     |       |              |
   |---+---------------------------------+-------+--------------|
   |   | I/O controller address select   | SW1/3 |     Off      |
   |   | 398h - 399h                     |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Flash BIOS update at boot       | SW1/4 |      On      |
   |---+---------------------------------+-------+--------------|
   |   | flash BIOS not updated at boot  | SW1/4 |     Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       4MB        |   (2) 512K x 36    |        None        |
   |------------------+--------------------+--------------------|
   |       8MB        |    (2) 1M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       8MB        |   (2) 512K x 36    |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       12MB       |    (2) 1M x 36     |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 2M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 1M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       20MB       |    (2) 2M x 36     |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       24MB       |    (2) 2M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 4M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 2M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       36MB       |    (2) 4M x 36     |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       40MB       |    (2) 4M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       48MB       |    (2) 4M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (2) 8M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       64MB       |    (2) 4M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       68MB       |    (2) 8M x 36     |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       72MB       |    (2) 8M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (2) 8M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       96MB       |    (2) 8M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (2) 8M x 36     |    (2) 8M x 36     |
   |------------------------------------------------------------|
   | Note: Board also accepts x 32 SIMMs.                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |              SL1              |
   |----------------------------+-------------------------------|
   |           256KB            |    256KB module installed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VIDEO MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Size       |      Bank 0      |        Bank 1         |
   |-----------------+------------------+-----------------------|
   |      512KB      |      512KB       |         None          |
   |-----------------+------------------+-----------------------|
   |       1MB       |      512KB       |     (4) 256K x 4      |
   |------------------------------------------------------------|
   | Note: Bank 0 is factory installed and is not configurable. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |       Speed        |        JP1        |        JP3        |
   |--------------------+-------------------+-------------------|
   |       25MHz        |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |       33MHz        |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |       50iMHz       |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |       66iMHz       |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |       75iMHz       |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |      100iMHz       |       Open        |      Closed       |
   +------------------------------------------------------------+