TANDY/RADIO SHACK
=================

   2500 SX/33

   Processor        80386SX                                       
   Processor Speed  33MHz                                         
   Chip Set         Unidentified                                  
   Video Chip Set   Unidentified                                  
   Maximum Onboard  10MB                                          
   Memory           
   Maximum Video    1MB                                           
   Memory           
   Cache            None                                          
   BIOS             Unidentified                                  
   Dimensions       391mm x 384mm                                 
   I/O Options      Floppy drive interface, IDE interface,        
                    parallel port, PS/2 mouse port, serial port,  
                    VGA port, riser slot, headphone connector,    
                    volume control                                
   NPU Options      80387SX                                       

<gopher://bitreich.org/I/th99/m/S-T/33766-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location | Purpose            | Location |
   |-----------------+----------+--------------------+----------|
   | VGA port        |   CN1    | Headphone          |   CN6    |
   |                 |          | connector          |          |
   |-----------------+----------+--------------------+----------|
   | PS/2 mouse port |   CN2    | IDE interface      |   CN7    |
   |-----------------+----------+--------------------+----------|
   | Parallel port   |   CN3    | Floppy drive       |   CN8    |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port     |   CN4    | Riser slot         |   SL1    |
   |-----------------+----------+--------------------+----------|
   | Volume control  |   CN5    |                    |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Label  |     Position      |
   |-------------------------------+--------+-------------------|
   |>> | On board video enabled    |   J1   | Pins 1 & 2 closed |
   |---+---------------------------+--------+-------------------|
   |   | On board video disabled   |   J1   | Pins 2 & 3 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |      Size       |      Bank 0       |        Bank 1        |
   |-----------------+-------------------+----------------------|
   |       2MB       |        2MB        |         None         |
   |-----------------+-------------------+----------------------|
   |       4MB       |        2MB        |      (2) 1M x 9      |
   |-----------------+-------------------+----------------------|
   |      10MB       |        2MB        |      (2) 4M x 9      |
   |------------------------------------------------------------|
   | Note: Bank 0 is factory installed and is not configurable. |
   | The location is unidentified.                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VIDEO MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Note: Board accepts 512KB/1MB of video memory. The    |
   |      size of the chips are unidentified. The number of     |
   |      banks is unidentified.                                |
   +------------------------------------------------------------+