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

   SENSATION! (250-1650)

   Processor        80486SX/80487SX/ODP486                        
   Processor Speed  25MHz                                         
   Chip Set         Unidentified                                  
   Video Chip Set   Unidentified                                  
   Maximum Onboard  32MB                                          
   Memory           
   Maximum Video    1MB                                           
   Memory           
   Cache            None                                          
   BIOS             Unidentified                                  
   Dimensions       394mm x 381mm                                 
   I/O Options      CD-ROM interface, floppy drive interface, IDE 
                    interface, parallel port, PS/2 mouse port,    
                    serial port, VGA feature connector, VGA port, 
                    riser slot, audio connector, fax/data modem   
                    connector, CD-ROM adapter, modem port         
                    MIDI/game port, microphone connector,         
                    headphone connector, line out connector       
   NPU Options      80487SX                                       

<gopher://bitreich.org/I/th99/m/S-T/33767-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose      |   Location   | Purpose       |   Location   |
   |--------------+--------------+---------------+--------------|
   | VGA feature  |     CN1      | Serial port   | Unidentified |
   | connector    |              |               |              |
   |--------------+--------------+---------------+--------------|
   | Floppy drive |     CN2      | Parallel port | Unidentified |
   | interface    |              |               |              |
   |--------------+--------------+---------------+--------------|
   | CD audio     |     CN3      | MIDI/game     | Unidentified |
   | connector    |              | port          |              |
   |--------------+--------------+---------------+--------------|
   | Fax/data     |     CN4      | Microphone    | Unidentified |
   | modem        |              | connector     |              |
   | connector    |              |               |              |
   |--------------+--------------+---------------+--------------|
   | CD-ROM       |     CN5      | Headphone     | Unidentified |
   | interface    |              | connector     |              |
   |--------------+--------------+---------------+--------------|
   | CD-ROM       |     CN6      | Line out      | Unidentified |
   | adapter      |              | connector     |              |
   |--------------+--------------+---------------+--------------|
   | IDE          |     CN7      | VGA port      | Unidentified |
   | interface    |              |               |              |
   |--------------+--------------+---------------+--------------|
   | PS/2 mouse   | Unidentified | Riser slot    |     SL1      |
   | port         |              |               |              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Label |   Position   |
   |-------------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J9   | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Synthesizer IRQ15 enabled       |  J11  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | Synthesizer IRQ15 disabled      |  J11  |     Open     |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J12  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Monitor type select color       |  J16  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | Monitor type select monochrome  |  J16  |     Open     |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J17  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Waveform IRQ5 enabled           |  J21  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | Waveform IRQ5 disabled          |  J21  |     Open     |
   |---+---------------------------------+-------+--------------|
   |>> | Monitor frequency select        | SW1/5 |     Off      |
   |   | 31.5KHz                         |       |              |
   |---+---------------------------------+-------+--------------|
   |   | Monitor frequency select 40KHz  | SW1/5 |      On      |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     | SW1/6 |      On      |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | VGA IRQ9 disabled               | SW1/7 |     Off      |
   |---+---------------------------------+-------+--------------|
   |   | VGA IRQ9 enabled                | SW1/7 |      On      |
   |---+---------------------------------+-------+--------------|
   |>> | On board video enabled          | SW1/8 |      On      |
   |---+---------------------------------+-------+--------------|
   |   | On board video disabled         | SW1/8 |     Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 4MB  |    None     |    None     |    None    |  (1) 1M x  |
   |      |             |             |            |     36     |
   |------+-------------+-------------+------------+------------|
   | 6MB  | (1) 512K x  | (1) 512K x  | (1) 256K x | (1) 256K x |
   |      |     36      |     36      |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (1) 512K x  | (1) 512K x  | (1) 512K x | (1) 512K x |
   |      |     36      |     36      |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 8MB  |    None     |    None     |  (1) 1M x  |  (1) 1M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 8MB  |    None     |    None     |    None    |  (1) 2M x  |
   |      |             |             |            |     36     |
   |------+-------------+-------------+------------+------------|
   | 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 512K x | (1) 512K x |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 12MB |    None     | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 16MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 16MB |    None     |    None     |  (1) 2M x  |  (1) 2M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 18MB | (1) 2M x 36 | (1) 2M x 36 | (1) 256K x | (1) 256K x |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 20MB | (1) 2M x 36 | (1) 2M x 36 | (1) 512K x | (1) 512K x |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 24MB | (1) 2M x 36 | (1) 2M x 36 |  (1) 1M x  |  (1) 1M x  |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 32MB | (1) 2M x 36 | (1) 2M x 36 |  (1) 2M x  |  (1) 2M x  |
   |      |             |             |     36     |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VIDEO MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Note: Board accepts 512KB/1MB of video memory. 512KB  |
   |      is factory installed and is not configurable. The     |
   |      size of the chips are unidentified. The number of     |
   |      banks is unidentified.                                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           VIDEO RESOLUTION SELECTION (800 X 600)           |
   |------------------------------------------------------------|
   |        Frequency        |      SW1/1      |     SW1/2      |
   |-------------------------+-----------------+----------------|
   |>>      |      56Hz      |       Off       |      Off       |
   |--------+----------------+-----------------+----------------|
   |        |      60Hz      |       Off       |       On       |
   |--------+----------------+-----------------+----------------|
   |        |      72Hz      |       On        |      Off       |
   |--------+----------------+-----------------+----------------|
   |        |      56Hz      |       On        |       On       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          VIDEO RESOLUTION SELECTION (1024 X 768)           |
   |------------------------------------------------------------|
   |        Frequency        |      SW1/3      |     SW1/4      |
   |-------------------------+-----------------+----------------|
   |>> |   56Hz interlaced   |       Off       |      Off       |
   |---+---------------------+-----------------+----------------|
   |   | 60Hz non-interlaced |       Off       |       On       |
   +------------------------------------------------------------+