ZYTEX COMPUTERS, INC.
=====================

   TB486

   Processor             80486DX                                  
   Processor Speed       33MHz                                    
   Chip Set              ETEQ                                     
   Max. Onboard DRAM     32MB                                     
   Cache                 64/256KB                                 
   BIOS                  AMI/MR                                   
   Dimensions            330.2mm x 218.4mm                        
   I/O OPTIONS           32-bit external memory card slot         
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/U-Z/30090-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose                | Location | Purpose     | Location |
   |------------------------+----------+-------------+----------|
   | Reset switch           |    J4    | Power LED & |   JP26   |
   |                        |          | Keylock     |          |
   |------------------------+----------+-------------+----------|
   | External battery       |   JP2    | Speaker     |   JP27   |
   |------------------------+----------+-------------+----------|
   | 32-bit external memory |   JP5    | Turbo LED   |    T1    |
   | card                   |          |             |          |
   |------------------------+----------+-------------+----------|
   | Turbo switch           |   JP25   |             |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Jumper | Position |
   |----------------------------------------+--------+----------|
   |>> | Monitor type select monochrome     |   J4   |   Open   |
   |---+------------------------------------+--------+----------|
   |   | Monitor type select color          |   J4   |  Closed  |
   |---+------------------------------------+--------+----------|
   |>> | Filter circuitry disabled          |  JP3   |  Closed  |
   |---+------------------------------------+--------+----------|
   |   | Filter circuitry enabled           |  JP3   |   Open   |
   |---+------------------------------------+--------+----------|
   |>> | NPU read speed select 3 wait       |  JP24  |   Open   |
   |   | states                             |        |          |
   |---+------------------------------------+--------+----------|
   |   | NPU read speed select 2 wait       |  JP24  |  Closed  |
   |   | states                             |        |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |       64KB       |     (8) 8K x 8     |     (2) 8K x 8     |
   |------------------+--------------------+--------------------|
   |      256KB       |    (8) 32K x 8     |     (2) 8K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |    JP19     |   JP20    |  JP21  |  JP22  |  JP23  |
   |-------+-------------+-----------+--------+--------+--------|
   | 64KB  | pins 2 & 3  | pins 2 &  |  Open  |  Open  |  Open  |
   |       |   closed    | 3 closed  |        |        |        |
   |-------+-------------+-----------+--------+--------+--------|
   | 256KB | pins 1 & 2  | pins 1 &  | Closed | Closed | Closed |
   |       |   closed    | 2 closed  |        |        |        |
   +------------------------------------------------------------+