TARGET MICRO
============

   TYPHOON 486 VESA

   Processor         80486SX/80487SX/80486DX/80486DX2             
   Processor Speed   20/25/33/50 (Internal)/50/66 (Internal)      
   Chip Set          Unichip                                      
   Max. onboard DRAM 128MB                                        
   Cache             32/64/128/256KB                              
   BIOS              AMI                                          
   Dimensions        260mm x 220mm                                
   I/O Options       32-bit VESA local bus slots (3)              
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/S-T/31652-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |    J4    | Turbo switch      |   JP17   |
   |------------------+----------+-------------------+----------|
   | Power LED &      |    J5    | Reset switch      |   JP18   |
   | keylock          |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Speaker          |    J6    | 32-bit VESA local | S1, S2,  |
   |                  |          | bus slots         |   & S3   |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |   JP16   |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | Monitor type select color      |  JP1   |     Open     |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |  JP1   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  JP2   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  JP2   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 16M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       80MB       |    (4) 16M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (4) 16M x 9     |    (4) 16M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size     |    Bank 0     |    Bank 1     |     TAG      |
   |-------------+---------------+---------------+--------------|
   |    32KB     |  (4) 8K x 8   |     NONE      |    8K x 8    |
   |-------------+---------------+---------------+--------------|
   |    64KB     |  (4) 8K x 8   |  (4) 8K x 8   |    8K x 8    |
   |-------------+---------------+---------------+--------------|
   |    128KB    |  (4) 32K x 8  |     NONE      |    8K x 8    |
   |-------------+---------------+---------------+--------------|
   |    256KB    |  (4) 32K x 8  |  (4) 32K x 8  |   32K x 8    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size   |   JP6    |   JP7   |   JP9   |       JP11        |
   |---------+----------+---------+---------+-------------------|
   |  32KB   |   Open   |  Open   |  Open   |    pins 2 & 3     |
   |---------+----------+---------+---------+-------------------|
   |  64KB   |   Open   | Closed  |  Open   |    pins 1 & 2     |
   |---------+----------+---------+---------+-------------------|
   |  128KB  |   Open   | Closed  | Closed  | pins 1 & 2, 3 & 4 |
   |---------+----------+---------+---------+-------------------|
   |  256KB  |  Closed  | Closed  | Closed  | pins 1 & 2, 4 & 5 |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   VESA LOCAL BUS SELECT                    |
   |------------------------------------------------------------|
   |     Mode      |     JP40     |     JP41     |     JP42     |
   |---------------+--------------+--------------+--------------|
   | VL-Bus Master |     Open     |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   | VL-Bus Slave  |    Closed    |    Closed    |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  VESA CLOCK CONFIGURATION                  |
   |------------------------------------------------------------|
   |             Mode              |            JP43            |
   |-------------------------------+----------------------------|
   |     Adjusted VL-BUS clock     |     pins 1 & 2 closed      |
   |-------------------------------+----------------------------|
   |      Normal VL-BUS clock      |     pins 2 & 3 closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             VESA BUS SPEED (ID3) CONFIGURATION             |
   |------------------------------------------------------------|
   |     CPU speed     |    JP19 (ID3)     |        JP44        |
   |-------------------+-------------------+--------------------|
   |      GBP 33MHz      |       Open        | pins 2 & 3 closed  |
   |-------------------+-------------------+--------------------|
   |      > 33MHz      |      Closed       | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   VESA ID4 CONFIGURATION                   |
   |------------------------------------------------------------|
   |            Setting            |         JP20 (ID4)         |
   |-------------------------------+----------------------------|
   |    Reserved for future use    |           Closed           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |     Speed     |     JP29     |     JP30     |     JP31     |
   |---------------+--------------+--------------+--------------|
   |     20MHz     |     Open     |    Closed    |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     25MHz     |    Closed    |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     33MHz     |    Closed    |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   |    50i MHz    |    Closed    |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     50MHz     |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   |    66i MHz    |    Closed    |    Closed    |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |           Type           |               JP4               |
   |--------------------------+---------------------------------|
   |         80486SX          |          5 & 6 closed           |
   |--------------------------+---------------------------------|
   |         80487SX          | pins 2 & 3, 4 & 5, 6 & 7 closed |
   |--------------------------+---------------------------------|
   |         80486DX          | pins 1 & 2, 4 & 5, 6 & 7 closed |
   |--------------------------+---------------------------------|
   |         80486DX2         | pins 1 & 2, 4 & 5, 6 & 7 closed |
   +------------------------------------------------------------+