FOCUS INFORMATION SYSTEMS, INC.
===============================

   486IU

   Processor             80486SX/80487SX/80486DX                  
   Processor Speed       25/33/40/50MHz                           
   Chip Set              UMC                                      
   Max. Onboard DRAM     64MB                                     
   Cache                 64/128/256/512/1024KB                    
   BIOS                  AMI/MR                                   
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/E-H/30255-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |    J2    | Power LED &       |    J9    |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |    J7    | Turbo LED         |   W14    |
   |------------------+----------+-------------------+----------|
   | Speaker          |    J8    | Reset switch      |   W15    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |   J1   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |   J1   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select color      |   W1   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |   W1   |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 1MB  | (4) 256K x  |    NONE     |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 2MB  | (4) 256K x  | (4) 256K x  |    NONE    |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 3MB  | (4) 256K x  | (4) 256K x  | (4) 256K x |    NONE    |
   |      |      9      |      9      |     9      |            |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 256K x  | (4) 256K x  | (4) 256K x | (4) 256K x |
   |      |      9      |      9      |     9      |     9      |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 1M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 5MB  | (4) 256K x  | (4) 1M x 9  |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 6MB  | (4) 256K x  | (4) 256K x  | (4) 1M x 9 |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (4) 1M x 9  | (4) 1M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 9MB  | (4) 256K x  | (4) 1M x 9  | (4) 1M x 9 |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 10MB | (4) 256K x  | (4) 256K x  | (4) 1M x 9 | (4) 1M x 9 |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 12MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 16MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
   |------+-------------+-------------+------------+------------|
   | 16MB | (4) 4M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 20MB | (4) 1M x 9  | (4) 4M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 24MB | (4) 1M x 9  | (4) 1M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 32MB | (4) 4M x 9  | (4) 4M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 36MB | (4) 1M x 9  | (4) 4M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 40MB | (4) 1M x 9  | (4) 1M x 9  | (4) 4M x 9 | (4) 4M x 9 |
   |------+-------------+-------------+------------+------------|
   | 48MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 64MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |    CPU    |   W3   |   W17    |     W18      |     W19     |
   |-----------+--------+----------+--------------+-------------|
   |  80486SX  |  Open  |   Open   |     Open     | pins 2 & 3  |
   |           |        |          |              |   closed    |
   |-----------+--------+----------+--------------+-------------|
   |  80487SX  |  Open  |  Closed  |  pins 2 & 3  | pins 1 & 2  |
   |           |        |          |    closed    |   closed    |
   |-----------+--------+----------+--------------+-------------|
   |  80486DX  |  Open  |  Closed  |  pins 1 & 2  | pins 1 & 2  |
   |           |        |          |    closed    |   closed    |
   |------------------------------------------------------------|
   | Note:When a 20MHz 80486SX CPU is used, W3 is closed and a  |
   | 40MHz clock is installed.                                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |   Bank 0   |   Bank 1   | TAG (U25,  | TAG (U36)  |
   |        |            |            | U34, U35)  |            |
   |--------+------------+------------+------------+------------|
   |  64KB  | (4) 8K x 8 | (4) 8K x 8 | (3) 16K x  |    NONE    |
   |        |            |            |     4      |            |
   |--------+------------+------------+------------+------------|
   | 128KB  | (4) 32K x  |    NONE    | (3) 16K x  |    NONE    |
   |        |     8      |            |     4      |            |
   |--------+------------+------------+------------+------------|
   | 256KB  | (4) 32K x  | (4) 32K x  | (3) 16K x  |    NONE    |
   |        |     8      |     8      |     4      |            |
   |--------+------------+------------+------------+------------|
   | 512KB  | (4) 128K x |    NONE    | (3) 64K x  | (1) 64K x  |
   |        |     8      |            |     4      |     4      |
   |--------+------------+------------+------------+------------|
   | 1024KB | (4) 128K x | (4) 128K x | (3) 64K x  | (1) 64K x  |
   |        |     8      |     8      |     4      |     4      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size | W7 | W8 |W9 |W10 |W12 | W13  | W20 |W21 | W22 | W23 |
   |------+----+----+---+----+----+------+-----+----+-----+-----|
   | 64KB |1 & |1 & |1 &|1 & |1 & |Closed|1 & 2|2 & |Open |Open |
   |      | 2  | 2  | 2 | 2  | 2  |      |     | 3  |     |     |
   |------+----+----+---+----+----+------+-----+----+-----+-----|
   |128KB |1 & |1 & |2 &|1 & |1 & |Closed|2 & 3|1 & |Open |Open |
   |      | 2  | 2  | 3 | 2  | 2  |      |     | 2  |     |     |
   |------+----+----+---+----+----+------+-----+----+-----+-----|
   |256KB |1 & |2 & |2 &|1 & |1 & |Closed|1 & 2|2 & |Open |Open |
   |      | 2  | 3  | 3 | 2  | 2  |      |     | 3  |     |     |
   |------+----+----+---+----+----+------+-----+----+-----+-----|
   |512KB |2 & |2 & |2 &|2 & |1 & | Open |Open |1 & |2 & 3|1 & 2|
   |      | 3  | 3  | 3 | 3  | 2  |      |     | 2  |     |     |
   |------+----+----+---+----+----+------+-----+----+-----+-----|
   |1024KB|2 & |2 & |2 &|2 & |2 & | Open |Open |1 & |1 & 2|2 & 3|
   |      | 3  | 3  | 3 | 3  | 3  |      |     | 2  |     |     |
   |------------------------------------------------------------|
   |Note:Pins designated should be in the closed position.      |
   +------------------------------------------------------------+