YOUNG MICRO SYSTEMS, INC.
=========================

   VEGA 486 33/50S

   Processor             80486DX                                  
   Processor Speed       33/50MHz                                 
   Chip Set              Symphony                                 
   Max. Onboard DRAM     64MB                                     
   Cache                 64/256KB                                 
   BIOS                  AMI/Phoenix                              
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/U-Z/30235-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Reset switch   |   P19    | Power LED & keylock |   P23    |
   |----------------+----------+---------------------+----------|
   | Turbo switch   |   P21    | Speaker             |   P25    |
   |----------------+----------+---------------------+----------|
   | Turbo LED      |   P22    |                     |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |          Function          |  Jumper   |     Position      |
   |----------------------------+-----------+-------------------|
   | CPU speed select 50MHz     |    J6     | pins 1 & 2 closed |
   |----------------------------+-----------+-------------------|
   | CPU speed select 33MHz     |    J6     | pins 2 & 3 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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      |            |            |
   |------+-------------+-------------+------------+------------|
   | 7MB  | (4) 256K x  | (4) 256K x  | (4) 256K x | (4) 1M x 9 |
   |      |      9      |      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    |
   |------+-------------+-------------+------------+------------|
   | 17MB | (4) 256K x  | (4) 4M x 9  |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 18MB | (4) 256K x  | (4) 256K x  | (4) 4M x 9 |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 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    |
   |------+-------------+-------------+------------+------------|
   | 28MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 | (4) 4M x 9 |
   |------+-------------+-------------+------------+------------|
   | 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    |
   |------+-------------+-------------+------------+------------|
   | 52MB | (4) 1M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 |
   |------+-------------+-------------+------------+------------|
   | 64MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |       J2        |       J5        |       J8       |
   |-------+-----------------+-----------------+----------------|
   | 64KB  |   pins 1 & 2    |   pins 1 & 2    |   pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 256KB |   pins 2 & 3    |   pins 2 & 3    |   pins 2 & 3   |
   |       |     closed      |     closed      |     closed     |
   +------------------------------------------------------------+