(TXT) View Source
       
       # YOUNG MICRO SYSTEMS, INC.
       
          VEGA 3-486 CACHE
       
          Processor    80386DX/80486SX/80487SX/80486DX/ODP486SX/80486DX2 
          Processor    16/20/25/33/40/50/66(internal)MHz                 
          Speed        
          Chip Set     Symphony                                          
          Max. Onboard 32MB                                              
          DRAM         
          Cache        64/256KB                                          
          BIOS         AMI                                               
          Dimensions   330mm x 218mm                                     
          I/O Options  None                                              
          NPU Options  80387                                             
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose        | Location | Purpose             | Location |
          |----------------+----------+---------------------+----------|
          | Turbo switch   |    C1    | Power LED & keylock |    C4    |
          |----------------+----------+---------------------+----------|
          | Turbo LED      |    C2    | Speaker             |    C5    |
          |----------------+----------+---------------------+----------|
          | Reset switch   |    C3    |                     |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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        |
          |------------------+--------------------+--------------------|
          |       32MB       |     (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  |       P26       |       P27       |      P31       |
          |-------+-----------------+-----------------+----------------|
          | 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     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Type     |   P24   |   P25   |  P28   |  P30   |  P32   |
          |-------------+---------+---------+--------+--------+--------|
          |   80386DX   |  2 & 3  |  1 & 2  | 1 & 2  | 1 & 2  | 1 & 2  |
          |-------------+---------+---------+--------+--------+--------|
          |   80486SX   |  2 & 3  |  2 & 3  | 2 & 3  | 2 & 3  | 2 & 3  |
          |-------------+---------+---------+--------+--------+--------|
          | 80486DX-25  |  2 & 3  |  2 & 3  | 2 & 3  | 2 & 3  | 2 & 3  |
          |-------------+---------+---------+--------+--------+--------|
          | 80486DX-33  |  2 & 3  |  2 & 3  | 2 & 3  | 2 & 3  | 2 & 3  |
          |-------------+---------+---------+--------+--------+--------|
          | 80486DX-50  |  1 & 2  |  2 & 3  | 2 & 3  | 2 & 3  | 2 & 3  |
          |-------------+---------+---------+--------+--------+--------|
          | 80486DX2-50 |  2 & 3  |  2 & 3  | 2 & 3  | 2 & 3  | 2 & 3  |
          |-------------+---------+---------+--------+--------+--------|
          | 80486DX2-66 |  2 & 3  |  2 & 3  | 2 & 3  | 2 & 3  | 2 & 3  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU TYPE CONFIGURATION (CON'T)               |
          |------------------------------------------------------------|
          |    Type     |  P33   |   P35   |   P36   |  P37   |  P38   |
          |-------------+--------+---------+---------+--------+--------|
          |   80386DX   | 1 & 2  | Closed  | Closed  |  Open  |  Open  |
          |-------------+--------+---------+---------+--------+--------|
          |   80486SX   | 2 & 3  |  Open   |  Open   |  Open  |  Open  |
          |-------------+--------+---------+---------+--------+--------|
          | 80486DX-25  | 2 & 3  |  Open   |  Open   |  Open  |  Open  |
          |-------------+--------+---------+---------+--------+--------|
          | 80486DX-33  | 2 & 3  |  Open   |  Open   |  Open  |  Open  |
          |-------------+--------+---------+---------+--------+--------|
          | 80486DX-50  | 2 & 3  |  Open   |  Open   | Closed | Closed |
          |-------------+--------+---------+---------+--------+--------|
          | 80486DX2-50 | 2 & 3  |  Open   |  Open   |  Open  |  Open  |
          |-------------+--------+---------+---------+--------+--------|
          | 80486DX2-66 | 2 & 3  |  Open   |  Open   |  Open  |  Open  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU TYPE CONFIGURATION (CON'T)               |
          |------------------------------------------------------------|
          |   Type    |  P39   |  P40   |  P41  |  P42  |  P43  | P44  |
          |-----------+--------+--------+-------+-------+-------+------|
          |  80386DX  | Closed |  N/A   |  N/A  |  N/A  |  N/A  |1 & 2 |
          |-----------+--------+--------+-------+-------+-------+------|
          |  80486SX  |  Open  |  Open  | Open  | Open  |Closed |2 & 3 |
          |-----------+--------+--------+-------+-------+-------+------|
          |80486DX-25 |  Open  | Closed |Closed |Closed | Open  |2 & 3 |
          |-----------+--------+--------+-------+-------+-------+------|
          |80486DX-33 |  Open  | Closed |Closed |Closed | Open  |2 & 3 |
          |-----------+--------+--------+-------+-------+-------+------|
          |80486DX-50 |  Open  | Closed |Closed |Closed | Open  |2 & 3 |
          |-----------+--------+--------+-------+-------+-------+------|
          |80486DX2-50|  Open  | Closed |Closed |Closed | Open  |2 & 3 |
          |-----------+--------+--------+-------+-------+-------+------|
          |80486DX2-66|  Open  | Closed |Closed |Closed | Open  |2 & 3 |
          |------------------------------------------------------------|
          |Note: Pins designated should be in the closed.              |
          +------------------------------------------------------------+