(TXT) View Source
       
       # GIGA-BYTE TECHNOLOGY CO., LTD.
       
          GA-486SA
       
          Processor          80486SX/80487SX/80486DX/ODP486SX/80486DX2   
          Processor Speed    16/20/25/33/50(internal)/50/66(internal)MHz 
          Chip Set           OPTI                                        
          Max. Onboard DRAM  128MB                                       
          Cache              64/128/256/512KB                            
          BIOS               AMI                                         
          Dimensions         330mm x 218mm                               
          I/O Options        32-bit local bus card slots (2)             
          NPU Options        4167                                        
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose     | Location | Purpose                | Location |
          |-------------+----------+------------------------+----------|
          | Power LED & |    J1    | Turbo switch           |    J4    |
          | keylock     |          |                        |          |
          |-------------+----------+------------------------+----------|
          | Reset       |    J2    | Turbo LED              |    J5    |
          |-------------+----------+------------------------+----------|
          | Speaker     |    J3    | 32-bit local bus cards | S1 & S2  |
          |             |          | (2)                    |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function              | Jumper |   Position   |
          |------------------------------------+--------+--------------|
          | » | CPU type select 80486DX        |   J6   |  pins 1 & 2  |
          |   |                                |        |    closed    |
          |---+--------------------------------+--------+--------------|
          |   | CPU type select 80486SX        |   J6   |  pins 2 & 3  |
          |   |                                |        |    closed    |
          |---+--------------------------------+--------+--------------|
          | » | Monitor type select color      |  J14   |    Closed    |
          |---+--------------------------------+--------+--------------|
          |   | Monitor type select monochrome |  J14   |     Open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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        |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       64MB       |    (4) 16M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |      128MB       |    (4) 16M x 9     |    (4) 16M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |      TAG      |
          |------------+---------------+---------------+---------------|
          |    64KB    |  (4) 8K x 8   |  (4) 8K x 8   |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
          |------------+---------------+---------------+---------------|
          |   512KB    | (4) 128K x 8  |     NONE      |  (1) 32K x 8  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Size   |    J8    |   J9    |   J10   |        J11        |
          |---------+----------+---------+---------+-------------------|
          |  64KB   |   Open   |  Open   |  Open   |       Open        |
          |---------+----------+---------+---------+-------------------|
          |  128KB  |   Open   | Closed  |  Open   | pins 1 & 2 closed |
          |---------+----------+---------+---------+-------------------|
          |  256KB  |   Open   | Closed  | Closed  | pins 2 & 3 closed |
          |---------+----------+---------+---------+-------------------|
          |  512KB  |  Closed  | Closed  | Closed  | pins 1 & 2 closed |
          +------------------------------------------------------------+