(TXT) View Source
       
       # ATEN RESEARCH, INC.
       
          486 LOCAL BUS MAINBOARD
       
          Processor             80486SX/80486DX/80486DX2                 
          Processor Speed       20/25/33/50(internal)/50/66(internal)MHz 
          Chip Set              OPTI                                     
          Max. Onboard DRAM     64MB                                     
          Cache                 64/256KB                                 
          BIOS                  AMI                                      
          Dimensions            330mm x 218mm                            
          I/O Options           32-bit local bus card slot               
          NPU Options           4167                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location  | Purpose          | Location |
          |------------------+-----------+------------------+----------|
          | External battery | J2 pins 1 | Speaker          |    J6    |
          |                  |    & 4    |                  |          |
          |------------------+-----------+------------------+----------|
          | Turbo switch     |    J3     | Power LED &      |    J7    |
          |                  |           | keylock          |          |
          |------------------+-----------+------------------+----------|
          | Reset switch     |    J4     | 32-bit local bus |    S1    |
          |                  |           | card             |          |
          |------------------+-----------+------------------+----------|
          | Turbo LED        |    J5     |                  |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Battery type select internal     |   J2   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery type select external     |   J2   | pins 1 & 4 |
          |   |                                  |        | connected  |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select color        |  JP1   |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select monochrome   |  JP1   |    open    |
          |---+----------------------------------+--------+------------|
          | » | CMOS memory normal operation     |  JP2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |  JP2   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | VGA card type select ISA         |  JP3   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |   |                                  |  JP4   |            |
          |   |                                  |        | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VGA card type select local bus   |  JP3   | pins 2 & 3 |
          |   | with ET 4000 chipset             |        |   closed   |
          |   |                                  |  JP4   |            |
          |   |                                  |        | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VGA card type select local bus   |  JP3   | pins 2 & 3 |
          |   | with S3 chipset                  |        |   closed   |
          |   |                                  |  JP4   |            |
          |   |                                  |        | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | I/O Bus speed select ATCLK/4     |  JP5   |    open    |
          |---+----------------------------------+--------+------------|
          |   | I/O Bus speed select ATCLK/6     |  JP5   |   closed   |
          |---+----------------------------------+--------+------------|
          | » | CPU speed select iOSC/2          |  JP9   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CPU speed select iOSC/1          |  JP9   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     CPU CONFIGURATION                      |
          |------------------------------------------------------------|
          | CPU Type  |        JP6        |        JP7        |  JP8   |
          |-----------+-------------------+-------------------+--------|
          | 80486DX2  | pins 1 & 2 closed | pins 2 & 3 closed | closed |
          |-----------+-------------------+-------------------+--------|
          |  80486DX  | pins 1 & 2 closed | pins 2 & 3 closed | closed |
          |-----------+-------------------+-------------------+--------|
          |  80486SX  | pins 2 & 3 closed |       open        |  open  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SRAM JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |   Size    |    JP10    |    JP11    |   JP12   |   JP13    |
          |-----------+------------+------------+----------+-----------|
          |   64KB    |    open    |    open    |   open   |   open    |
          |-----------+------------+------------+----------+-----------|
          |   256KB   |   closed   |   closed   |   open   |  closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |  Cache SRAM   |   TAG (U46)   |   TAG (U47)   |
          |------------+---------------+---------------+---------------|
          |    64KB    |  (8) 8K x 8   |  (1) 64K x 1  |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (8) 32K x 8  |  (1) 64K x 1  |  (1) 32K x 8  |
          |------------------------------------------------------------|
          | Note:Locations of U46 and U47 are unknown.                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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      |
          |------+-------------+-------------+------------+------------|
          | 5MB  | (4) 1M x 9  | (4) 256K x  |    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    |
          |------+-------------+-------------+------------+------------|
          | 13MB | (4) 256K x  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
          |      |      9      |             |            |            |
          |------+-------------+-------------+------------+------------|
          | 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    |
          |------+-------------+-------------+------------+------------|
          | 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 |
          +------------------------------------------------------------+