(TXT) View Source
       
       # INFOMATIC POWER SYSTEMS CORPORATION
       
          OPTI-495SX 3/486WB CACHE
       
          Processor    80386DX/80486SX/80487SX/80486DX/ODP486SX/80486DX2 
          Processor    25/33/40/50(internal)/50/66(internal)MHz          
          Speed        
          Chip Set     OPTI                                              
          Max. Onboard 32MB                                              
          DRAM         
          Cache        64/128/256KB                                      
          BIOS         AMI                                               
          Dimensions   254mm x 218mm                                     
          I/O Options  32-bit VESA local bus slot (Non-functional)       
          NPU Options  80387                                             
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | Power LED &       |    J1    | Reset switch     |    J5    |
          | keylock           |          |                  |          |
          |-------------------+----------+------------------+----------|
          | Speaker           |    J2    | External battery |   JP18   |
          |-------------------+----------+------------------+----------|
          | Turbo switch      |    J3    | 32-bit VESA card |    S1    |
          |-------------------+----------+------------------+----------|
          | Turbo LED         |    J4    |                  |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP8   |  unknown   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP9   |  unknown   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP10  |  unknown   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP11  |  unknown   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select color        |  JP17  |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select monochrome   |  JP17  |    open    |
          |---+----------------------------------+--------+------------|
          | » | CMOS memory normal operation     |  JP18  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |  JP18  | pins 3 & 4 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | External battery select          |  JP18  | connected  |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP23  |    open    |
          |   | alter                            |        |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Size   |   JP6    |   JP7   |  JP12   |       JP13        |
          |---------+----------+---------+---------+-------------------|
          |  64KB   |   open   |  open   |  open   | pins 2 & 3 closed |
          |---------+----------+---------+---------+-------------------|
          |  128KB  |   open   | closed  | closed  | pins 1 & 2 closed |
          |---------+----------+---------+---------+-------------------|
          |  256KB  |  closed  | closed  | closed  | pins 2 & 3 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |     Cache     |   Location    |      TAG      |
          |------------+---------------+---------------+---------------|
          |    64KB    |  (8) 8K x 8   |  Banks 0 & 1  |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |    Bank 0     |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (8) 32K x 8  |  Banks 0 & 1  |  (1) 32K x 8  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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) 256K x 9     |      (4) 1 x 9      |
          |----------------+---------------------+---------------------|
          |      8MB       |     (4) 1M x 9      |     (4) 1M x 9      |
          |----------------+---------------------+---------------------|
          |      16MB      |     (4) 4M x 9      |        NONE         |
          |----------------+---------------------+---------------------|
          |      20MB      |     (4) 1M x 9      |     (4) 4M x 9      |
          |----------------+---------------------+---------------------|
          |      32MB      |     (4) 4M x 9      |     (4) 4M x 9      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU MODE CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Mode    |   JP3    |   JP5    |  JP20  |  JP21  |  JP24  |
          |-----------+----------+----------+--------+--------+--------|
          |    486    | pins 1 & | pins 2 & |  open  |  N/A   | pins 2 |
          |  (PQFP)   |    2     |    3     |        |        |  & 3   |
          |-----------+----------+----------+--------+--------+--------|
          | 486 (PGA) | pins 1 & | pins 2 & | closed | closed | pins 2 |
          |           |    2     |    3     |        |        |  & 3   |
          |-----------+----------+----------+--------+--------+--------|
          |    386    | pins 2 & | pins 1 & |  N/A   |  open  | pins 1 |
          |  (PQFP)   |    3     |    2     |        |        |  & 2   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU TYPE CONFIGURATION (PQFP)                |
          |------------------------------------------------------------|
          |     Type      |      JP14       |  JP22  |  JP51  |  JP52  |
          |---------------+-----------------+--------+--------+--------|
          | 80486SX-33MHz |   pins 1 & 2    |  N/A   |  open  | closed |
          |               |     closed      |        |        |        |
          |---------------+-----------------+--------+--------+--------|
          | 80486SX-25MHz |   pins 1 & 2    |  N/A   | closed |  open  |
          |               |     closed      |        |        |        |
          |---------------+-----------------+--------+--------+--------|
          | 80386DX-40MHz |   pins 2 & 3    |  open  |  open  |  open  |
          |               |     closed      |        |        |        |
          |---------------+-----------------+--------+--------+--------|
          | 80386DX-33MHz |   pins 2 & 3    | closed |  open  | closed |
          |               |     closed      |        |        |        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CPU TYPE CONFIGURATION (PGA)                |
          |------------------------------------------------------------|
          |     Type     | JP1  |  JP2   |  JP4  | JP14  | JP51 | JP52 |
          |--------------+------+--------+-------+-------+------+------|
          |80486DX2-66MHz|closed|pins 1 &|pins 1 |pins 1 | open |closed|
          |              |      |   2    |  & 2  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80486DX2-50MHz|closed|pins 1 &|pins 1 |pins 1 |closed| open |
          |              |      |   2    |  & 2  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |ODP486SX-33MHz|closed|pins 1 &|pins 2 |pins 1 | open |closed|
          |              |      |   2    |  & 3  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |ODP486SX-25MHz|closed|pins 1 &|pins 2 |pins 1 |closed| open |
          |              |      |   2    |  & 3  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80486DX-50MHz |closed|pins 1 &|pins 1 |pins 2 |closed| open |
          |              |      |   2    |  & 2  |  & 3  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80486DX-33MHz |closed|pins 1 &|pins 1 |pins 1 | open |closed|
          |              |      |   2    |  & 2  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80486DX-25MHz |closed|pins 1 &|pins 1 |pins 1 |closed| open |
          |              |      |   2    |  & 2  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80487SX-33MHz |closed|pins 1 &|pins 2 |pins 1 | open |closed|
          |              |      |   2    |  & 3  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80487SX-25MHz |closed|pins 1 &|pins 2 |pins 1 |closed| open |
          |              |      |   2    |  & 3  |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80486SX-33MHz | open |pins 2 &| open  |pins 1 | open |closed|
          |              |      |   3    |       |  & 2  |      |      |
          |--------------+------+--------+-------+-------+------+------|
          |80486SX-25MHz | open |pins 2 &| open  |pins 1 |closed| open |
          |              |      |   3    |       |  & 2  |      |      |
          +------------------------------------------------------------+