CRYSTAL COMPUTER SYSTEMS
========================

   CX 425S CACHE

                                                                  
   Processor             80386SX/CX486SLC                         
   Processor Speed       25/33MHz                                 
   Chip Set              OPTI                                     
   Max. Onboard DRAM     16MB                                     
   Cache                 16/32/64/128KB                           
   BIOS                  AMI/Award                                
   Dimensions            220mm x 220mm                            
   I/O Options           None                                     
   NPU Options           80387SX/CX83S87                          
                                                                  

<gopher://bitreich.org/I/th99/m/C-D/31020-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | External battery    |    J1    | Turbo LED      |   JP4    |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |   J18    | Reset switch   |   SW1    |
   |---------------------+----------+----------------+----------|
   | Speaker             |   J19    | Turbo switch   |   SW2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Battery type select internal     |  JP1   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery type select external     |  JP1   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color (Auto  |  JP2   |    Open    |
   |   | detect)                          |        |            |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP2   |   Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |   Bank 0   |   Bank 1   |   Bank 2   |   Bank 3   |
   |--------+------------+------------+------------+------------|
   | 512KB  | (2) 256K x |    NONE    |    NONE    |    NONE    |
   |        |     9      |            |            |            |
   |--------+------------+------------+------------+------------|
   |  1MB   | (2) 256K x | (2) 256K x |    NONE    |    NONE    |
   |        |     9      |     9      |            |            |
   |--------+------------+------------+------------+------------|
   | 1.5MB  | (2) 256K x | (2) 256K x | (2) 256K x |    NONE    |
   |        |     9      |     9      |     9      |            |
   |--------+------------+------------+------------+------------|
   |  2MB   | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
   |        |     9      |     9      |     9      |     9      |
   |--------+------------+------------+------------+------------|
   |  2MB   | (2) 1M x 9 |    NONE    |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 2.5MB  | (2) 1M x 9 | (2) 256K x |    NONE    |    NONE    |
   |        |            |     9      |            |            |
   |--------+------------+------------+------------+------------|
   |  3MB   | (2) 1M x 9 | (2) 256K x | (2) 256K x |    NONE    |
   |        |            |     9      |     9      |            |
   |--------+------------+------------+------------+------------|
   | 3.5MB  | (2) 1M x 9 | (2) 256K x | (2) 256K x | (2) 256K x |
   |        |            |     9      |     9      |     9      |
   |--------+------------+------------+------------+------------|
   |  4MB   | (2) 1M x 9 | (2) 1M x 9 |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 4.5MB  | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x |    NONE    |
   |        |            |            |     9      |            |
   |--------+------------+------------+------------+------------|
   |  5MB   | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x | (2) 256K x |
   |        |            |            |     9      |     9      |
   |--------+------------+------------+------------+------------|
   |  6MB   | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |    NONE    |
   |--------+------------+------------+------------+------------|
   | 6.5MB  | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x |
   |        |            |            |            |     9      |
   |--------+------------+------------+------------+------------|
   |  8MB   | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
   |--------+------------+------------+------------+------------|
   |  8MB   | (2) 4M x 9 |    NONE    |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 8.5MB  | (2) 4M x 9 | (2) 256K x |    NONE    |    NONE    |
   |        |            |     9      |            |            |
   |--------+------------+------------+------------+------------|
   |  9MB   | (2) 4M x 9 | (2) 256K x | (2) 256K x |    NONE    |
   |        |            |     9      |     9      |            |
   |--------+------------+------------+------------+------------|
   | 9.5MB  | (2) 4M x 9 | (2) 256K x | (2) 256K x | (2) 256K x |
   |        |            |     9      |     9      |     9      |
   |--------+------------+------------+------------+------------|
   |  10MB  | (2) 4M x 9 | (2) 1M x 9 |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 10.5MB | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x |    NONE    |
   |        |            |            |     9      |            |
   |--------+------------+------------+------------+------------|
   |  11MB  | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x | (2) 256K x |
   |        |            |            |     9      |     9      |
   |--------+------------+------------+------------+------------|
   |  12MB  | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 |    NONE    |
   |--------+------------+------------+------------+------------|
   | 12.5MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x |
   |        |            |            |            |     9      |
   |--------+------------+------------+------------+------------|
   |  14MB  | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
   |--------+------------+------------+------------+------------|
   |  16MB  | (2) 4M x 9 | (2) 4M x 9 |    NONE    |    NONE    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   | TAG (U32)  | TAG (U33)  |
   |-------+-------------+------------+------------+------------|
   | 16KB  | (2) 8K x 8  |    NONE    | (1) 8K x 8 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 32KB  | (2) 8K x 8  | (2) 8K x 8 | (1) 8K x 8 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 64KB  | (2) 32K x 8 |    NONE    | (1) 8K x 8 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 128KB | (2) 32K x 8 | (2) 32K x  | (1) 8K x 8 | (1) 8K x 8 |
   |       |             |     8      |            |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size  |  JP3   |  JP5   |  JP6   |  JP7  |  JP8   |  JP9  |
   |--------+--------+--------+--------+-------+--------+-------|
   |  16KB  |  Open  |  Open  |  Open  | 2 & 3 |  Open  | 2 & 3 |
   |--------+--------+--------+--------+-------+--------+-------|
   |  32KB  |  Open  | Closed |  Open  | 2 & 3 |  Open  | 2 & 3 |
   |--------+--------+--------+--------+-------+--------+-------|
   |  64KB  |  Open  | Closed | Closed | 1 & 2 |  Open  | 2 & 3 |
   |--------+--------+--------+--------+-------+--------+-------|
   | 128KB  | Closed | Closed | Closed | 1 & 2 | Closed | 1 & 2 |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+