JC INFORMATION SYSTEMS CORPORATION
==================================

   MODEL 2020

   Processor           80386DX                                    
   Processor Speed     25/33MHz                                   
   Chip Set            C & T PEAK/DM                              
   Max. Onboard DRAM   32MB                                       
   Cache               64KB                                       
   BIOS                C & T/Phoenix                              
   Dimensions          330mm x 218mm                              
   I/O Options         32-bit external memory card slot           
   NPU Options         80387                                      

<gopher://bitreich.org/I/th99/m/I-L/31381-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose               | Location | Purpose      | Location |
   |-----------------------+----------+--------------+----------|
   | External battery      |    J4    | Speaker      |   SPK    |
   |-----------------------+----------+--------------+----------|
   | Power LED & keylock   |   KEYL   | Self test    |   TEST   |
   |-----------------------+----------+--------------+----------|
   | Reset switch          |   RSW    | Turbo LED    |   TLED   |
   |-----------------------+----------+--------------+----------|
   | 32-bit external       |    S1    | Turbo switch |   TSW    |
   | memory card           |          |              |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W2   |    open    |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W3   | pins 1 & 2 |
   |   | alter                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W6   |   closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W9   | pins 2 & 3 |
   |   | alter                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  W10   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  W10   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  W11   |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  W11   |    open    |
   |------------------------------------------------------------|
   | Note:The locations of W2, W3, W6, and W9 are unknown.      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |    Bank 0     |    Bank 1     |        W4         |
   |--------+---------------+---------------+-------------------|
   |  1MB   | (4) 256K x 9  |     NONE      | pins 1 & 2 closed |
   |--------+---------------+---------------+-------------------|
   |  2MB   | (4) 256K x 9  | (4) 256K x 9  | pins 1 & 2 closed |
   |--------+---------------+---------------+-------------------|
   |  4MB   |  (4) 1M x 9   |     NONE      | pins 1 & 2 closed |
   |--------+---------------+---------------+-------------------|
   |  5MB   |  (4) 1M x 9   | (4) 256K x 9  | pins 2 & 3 closed |
   |--------+---------------+---------------+-------------------|
   |  8MB   |  (4) 1M x 9   |  (4) 1M x 9   | pins 1 & 2 closed |
   |--------+---------------+---------------+-------------------|
   |  16MB  |  (4) 4M x 9   |     NONE      | pins 1 & 2 closed |
   |--------+---------------+---------------+-------------------|
   |  32MB  |  (4) 4M x 9   |  (4) 4M x 9   | pins 1 & 2 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |  Cache CACHE  |   Location    |      TAG      |
   |------------+---------------+---------------+---------------|
   |    64KB    |  (8) 8K x 8   |     CACHE     |  (2) 16K x 1  |
   +------------------------------------------------------------+