JOINDATA SYSTEMS, INC.
======================

   G486ULB

   Processor            80486SX/80487SX/80486DX/ODP486SX/80486DX2 
   Processor Speed      20/25/33/50(internal)/50/66(internal)MHz  
   Chip Set             EFAR                                      
   Max. Onboard DRAM    32MB                                      
   Cache                64/128/256KB                              
   BIOS                 AMI                                       
   Dimensions           330mm x 218mm                             
   I/O Options          32-bit local bus card slots (2)           
   NPU Options          None                                      

<gopher://bitreich.org/I/th99/m/I-L/31113-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose      | Location | Purpose              | Location  |
   |--------------+----------+----------------------+-----------|
   | Reset switch |    J9    | Power LED & keylock  |    J13    |
   |--------------+----------+----------------------+-----------|
   | Turbo LED    |   J10    | External battery     |    J14    |
   |--------------+----------+----------------------+-----------|
   | Turbo switch |   J11    | 32-bit local bus     | S15 & S16 |
   |              |          | card slots           |           |
   |--------------+----------+----------------------+-----------|
   | Speaker      |   J12    |                      |           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Factory configured - do not      |  J18   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  W10   |    N/A     |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP15  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP15  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 1M 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      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  | Bank 0  | Bank 1  |   TAG   |   TAG   | Dirty(U48) |
   |       |         |         |  (U38,  |  (U40)  |            |
   |       |         |         |  U39)   |         |            |
   |-------+---------+---------+---------+---------+------------|
   | 64KB  | (4) 8K  | (4) 8K  | (2) 16K |  NONE   | (1) 16K x  |
   |       |   x 8   |   x 8   |   x 4   |         |     4      |
   |-------+---------+---------+---------+---------+------------|
   | 64KB  | (4) 8K  | (4) 8K  |  NONE   | (1) 8K  | (1) 16K x  |
   |       |   x 8   |   x 8   |         |   x 8   |     4      |
   |-------+---------+---------+---------+---------+------------|
   | 128KB | (4) 32K |  NONE   | (2) 16K |  NONE   | (1) 16K x  |
   |       |   x 8   |         |   x 4   |         |     4      |
   |-------+---------+---------+---------+---------+------------|
   | 128KB | (4) 32K |  NONE   |  NONE   | (1) 8K  | (1) 16K x  |
   |       |   x 8   |         |         |   x 8   |     4      |
   |-------+---------+---------+---------+---------+------------|
   | 256KB | (4) 32K | (4) 32K | (2) 16K |  NONE   | (1) 16K x  |
   |       |   x 8   |   x 8   |   x 4   |         |     4      |
   |-------+---------+---------+---------+---------+------------|
   | 256KB | (4) 32K | (4) 32K |  NONE   | (1) 32K | (1) 16K x  |
   |       |   x 8   |   x 8   |         |   x 8   |     4      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |   W14    |   W15    |   W16   |  W17   |  W18   |
   |----------+----------+----------+---------+--------+--------|
   |   64KB   |  1 & 2   |   Open   |  1 & 2  | 1 & 2  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  128KB   |  2 & 3   |  1 & 2   |  1 & 2  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  256KB   |  1 & 2   |  2 & 3   |  2 & 3  | 2 & 3  | 2 & 3  |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Type     | OSC1  |    W11     |    W12     |    W13     |
   |-------------+-------+------------+------------+------------|
   | 80486SX-20  | 20MHz |    Open    |    Open    | pins 1 & 2 |
   |             |       |            |            |   closed   |
   |-------------+-------+------------+------------+------------|
   | 80486SX-25  | 25MHz |    Open    |    Open    | pins 1 & 2 |
   |             |       |            |            |   closed   |
   |-------------+-------+------------+------------+------------|
   | 80486DX-25  | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
   |             |       |   closed   |   closed   |   closed   |
   |-------------+-------+------------+------------+------------|
   | 80486DX-33  | 33MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
   |             |       |   closed   |   closed   |   closed   |
   |-------------+-------+------------+------------+------------|
   | 80486DX-50  | 50MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
   |             |       |   closed   |   closed   |   closed   |
   |-------------+-------+------------+------------+------------|
   | 80486DX2-50 | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
   |             |       |   closed   |   closed   |   closed   |
   |-------------+-------+------------+------------+------------|
   | 80486DX2-66 | 33MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
   |             |       |   closed   |   closed   |   closed   |
   +------------------------------------------------------------+