JETPRO INFOTECH COMPANY, LTD.
=============================

   MB-4F2

   Processor    80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2 
   Processor    20/25/33/40/50(internal)/50/66(internal)MHz       
   Speed        
   Chip Set     FOREX                                             
   Max. Onboard 32MB                                              
   DRAM         
   Cache        64/128/256KB                                      
   BIOS         AMI/AWARD                                         
   Dimensions   220.2mm x 250.2mm                                 
   I/O Options  32-bit local bus card slot                        
   NPU Options  80387                                             

<gopher://bitreich.org/I/th99/m/I-L/31403-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | External battery  |   JP2    | Turbo switch     |   JP15   |
   |-------------------+----------+------------------+----------|
   | Reset switch      |   JP8    | Turbo LED        |   JP16   |
   |-------------------+----------+------------------+----------|
   | Power LED &       |   JP9    | 32-bit local bus |    S1    |
   | keylock           |          | card             |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |   JP10   |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal (internal     |  JP2   | pins 1 and |
   |   | battery)                         |        |  2 closed  |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory normal (external     |  JP2   | connected  |
   |   | battery)                         |        |            |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP2   |    open    |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP5   |   closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP6   |    open    |
   |   | alter                            |        |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |    CPU    |    JP12    |  JP13  |  JP30  |  W1B   | W1C-K  |
   |-----------+------------+--------+--------+--------+--------|
   | 80486DX2  | pins 1 & 2 | pins 1 | pins 1 | pins 1 | pins 1 |
   |           |            |  & 2   |  & 2   |  & 2   |  & 2   |
   |-----------+------------+--------+--------+--------+--------|
   |  80486DX  | pins 1 & 2 | pins 1 | pins 1 | pins 1 | pins 1 |
   |           |            |  & 2   |  & 2   |  & 2   |  & 2   |
   |-----------+------------+--------+--------+--------+--------|
   |  80487SX  | pins 1 & 2 | pins 1 | pins 2 | pins 1 | pins 1 |
   |           |            |  & 2   |  & 3   |  & 2   |  & 2   |
   |-----------+------------+--------+--------+--------+--------|
   |  80486SX  | pins 2 & 3 | pins 2 | pins 2 | pins 1 | pins 1 |
   |           |            |  & 3   |  & 3   |  & 2   |  & 2   |
   |-----------+------------+--------+--------+--------+--------|
   | CX486DLC  |    N/A     |  N/A   |  N/A   | pins 1 | pins 2 |
   |           |            |        |        |  & 2   |  & 3   |
   |-----------+------------+--------+--------+--------+--------|
   |  80386DX  |    N/A     |  N/A   |  N/A   | pins 2 | pins 2 |
   |           |            |        |        |  & 3   |  & 3   |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  | Cache CACHE |  Location  |   TAG(0)   |   TAG(1)   |
   |-------+-------------+------------+------------+------------|
   | 64KB  | (8) 8K x 8  | Banks 0 &  | (1) 8K x 8 |    NONE    |
   |       |             |     1      |            |            |
   |-------+-------------+------------+------------+------------|
   | 128KB | (4) 32K x 8 |   Bank 0   | (1) 8K x 8 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 256KB | (8) 32K x 8 | Banks 0 &  | (1) 8K x 8 | (1) 8K x 8 |
   |       |             |     1      |            |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |    JP8A    |   JP8B   |   JP8C   |  JP8E  |  JP8F  |
   |-------+------------+----------+----------+--------+--------|
   | 64KB  | pins 2 & 3 | pins 1 & | pins 1 & | pins 2 | pins 1 |
   |       |            |    2     |    2     |  & 3   |  & 2   |
   |-------+------------+----------+----------+--------+--------|
   | 128KB | pins 1 & 2 | pins 2 & | pins 2 & | pins 1 | pins 1 |
   |       |            |    3     |    3     |  & 2   |  & 2   |
   |-------+------------+----------+----------+--------+--------|
   | 256KB | pins 2 & 3 | pins 1 & | pins 1 & | pins 1 | pins 2 |
   |       |            |    2     |    2     |  & 2   |  & 3   |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+