PINE TECHNOLOGY
===============

   PT-428

   Processor         80486SX/80486DX/80486DX2                     
   Processor Speed   25/33/40/50(internal)/50/66(internal)MHz     
   Chip Set          UMC                                          
   Max. Onboard DRAM 32MB                                         
   Cache             32/64/128/256KB                              
   BIOS              AMI                                          
   Dimensions        250mm x 220mm                                
   I/O Options       32-bit VESA local bus slots (3)              
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/P-R/31970-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |    J1    | Speaker           |    J5    |
   |------------------+----------+-------------------+----------|
   | Reset switch     |    J2    | Power LED &       |    J6    |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |    J3    | 32-bit VESA Local | SL1,SL2  |
   |                  |          | bus slots         |  & SL3   |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |    J4    |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Battery type select - internal   |  JP1   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery type select - internal   |  JP1   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP2   | pins 1 & 2 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP2   | pins 2 & 3 |
   |   | board                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | VGA card select - normal         |  JP3   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | VGA card select - POWER 9000     |  JP3   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CPU test logic enabled           |  JP6   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | CPU test logic disabled          |  JP6   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | (MCA1) LDEV# direct connect to   |  JP7   | pins 1 & 2 |
   |   | 491 ELBA#                        |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | LDEV# through and gate to 491    |  JP7   | pins 2 & 3 |
   |   | ELBA#                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CPU speed select < 33MHz         |  JP11  |    Open    |
   |---+----------------------------------+--------+------------|
   |   | CPU speed select > 33MHz         |  JP11  |   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) 1M x 9     |    (4) 256K 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      |
   |------------+---------------+---------------+---------------|
   |    32KB    |  (4) 8K x 8   |     NONE      |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |    64KB    |  (4) 8K x 8   |  (4) 8K x 8   |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |  JP12   |  JP13   |  JP14   |  JP15   |  JP16   |
   |----------+---------+---------+---------+---------+---------|
   |   32MB   |  Open   |  2 & 3  |  Open   |  Open   |  Open   |
   |----------+---------+---------+---------+---------+---------|
   |   64KB   |  Open   |  1 & 2  |  Open   | Closed  |  Open   |
   |----------+---------+---------+---------+---------+---------|
   |  128KB   |  2 & 3  |  2 & 3  |  Open   | Closed  | Closed  |
   |----------+---------+---------+---------+---------+---------|
   |  256KB   |  1 & 2  |  1 & 2  | Closed  | Closed  | Closed  |
   |------------------------------------------------------------|
   | Note: pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |     CPU Type      |        J17         |        J18        |
   |-------------------+--------------------+-------------------|
   |      80486SX      | pins 2 & 3 closed  |       Open        |
   |-------------------+--------------------+-------------------|
   |    80486DX/DX2    |  pins 1, 2, 3 & 4  | pins 1 & 2 closed |
   |                   |       closed       |                   |
   |-------------------+--------------------+-------------------|
   | Pentium Overdrive |  pins 1, 2, 3 & 4  | pins 2 & 3 closed |
   |                   |       closed       |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |      CPU SPEED CONFIGURATION (CHRONTEL CH9007C CLOCK)      |
   |------------------------------------------------------------|
   |      Speed       |        JP8         |        JP9         |
   |------------------+--------------------+--------------------|
   |      25MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      33MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      40MHz       | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      50iMHz      | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      50MHz       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      66iMHz      | pins 2 & 3 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |       CPU SPEED CONFIGURATION (PHASE LINE PLL52C05)        |
   |------------------------------------------------------------|
   |  Speed   |        JP8        |        JP9        |  JP21   |
   |----------+-------------------+-------------------+---------|
   |  25MHz   | pins 1 & 2 closed | pins 1 & 2 closed | Closed  |
   |----------+-------------------+-------------------+---------|
   |  33MHz   | pins 2 & 3 closed | pins 1 & 2 closed | Closed  |
   |----------+-------------------+-------------------+---------|
   |  40MHz   | pins 1 & 2 closed | pins 2 & 3 closed |  Open   |
   |----------+-------------------+-------------------+---------|
   |  50iMHz  | pins 1 & 2 closed | pins 1 & 2 closed | Closed  |
   |----------+-------------------+-------------------+---------|
   |  50MHz   | pins 2 & 3 closed | pins 2 & 3 closed |  Open   |
   |----------+-------------------+-------------------+---------|
   |  66iMHz  | pins 2 & 3 closed | pins 1 & 2 closed | Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   VESA ID4 CONFIGURATION                   |
   |------------------------------------------------------------|
   |   50MHz delay    |        JP4         |        JP5         |
   |------------------+--------------------+--------------------|
   |     No delay     | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      1 - T       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+