ROBOTECH, INC.
==============

   GMB-486UN

   Processor         80486SX/80486DX/80486DX2                     
   Processor Speed   25/33/50/66MHz                               
   Chip Set          UMC                                          
   Max. onboard DRAM 32MB                                         
   Cache             32/64/128/256KB                              
   BIOS              AMI                                          
   Dimensions        254mm x 218mm                                
   I/O Options       None                                         
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/P-R/32171-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |   CN1    | Reset switch      |   CN6    |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |   CN4    | Speaker           |   CN7    |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |   CN5    | Power LED &       |   CN8    |
   |                  |          | keylock           |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Switch |   Setting    |
   |------------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  JP2   | 1 & 2 closed |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  JP2   | 2 & 3 closed |
   |---+--------------------------------+--------+--------------|
   |>> | Hardware Emulate KBGA20        |  JP10  | 1 & 2 closed |
   |---+--------------------------------+--------+--------------|
   |   | Keyboard controller 8042       |  JP10  | 2 & 3 closed |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select color      |  JP12  |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |  JP12  |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 1M x 9       |      (4) 1M x 9       |
   |-----------+------------------------+-----------------------|
   |   20MB    |       (4) 1M x 9       |      (4) 4M x 9       |
   |-----------+------------------------+-----------------------|
   |   20MB    |       (4) 4M x 9       |      (4) 1M x 9       |
   |-----------+------------------------+-----------------------|
   |   32MB    |       (4) 4M x 9       |      (4) 4M x 9       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  EPROM TYPE CONFIGURATION                  |
   |------------------------------------------------------------|
   |     CPU      |   JP3   |   JP7   |      JP9      |  JP13   |
   |--------------+---------+---------+---------------+---------|
   |  80486SX-25  |  2 & 3  |  Open   |     2 & 3     |  2 & 3  |
   |--------------+---------+---------+---------------+---------|
   |  80486DX-33  |  1 & 2  |  1 & 2  | 1 & 2, 3 & 4  |  1 & 2  |
   |--------------+---------+---------+---------------+---------|
   |  80486DX-50  |  2 & 3  |  1 & 2  | 1 & 2, 3 & 4  |  1 & 2  |
   |--------------+---------+---------+---------------+---------|
   | 80486DX2-50  |  1 & 2  |  1 & 2  | 1 & 2, 3 & 4  |  1 & 2  |
   |--------------+---------+---------+---------------+---------|
   | 80486DX2-66  |  1 & 2  |  1 & 2  | 1 & 2, 3 & 4  |  1 & 2  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CACHE TYPE CONFIGURATION                  |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1    |      TAG       |
   |------------+---------------+--------------+----------------|
   |    32KB    |  (4) 8K x 8   |     NONE     |   (1) 8K x 8   |
   |------------+---------------+--------------+----------------|
   |    64KB    |  (4) 8K x 8   |    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 SIZE CONFIGURATION                  |
   |------------------------------------------------------------|
   |   Size    |   JP22   |   JP23   |      JP25      |  JP26   |
   |-----------+----------+----------+----------------+---------|
   |   32KB    |  2 & 3   |   Open   |     2 & 3      |  2 & 3  |
   |-----------+----------+----------+----------------+---------|
   |   64KB    |  1 & 2   |  1 & 2   |  1 & 2, 3 & 4  |  1 & 2  |
   |-----------+----------+----------+----------------+---------|
   |   128KB   |  2 & 3   |  1 & 2   |  1 & 2, 3 & 4  |  1 & 2  |
   |-----------+----------+----------+----------------+---------|
   |   256KB   |  1 & 2   |  1 & 2   |  1 & 2, 3 & 4  |  1 & 2  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              CACHE SIZE CONFIGURATION (CON'T)              |
   |------------------------------------------------------------|
   | Size  |           JP27            |          JP28          |
   |-------+---------------------------+------------------------|
   | 32KB  | 1 & 2, 3 & 4, 5 & 6, 7 &  |          Open          |
   |       |         8, 9 & 10         |                        |
   |-------+---------------------------+------------------------|
   | 64KB  |           Open            | 1 & 2, 3 & 4, 5 & 6, 7 |
   |       |                           |      & 8, 9 & 10       |
   |-------+---------------------------+------------------------|
   | 128KB |           Open            |          Open          |
   |-------+---------------------------+------------------------|
   | 256KB |           Open            |          Open          |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              CACHE SIZE CONFIGURATION (CON'T)              |
   |------------------------------------------------------------|
   | Size  |           JP29            |          JP30          |
   |-------+---------------------------+------------------------|
   | 32KB  |           Open            |          Open          |
   |-------+---------------------------+------------------------|
   | 64KB  |           Open            |          Open          |
   |-------+---------------------------+------------------------|
   | 128KB | 1 & 2, 3 & 4, 5 & 6, 7 &  |          Open          |
   |       |         8, 9 & 10         |                        |
   |-------+---------------------------+------------------------|
   | 256KB |           Open            | 1 & 2, 3 & 4, 5 & 6, 7 |
   |       |                           |      & 8, 9 & 10       |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+