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

   GMB-486UNL

   Processor         80486SX/80487SX/80486DX/80486DX2             
   Processor Speed   25/33/40/50(internal)/50/66(internal)MHz     
   Chip Set          Toshiba                                      
   Max. Onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        260mm x 220mm                                
   I/O Options       32-bit VESA local bus slots (3)              
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/P-R/32170-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | External battery  |    J4    | Turbo switch     |   JP17   |
   |-------------------+----------+------------------+----------|
   | Power LED &       |    J5    | Reset switch     |   JP18   |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |    J6    | 32-bit VESA      |  SL1 -   |
   |                   |          | local bus slots  |   SL3    |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |   JP16   |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | Monitor type select color      |  JP1   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |  JP1   |     Open     |
   |---+--------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  JP2   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  JP2   |  pins 1 & 2  |
   |   |                                |        |    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     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M 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  |  JP6   |  JP7   |  JP9   |          JP11           |
   |-------+--------+--------+--------+-------------------------|
   | 32KB  |  Open  |  Open  |  Open  |    pins 2 & 3 closed    |
   |-------+--------+--------+--------+-------------------------|
   | 64KB  |  Open  | Closed |  Open  |    pins 1 & 2 closed    |
   |-------+--------+--------+--------+-------------------------|
   | 128KB |  Open  | Closed | Closed |    pins 1 & 2, 3 & 4    |
   |       |        |        |        |         closed          |
   |-------+--------+--------+--------+-------------------------|
   | 256KB | Closed | Closed | Closed |    pins 1 & 2, 4 & 5    |
   |       |        |        |        |         closed          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |           Type           |               JP4               |
   |--------------------------+---------------------------------|
   |         80486SX          |        pins 5 & 6 closed        |
   |--------------------------+---------------------------------|
   |         80487SX          | pins 2 & 3, 4 & 5, 6 & 7 closed |
   |--------------------------+---------------------------------|
   |       80486DX/DX2        | pins 1 & 2, 4 & 5, 6 & 7 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |     Speed     |     JP29     |     JP30     |     JP31     |
   |---------------+--------------+--------------+--------------|
   |     25MHz     |    Closed    |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     33MHz     |    Closed    |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   |     40MHz     |     Open     |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |    50iMHz     |    Closed    |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |     50MHz     |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   |    66iMHz     |    Closed    |    Closed    |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               VESA CLOCK SPEED CONFIGURATION               |
   |------------------------------------------------------------|
   |              CPU speed              |         JP43         |
   |-------------------------------------+----------------------|
   |          Same phase as CPU          |  pins 2 & 3 closed   |
   |-------------------------------------+----------------------|
   | Same phase as Toshiba U4800 chipset |  pins 1 & 2 closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BUS SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |           CPU speed           |            JP19            |
   |-------------------------------+----------------------------|
   |            <=33MHz            |            Open            |
   |-------------------------------+----------------------------|
   |            >33MHz             |           Closed           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               VESA WAIT STATE CONFIGURATION                |
   |------------------------------------------------------------|
   |          Wait states          |            JP20            |
   |-------------------------------+----------------------------|
   |         0 wait states         |            Open            |
   |-------------------------------+----------------------------|
   |         1 wait state          |           Closed           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              VESA MASTER/SLAVE CONFIGURATION               |
   |------------------------------------------------------------|
   |   Setting   |  JP40  |  JP41  |  JP42  |  JP44   |  JP45   |
   |-------------+--------+--------+--------+---------+---------|
   |   PAL/GAL   |  Open  |  Open  |  Open  | pins 1  | pins 2  |
   |  installed  |        |        |        |   & 2   |   & 3   |
   |             |        |        |        | closed  | closed  |
   |-------------+--------+--------+--------+---------+---------|
   | PAL/GAL not | Closed | Closed | Closed | pins 2  | pins 2  |
   |  installed  |        |        |        |   & 3   |   & 3   |
   |             |        |        |        | closed  | closed  |
   +------------------------------------------------------------+