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

   COBRA-RT VER. A

 Processor  CX486S/80486SX/CX487S/80487SX/80486DX/ODP486SX/80486DX2/ 
            80486DX4/Pentium Overdrive                               
 Processor  25/33/40/50(internal)/50/66(internal)MHz                 
 Speed      
 Chip Set   SIS                                                      
 Max.       64MB                                                     
 Onboard    
 DRAM       
 Cache      32/64/128/256KB                                          
 BIOS       AMI                                                      
 Dimensions 254mm x 220mm                                            
 I/O        32-bit VESA local bus slots (3)                          
 Options    
 NPU        None                                                     
 Options    

<gopher://bitreich.org/I/th99/m/P-R/32176-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | External battery  |   JP8    | Reset switch     |  JP15D   |
   |-------------------+----------+------------------+----------|
   | Speaker           |  JP15A   | Turbo switch     |  JP15E   |
   |-------------------+----------+------------------+----------|
   | Power LED &       |  JP15B   | +5vDC ground     |  JP15F   |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |  JP15C   | 32-bit VESA      |  SL1 -   |
   |                   |          | local bus slots  |   SL3    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP8   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP8   | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP11  | pins 1 & 2 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP11  | pins 2 & 3 |
   |   | board                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CPU type select 1 CPU on board   |  JP12  | pins 1 & 2 |
   |   | (PQFP or PGA)                    |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CPU type select 2 CPU on board   |  JP12  | pins 2 & 3 |
   |   | (PGA enabled PQFP disabled)      |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Green PC mode enabled            |  JP14  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Green PC mode disabled           |  JP14  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | VESA bus address type select     |  JP19  | pins 1 & 2 |
   |   | asynchronous (40/50mhz CPU)      |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | VESA bus address type select     |  JP19  | pins 2 & 3 |
   |   | synchronous                      |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | VESA bus data type select        |  JP20  | pins 1 & 2 |
   |   | synchronous                      |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | VESA bus data type select        |  JP20  | pins 2 & 3 |
   |   | asynchronous                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | VGA card select normal           |  JP28  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | VGA card select Weitek Power     |  JP28  | pins 2 & 3 |
   |   | 9000 VGA only                    |        |   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        |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 16M x 9     |        NONE        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    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) 16K x 8  |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |   JP5    |   JP6   |   JP7   |   JP9   |  JP10  |
   |----------+----------+---------+---------+---------+--------|
   |   32KB   |  2 & 3   |  Open   |  Open   |  Open   |  Open  |
   |----------+----------+---------+---------+---------+--------|
   |   64KB   |  1 & 2   |  Open   |  Open   | Closed  |  Open  |
   |----------+----------+---------+---------+---------+--------|
   |  128KB   |  2 & 3   |  2 & 3  | Closed  | Closed  |  Open  |
   |----------+----------+---------+---------+---------+--------|
   |  256KB   |  1 & 2   |  1 & 2  | Closed  | Closed  | 2 & 3  |
   |----------+----------+---------+---------+---------+--------|
   |  256KB   |  1 & 2   |  1 & 2  | Closed  | Closed  | 1 & 2  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |       Type        |       JP16        |        JP17        |
   |-------------------+-------------------+--------------------|
   |      CX486S       |       Open        | pins 2 & 3 closed  |
   |-------------------+-------------------+--------------------|
   |      80486SX      |       Open        | pins 2 & 3 closed  |
   |-------------------+-------------------+--------------------|
   |      80487SX      | pins 2 & 3 closed | pins 1 & 2, 3 & 4  |
   |                   |                   |       closed       |
   |-------------------+-------------------+--------------------|
   |     ODP486SX      | pins 2 & 3 closed | pins 1 & 2, 3 & 4  |
   |                   |                   |       closed       |
   |-------------------+-------------------+--------------------|
   |  80486DX/DX2/DX4  | pins 1 & 2 closed | pins 1 & 2, 3 & 4  |
   |                   |                   |       closed       |
   |-------------------+-------------------+--------------------|
   | Pentium Overdrive | pins 1 & 2 closed | pins 1 & 2, 3 & 4  |
   |                   |                   |       closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Speed    |   JP21    |   JP22    |   JP23    |   JP27    |
   |------------+-----------+-----------+-----------+-----------|
   |   25MHz    |  Closed   |   Open    |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |   33MHz    |  Closed   |  Closed   |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |   40MHz    |   Open    |   Open    |  Closed   |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |   50iMHz   |  Closed   |   Open    |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |   50MHz    |   Open    |  Closed   |   Open    |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |   66iMHz   |  Closed   |  Closed   |   Open    |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                VESA BUS CLOCK CONFIGURATION                |
   |------------------------------------------------------------|
   |   Setting    |   JP25 (SL2)    | JP26 (SL1)  | JP29 (SL3)  |
   |--------------+-----------------+-------------+-------------|
   | Synchronous  |   pins 1 & 2    | pins 1 & 2  | pins 1 & 2  |
   |              |     closed      |   closed    |   closed    |
   |--------------+-----------------+-------------+-------------|
   | Asynchronous |   pins 2 & 3    | pins 2 & 3  | pins 2 & 3  |
   |              |     closed      |   closed    |   closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |      CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AB)       |
   |------------------------------------------------------------|
   |    CPU speed     |        JP19        |        JP20        |
   |------------------+--------------------+--------------------|
   |      25MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      33MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      40MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      50iMHz      | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      50MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      66iMHz      | pins 2 & 3 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |      CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AC)       |
   |------------------------------------------------------------|
   |    CPU speed     |        JP19        |        JP20        |
   |------------------+--------------------+--------------------|
   |      25MHz       | pins 2 & 3 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 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      50MHz       | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      66iMHz      | pins 2 & 3 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+