AT & T
======

   AT & T GLOBALYST 510

   AT & T GLOBALYST 515

   Processor     SL80486SX/SL80486SX2/SL80486DX2/SL80486DX4/P24T/ 
                 486Overdrive                                     
   Processor     25/33/50(internal)/66(internal)100(internal)MHz  
   Speed         
   Chip Set      Unidentified                                     
   Video Chip    Cirrus Logic                                     
   Set           
   Maximum       64MB                                             
   Onboard       
   Memory        
   Maximum Video 1MB                                              
   Memory        
   Cache         256KB                                            
   BIOS          IBM                                              
   Dimensions    330mm x 218mm                                    
   I/O Options   Floppy drive interface, IDE interface, parallel  
                 port, PS/2 mouse port, serial ports (2), VGA     
                 graphics pass through connector, VGA port, riser 
                 slot, cache slot                                 
   NPU Options   None                                             

<gopher://bitreich.org/I/th99/m/A-B/33461-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location | Purpose            | Location |
   |-----------------+----------+--------------------+----------|
   | PS/2 mouse port |   CN1    | Floppy drive       |   J10    |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port 1   |   CN2    | VGA graphics       |   J14    |
   |                 |          | pass-through       |          |
   |                 |          | connector          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port 2   |   CN3    | Front panel LEDS   |   J15    |
   |-----------------+----------+--------------------+----------|
   | Parallel port   |   CN4    | Speaker            |   J16    |
   |-----------------+----------+--------------------+----------|
   | VGA port        |   CN5    | Riser slot         |   SL1    |
   |-----------------+----------+--------------------+----------|
   | IDE interface   |    J8    | Cache slot         |   SL2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |  Label  |   Position   |
   |-----------------------------------+---------+--------------|
   |>>  | CMOS memory normal operation |   J1    |  Pins 2 & 3  |
   |    |                              |         |    closed    |
   |----+------------------------------+---------+--------------|
   |    | CMOS memory clear            |   J1    |  Pins 1 & 2  |
   |    |                              |         |    closed    |
   |----+------------------------------+---------+--------------|
   |    | Jumper information           |   J3V   | Unidentified |
   |    | unavailable                  |         |              |
   |----+------------------------------+---------+--------------|
   |    | On board video enabled       |  SW1/1  |      On      |
   |----+------------------------------+---------+--------------|
   |    | On board video disabled      |  SW1/1  |     Off      |
   |----+------------------------------+---------+--------------|
   |>>  | Monitor type select color    |  SW1/2  |      On      |
   |----+------------------------------+---------+--------------|
   |    | Monitor type select          |  SW1/2  |     Off      |
   |    | monochrome                   |         |              |
   |------------------------------------------------------------|
   | Note: If a VGA processor is enabled, SW1/2 has no          |
   | function. If the VGA controller is disabled, and a CGA or  |
   | MDA controller is installed, set the switch to the above   |
   | setting.                                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    4MB     |  (1) 1M x 36  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |    8MB     |  (1) 1M x 36  |  (1) 1M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |    12MB    |  (1) 1M x 36  |  (1) 1M x 36  |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    16MB    |  (1) 4M x 36  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |    20MB    |  (1) 1M x 36  |  (1) 4M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |    20MB    |  (1) 4M x 36  |  (1) 1M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (1) 1M x 36  |  (1) 4M x 36  |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (1) 1M x 36  |  (1) 1M x 36  |  (1) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (1) 4M x 36  |  (1) 1M x 36  |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (1) 4M x 36  |  (1) 4M x 36  |     None      |
   |------------+---------------+---------------+---------------|
   |    36MB    |  (1) 4M x 36  |  (1) 4M x 36  |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    36MB    |  (1) 1M x 36  |  (1) 4M x 36  |  (1) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    36MB    |  (1) 4M x 36  |  (1) 1M x 36  |  (1) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    40MB    |  (1) 1M x 36  |  (1) 1M x 36  |  (1) 8M x 36  |
   |------------+---------------+---------------+---------------|
   |    48MB    |  (1) 4M x 36  |  (1) 4M x 36  |  (1) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    52MB    |  (1) 1M x 36  |  (1) 4M x 36  |  (1) 8M x 36  |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (1) 4M x 36  |  (1) 4M x 36  |  (1) 8M x 36  |
   |------------------------------------------------------------|
   | Note: The location of banks 0, 1, & 2 are unidentified.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |              SL2              |
   |----------------------------+-------------------------------|
   |            None            |         Not installed         |
   |----------------------------+-------------------------------|
   |           256KB            |    256KB module installed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VIDEO MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   |        Size        |      Bank 0       |      Bank 1       |
   |--------------------+-------------------+-------------------|
   |       512KB        |       512KB       |       None        |
   |--------------------+-------------------+-------------------|
   |        1MB         |       512KB       |       512KB       |
   |------------------------------------------------------------|
   | Note: Bank 0 is factory installed and is not configurable. |
   | The size of the upgrade ships are unidentified.            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |           Speed            |              JK1              |
   |----------------------------+-------------------------------|
   |           25MHz            |   Pins 1 & 2, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |           33MHz            |   Pins 3 & 4, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |           50iMHz           |   Pins 1 & 2, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |           66iMHz           |   Pins 3 & 4, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |          100iMHz           |   Pins 3 & 4, 5 & 6 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |     Type     |     JC1      |    JC2     |  JC3   |  JC4   |
   |--------------+--------------+------------+--------+--------|
   |  SL80486SX   |  Pins 2 & 3  | Pins 2 & 3 | Closed | Closed |
   |              |    closed    |   closed   |        |        |
   |--------------+--------------+------------+--------+--------|
   |  SL80486DX   |  Pins 1 & 2  | Pins 1 & 2 |  Open  |  Open  |
   |              |    closed    |   closed   |        |        |
   |--------------+--------------+------------+--------+--------|
   |  SL80486DX2  |  Pins 1 & 2  | Pins 1 & 2 |  Open  |  Open  |
   |              |    closed    |   closed   |        |        |
   |--------------+--------------+------------+--------+--------|
   |  SL80486DX4  |  Pins 1 & 2  | Pins 1 & 2 |  Open  |  Open  |
   |              |    closed    |   closed   |        |        |
   |--------------+--------------+------------+--------+--------|
   | 486Overdrive |  Pins 1 & 2  | Pins 1 & 2 |  Open  |  Open  |
   |              |    closed    |   closed   |        |        |
   +------------------------------------------------------------+