GIGA-BYTE TECHNOLOGY CO., INC.
==============================

   GA-586AT

   Processor    Pentium                                           
   Processor    75/90/100MHz                                      
   Speed        
   Chip Set     UMC                                               
   Max. Onboard 128MB                                             
   DRAM         
   Cache        256/512KB                                         
   BIOS         Award                                             
   Dimensions   280mm x 220mm                                     
   I/O Options  32-bit PCI slots (3), floppy drive interface,     
                green PC connector, IDE interfaces (2), parallel  
                port, serial ports (2)                            
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/E-H/32759-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose              | Location | Purpose       | Location |
   |----------------------+----------+---------------+----------|
   | Serial port 1        |   CN1    | Green PC LED  |    J5    |
   |----------------------+----------+---------------+----------|
   | Serial port 2        |   CN2    | Reset switch  |    J6    |
   |----------------------+----------+---------------+----------|
   | Floppy drive         |   CN3    | Turbo switch  |    J7    |
   | interface            |          |               |          |
   |----------------------+----------+---------------+----------|
   | Parallel port        |   CN4    | Turbo LED     |    J8    |
   |----------------------+----------+---------------+----------|
   | Chassis fan power    |    J1    | Speaker       |    J9    |
   |----------------------+----------+---------------+----------|
   | IDE interface        |    J2    | Power LED &   |   J10    |
   | (primary)            |          | keylock       |          |
   |----------------------+----------+---------------+----------|
   | IDE interface        |    J3    | 32-bit PCI    |  PC1 -   |
   | (secondary)          |          | slots         |   PC3    |
   |----------------------+----------+---------------+----------|
   | Green PC connector   |    J4    |               |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Jumper | Position |
   |----------------------------------------+--------+----------|
   |>> | CPU type select VR or standard CPU |  JP2   |   Open   |
   |---+------------------------------------+--------+----------|
   |   | CPU type select VRE CPU            |  JP2   |  Closed  |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  |  JP12  |   N/A    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    2MB     | (2) 256K x 36 |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    4MB     | (2) 256K x 36 | (2) 256K x 36 |     NONE      |
   |------------+---------------+---------------+---------------|
   |    4MB     | (2) 512K x 36 |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    6MB     | (2) 256K x 36 | (2) 256K x 36 | (2) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    6MB     | (2) 512K x 36 | (2) 256K x 36 |     NONE      |
   |------------+---------------+---------------+---------------|
   |    8MB     | (2) 512K x 36 | (2) 256K x 36 | (2) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    8MB     |  (2) 1M x 36  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    10MB    | (2) 256K x 36 |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    10MB    |  (2) 1M x 36  | (2) 256K x 36 |     NONE      |
   |------------+---------------+---------------+---------------|
   |    12MB    | (2) 512K x 36 |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    12MB    |  (2) 1M x 36  | (2) 256K x 36 | (2) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    16MB    |  (2) 1M x 36  |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    16MB    |  (2) 2M x 36  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    18MB    | (2) 256K x 36 |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    18MB    |  (2) 2M x 36  | (2) 256K x 36 |     NONE      |
   |------------+---------------+---------------+---------------|
   |    20MB    | (2) 512K x 36 |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    20MB    |  (2) 2M x 36  | (2) 256K x 36 | (2) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (2) 1M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (2) 2M x 36  |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 2M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 4M x 36  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    34MB    | (2) 256K x 36 |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    34MB    |  (2) 4M x 36  | (2) 256K x 36 |     NONE      |
   |------------+---------------+---------------+---------------|
   |    36MB    | (2) 512K x 36 |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    36MB    |  (2) 4M x 36  | (2) 256K x 36 | (2) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    40MB    |  (2) 1M x 36  |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    40MB    |  (2) 4M x 36  |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    48MB    |  (2) 2M x 36  |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    48MB    |  (2) 4M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (2) 4M x 36  |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (2) 8M x 36  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    66MB    | (2) 256K x 36 |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    66MB    |  (2) 8M x 36  | (2) 256K x 36 |     NONE      |
   |------------+---------------+---------------+---------------|
   |    68MB    | (2) 512K x 36 |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    68MB    |  (2) 8M x 36  | (2) 256K x 36 | (2) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    72MB    |  (2) 1M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    72MB    |  (2) 8M x 36  |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    80MB    |  (2) 2M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM CONFIGURATION (CON'T)                 |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    80MB    |  (2) 8M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    96MB    |  (2) 4M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    96MB    |  (2) 8M x 36  |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |   112MB    |  (2) 8M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |   128MB    |  (2) 8M x 36  |     NONE      |  (2) 8M x 36  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |      Bank 0      |            TAG             |
   |------------+------------------+----------------------------|
   |   256KB    |   (8) 32K x 8    | (1) 8K x 8 or (1) 32K x 8  |
   |------------+------------------+----------------------------|
   |   512KB    |   (8) 64K x 8    | (1) 16K x 8 or (1) 32K x 8 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |            Size            |              JP3              |
   |----------------------------+-------------------------------|
   |           256KB            |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |           512KB            |       pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |      Speed       |        JP4         |        JP5         |
   |------------------+--------------------+--------------------|
   |      75MHz       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      90MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      100MHz      | pins 1 & 2 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+