ROBOTECH, INC.

GMB-386UN

Processor         80386DX
Processor Speed   33/40MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        254mm x 220mm
I/O Options       None
NPU Options       80387DX/3167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            JP1      Speaker                    JP18

  Turbo LED                  JP16      Reset switch               JP19

  Turbo switch               JP17      Power LED & keylock        JP20

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP2           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP2           pins 2 & 3
                                                              closed

  »   Monitor type select color               JP3             Closed

      Monitor type select monochrome          JP3              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) 4M x 9         NONE

      20MB        (4) 256K x 9    (4) 1M x 9

      20MB        (4) 1M x 9     (4) 256K 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 (WRITE BACK)

  Size    JP8     JP9      JP10   JP11    JP12    JP13     JP14    JP15

  32KB     2 &    Open     2 &     1 &    2 &     Open     2 &     Open
           3                3      2       3                3

  64KB     1 &   Closed    2 &     2 &    1 &     Open     2 &     Open
           2                3      3       2                3

  128KB    1 &   Closed    1 &     2 &    2 &    Closed    2 &     Open
          2, 3              2      3       3                3
          & 4

  256KB    1 &   Closed    2 &     2 &    2 &    Closed    1 &    Closed
          2, 4              3      3       3                2
          & 5

  Note: Pins designated should be in the closed position.

                CACHE JUMPER CONFIGURATION (WRITE THROUGH)

  Size    JP8     JP9      JP10   JP11    JP12    JP13     JP14    JP15

  32KB     2 &    Open     2 &     2 &    2 &     Open     2 &     Open
           3                3      3       3                3

  64KB     1 &   Closed    2 &     2 &    2 &     Open     2 &     Open
           2                3      3       3                3

  128KB    1 &   Closed    2 &     2 &    2 &    Closed    2 &     Open
          2, 3              3      3       3                3
          & 4

  256KB    1 &   Closed    2 &     2 &    2 &    Closed    2 &    Closed
          2, 4              3      3       3                3
          & 5

  Note: Pins designated should be in the closed position.

                   CPU SPEED CONFIGURATION

        Speed                JP7                  JP21

        33MHz          pins 1 & 2 closed   pins 1 & 2 closed

        40MHz          pins 2 & 3 closed   pins 1 & 2 closed

  MATH COPROCESSOR WAIT STATE CONFIGURATION

      Wait states                JP5

     0 wait states             Closed

     1 wait state               Open

                          A20 GATE CONFIGURATION

                Setting                                JP4

           Hardware emulate                           Open

       8042 keyboard controller                 pins 1 & 2 closed

           Cyrix CPU emulate                    pins 2 & 4 closed

   Keyboard controller controls Cyrix           pins 3 & 4 closed
                  CPU