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 DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       260mm x 220mm
I/O Options      32-bit VESA local bus slots (3)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  External battery            J4        Turbo switch              JP17

  Power LED & keylock         J5        Reset switch              JP18

  Speaker                     J6        32-bit VESA local      SL1 - SL3
                                        bus slots

  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               pins 1 & 2 closed
               chipset

  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 & 3
   installed                                       2 closed      closed

   PAL/GAL not    Closed     Closed     Closed     pins 2 &    pins 2 & 3
   installed                                       3 closed      closed