
ROBOTECH, INC.

GMB-486UNP

Processor  CX486S/SL80486SX/80486SX/AM486DX-PLUS/AM486DXL/CX486DX/
           SL80486DX/80486DX/AM486DX2-PLUS/AM486DXL2/CX486DX2/
           SL80486DX2/80486DX2/80486DX4/P24D/ Pentium Overdrive
Processor  20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       128MB
Onboard
DRAM
Cache      128/256/512KB
BIOS       Award
Dimensions 260mm x 220mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery           J1       Reset switch                 J6

  Turbo switch               J3       Power LED & keylock          J7

  Turbo LED                  J4       Green PC connector          JP27

  Speaker                    J5       32-bit VESA local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                 Function                      Jumper         Position

     CMOS memory normal operation              JP16         pins 2 & 3
                                                               closed

      CMOS memory clear                         JP16         pins 1 & 2
                                                               closed

     Monitor type select                       JP17            Open
      monochrome/EGA/VGA

      Monitor type select EGA                   JP17           Closed

     CPU clock delay select CLKIN delay        JP20         pins 2 & 3
      for CPUCLK                                               closed

      CPU clock delay select CLKIN and          JP20         pins 1 & 2
      CPUCLK same phase                                        closed

     Green PC break switch enabled             JP26            Open

      Green PC break switch disabled            JP26           Closed

     Factory configured - do not alter         JP32         pins 1 & 2
                                                               closed

     Factory configured - do not alter         JP35         pins 2 & 3
                                                               closed

     Keyboard controller clock select          JPX1            Open
      asynchronous

      Keyboard controller clock select          JPX1           Closed
      synchronous

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2          Bank 3

     1MB         (1) 256K x       NONE           NONE            NONE
                    36

     2MB         (1) 256K x     (1) 256K x       NONE            NONE
                    36             36

     2MB         (1) 512K x       NONE           NONE            NONE
                    36

     4MB         (1) 256K x     (1) 256K x     (1) 512K x        NONE
                    36             36             36

     4MB         (1) 512K x     (1) 512K x       NONE            NONE
                    36             36

     4MB        (1) 1M x 36       NONE           NONE            NONE

     5MB         (1) 256K x    (1) 1M x 36       NONE            NONE
                    36

     6MB         (1) 256K x     (1) 256K x    (1) 1M x 36        NONE
                    36             36

     6MB         (1) 512K x    (1) 1M x 36       NONE            NONE
                    36

     8MB         (1) 256K x     (1) 256K x     (1) 512K x    (1) 1M x 36
                    36             36             36

     8MB         (1) 512K x     (1) 512K x    (1) 1M x 36        NONE
                    36             36

     8MB        (1) 1M x 36    (1) 1M x 36       NONE            NONE

     8MB        (1) 2M x 36       NONE           NONE            NONE

     10MB        (1) 256K x     (1) 256K x    (1) 1M x 36    (1) 1M x 36
                    36             36

     12MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 1M x 36
                    36             36

     12MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     12MB       (1) 1M x 36    (1) 2M x 36       NONE            NONE

     16MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     16MB       (1) 2M x 36    (1) 2M x 36       NONE            NONE

     16MB       (1) 4M x 36       NONE           NONE            NONE

     16MB       (1) 1M x 36    (1) 1M x 36    (1) 2M x 36        NONE

     17MB        (1) 256K x    (1) 4M x 36       NONE            NONE
                    36

     18MB        (1) 256K x     (1) 256K x    (1) 4M x 36        NONE
                    36             36

     18MB        (1) 512K x    (1) 4M x 36       NONE            NONE
                    36

     20MB        (1) 512K x     (1) 512K x    (1) 4M x 36        NONE
                    36             36

     20MB       (1) 1M x 36    (1) 4M x 36       NONE            NONE

     20MB       (1) 1M x 36    (1) 2M x 36    (1) 2M x 36        NONE

     24MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 4M x 36
                    36             36

     24MB       (1) 1M x 36    (1) 1M x 36    (1) 4M x 36        NONE

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     24MB        (1) 2M x 36    (1) 2M x 36    (1) 2M x 36       NONE

     24MB        (1) 1M x 36    (1) 1M x 36    (1) 2M x 36   (1) 2M x 36

     24MB        (1) 2M x 36    (1) 4M x 36       NONE           NONE

     28MB        (1) 1M x 36    (1) 2M x 36    (1) 2M x 36   (1) 2M x 36

     32MB        (1) 4M x 36    (1) 4M x 36       NONE           NONE

     32MB        (1) 8M x 36       NONE           NONE           NONE

     32MB        (1) 2M x 36    (1) 2M x 36    (1) 4M x 36       NONE

     32MB        (1) 2M x 36    (1) 2M x 36    (1) 2M x 36   (1) 2M x 36

     36MB         (1) 512K x     (1) 512K x    (1) 4M x 36   (1) 4M x 36
                     36             36

     36MB        (1) 1M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     36MB        (1) 1M x 36    (1) 8M x 36       NONE           NONE

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 4M x 36   (1) 4M x 36

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36       NONE

     40MB        (1) 2M x 36    (1) 2M x 36    (1) 2M x 36   (1) 4M x 36

     48MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     48MB        (1) 4M x 36    (1) 8M x 36       NONE           NONE

     48MB        (1) 2M x 36    (1) 2M x 36    (1) 4M x 36   (1) 4M x 36

     48MB        (1) 2M x 36    (1) 2M x 36    (1) 8M x 36       NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36   (1) 4M x 36

     64MB        (1) 16M x 36      NONE           NONE           NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36       NONE

     64MB        (1) 8M x 36    (1) 8M x 36       NONE           NONE

     65MB         (1) 256K x    (1) 16M x 36      NONE           NONE
                     36

     68MB        (1) 1M x 36    (1) 16M x 36      NONE           NONE

     68MB        (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     72MB        (1) 1M x 36    (1) 1M x 36     (1) 16M x        NONE
                                                   36

     72MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36   (1) 8M x 36

     80MB        (1) 4M x 36    (1) 16M x 36      NONE           NONE

     80MB        (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     80MB        (1) 2M x 36    (1) 2M x 36    (1) 8M x 36   (1) 8M x 36

     96MB        (1) 4M x 36    (1) 4M x 36     (1) 16M x        NONE
                                                   36

     96MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36   (1) 8M x 36

     96MB        (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     128MB       (1) 16M x 36   (1) 16M x 36      NONE           NONE

     128MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

     128KB        (4) 32K x 8        NONE         (1) 8K x 8

     256KB        (4) 32K x 8     (4) 32K x 8    (1) 32K x 8

     256KB        (4) 64K x 8        NONE        (1) 32K x 8

     512KB       (4) 128K x 8        NONE        (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

     Size         JP1         JP2         JP3         JP4         JP33

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

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

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

    512KB        1 & 2       2 & 3      1 & 2, 3     2 & 3       2 & 3
                                          & 4

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

        Type            JP8       JP10      JP11       JP12       JP13

       CX486S          2 & 3     2 & 3      Open      2 & 3, 4    Open
                                                        & 5

      SL80486SX        2 & 3     2 & 3      Open       3 & 4      1 & 2

       80486SX         2 & 3     2 & 3      Open       Open       Open

    AM486DX-PLUS       1 & 2,    2 & 3      3 & 4      3 & 4      4 & 5
                       3 & 4

      AM486DXL         1 & 2,    2 & 3     1 & 2, 3    Open       Open
                       3 & 4                 & 4

       CX486DX         1 & 2,    2 & 3      3 & 4      2 & 3      Open
                       3 & 4

      SL80486DX        1 & 2,    2 & 3      3 & 4      3 & 4      1 & 2
                       3 & 4

       80486DX         1 & 2,    2 & 3      3 & 4      Open       Open
                       3 & 4

    AM486DX2-PLUS      1 & 2,    2 & 3      3 & 4      3 & 4      4 & 5
                       3 & 4

      AM486DXL2        1 & 2,    2 & 3     1 & 2, 3    Open       Open
                       3 & 4                 & 4

      CX486DX2         1 & 2,    2 & 3      3 & 4      2 & 3      Open
                       3 & 4

     SL80486DX2        1 & 2,    2 & 3      3 & 4      3 & 4      1 & 2
                       3 & 4

      80486DX2         1 & 2,    2 & 3      3 & 4      Open       Open
                       3 & 4

      80486DX4         1 & 2,    2 & 3      3 & 4      3 & 4      1 & 2
                       3 & 4

        P24D           1 & 2,    1 & 2      3 & 4     1 & 2, 3    2 & 3
                       3 & 4                            & 4

  Pentium Overdrive    1 & 2,    1 & 2      2 & 3      3 & 4      Open
                       3 & 4

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type            JP14      JP15       JP21       JP22       JP24

       CX486S          1 & 2,     2 & 3     1 & 2      2 & 3      2 & 3
                       3 & 4

      SL80486SX        2 & 3      4 & 5     2 & 3      1 & 2       Open

       80486SX          Open      Open      2 & 3      1 & 2       Open

    AM486DX-PLUS       2 & 3      4 & 5     1 & 2      1 & 2       Open

      AM486DXL          Open      Open      1 & 2      2 & 3      3 & 4

       CX486DX         1 & 2      2 & 3     1 & 2      2 & 3      2 & 3

      SL80486DX        2 & 3      4 & 5     2 & 3      1 & 2       Open

       80486DX          Open      Open      2 & 3      1 & 2       Open

    AM486DX2-PLUS      2 & 3      4 & 5     1 & 2      1 & 2       Open

      AM486DXL2         Open      Open      1 & 2      2 & 3      3 & 4

      CX486DX2         1 & 2      2 & 3     1 & 2      2 & 3      2 & 3

     SL80486DX2        2 & 3      4 & 5     2 & 3      1 & 2       Open

      80486DX2          Open      Open      2 & 3      1 & 2       Open

      80486DX4         2 & 3      4 & 5     2 & 3      1 & 2       Open

        P24D           2 & 3      4 & 5     1 & 2      1 & 2       Open

  Pentium Overdrive    2 & 3      1 & 2     1 & 2      1 & 2      1 & 2

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type          JP25       JP30       JP31      JP34        JP36

       CX486S         2 & 3      Open       Open      1 & 2      Closed

     SL80486SX        Open       Open       Open      1 & 2      Closed

      80486SX         Open       Open       Open      Open       Closed

    AM486DX-PLUS      1 & 2      Open       2 & 3     1 & 2      Closed

      AM486DXL        Open       Open       Open      2 & 3      Closed

      CX486DX         2 & 3      Open       Open      1 & 2      Closed

     SL80486DX        Open       Open       Open      1 & 2      Closed

      80486DX         Open       Open       Open      Open       Closed

   AM486DX2-PLUS      1 & 2      Open       2 & 3     1 & 2      Closed

     AM486DXL2        Open       Open       Open      2 & 3      Closed

      CX486DX2        2 & 3      Open       Open      1 & 2      Closed

     SL80486DX2       Open       Open       Open      1 & 2      Closed

      80486DX2        Open       Open       Open      Open       Closed

      80486DX4        3 & 4      Open       Open      1 & 2       Open

        P24D          1 & 2     Closed      1 & 2     1 & 2      Closed

       Pentium        1 & 2      Open       Open      1 & 2      Closed
     Overdrive

  Note: Pins designated should be in the closed position.

     CPU SPEED CONFIGURATION (AV9107)

   Speed      JP5        JP6        JP7

   20MHz     Closed      Open     Closed

   25MHz     Closed     Closed     Open

   33MHz      Open      Closed    Closed

   40MHz     Closed      Open      Open

  50iMHz     Closed     Closed     Open

   50MHz      Open       Open     Closed

  66iMHz      Open      Closed    Closed

  75iMHz     Closed     Closed     Open

  100iMHz     Open      Closed    Closed

     CPU SPEED CONFIGURATION (MX-8315)

   Speed      JP5        JP6        JP7

   20MHz      Open       Open      Open

   25MHz      Open      Closed     Open

   33MHz     Closed     Closed    Closed

   40MHz      Open      Closed    Closed

  50iMHz      Open      Closed     Open

   50MHz     Closed      Open      Open

  66iMHz     Closed     Closed    Closed

  75iMHz      Open      Closed     Open

  100iMHz    Closed     Closed    Closed

      VESA WAIT STATE CONFIGURATION

     Wait states             JP28

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

         BUS SPEED CONFIGURATION

      CPU speed              JP29

      <= 33MHz        pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

