
JOINDATA SYSTEMS, INC.

G486U/G486USX


Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          UMC
Max. Onboard DRAM 64MB
Cache             64/128/256KB
BIOS              AMI/MR
Dimensions        215mm x 330mm
I/O Options       None
NPU Options       4167


[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Reset switch                J9       Speaker                     J12

  Turbo switch               J11       Power LED & keylock         J13

  Turbo LED                  J10       External battery            J14

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Monitor type select color                JP15           Closed

      Monitor type select monochrome           JP15            Open

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9      NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9      NONE           NONE

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      NONE

     4MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9  (4) 256K x 9

     4MB        (4) 1M x 9        NONE           NONE           NONE

     5MB        (4) 256K x 9   (4) 1 M x 9       NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1 M x 9       NONE

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9   (4) 1M x 9     (4) 1M x 9        NONE

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        NONE

     16MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 4M x 9        NONE           NONE           NONE

     20MB       (4) 1M x 9     (4) 4M x 9        NONE           NONE

     24MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9        NONE

     32MB       (4) 4M x 9     (4) 4M x 9        NONE           NONE

     36MB       (4) 1M x 9     (4) 4M x 9     (4) 4M x 9        NONE

     40MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9     (4) 4M x 9

     48MB       (4) 4M x 9     (4) 4M x 9     (4) 4M x 9        NONE

     64MB       (4) 4M x 9     (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

                     CACHE CONFIGURATION

  Size        Bank 0            Bank 1             Tag

  64KB      (4) 8K x 8        (4) 8K x 8       (3) 16K x 4

  128KB     (4) 32K x 8          NONE          (3) 16K x 4

  256KB     (4) 32K x 8       (4) 32K x 8      (3) 16K x 4

                 CACHE JUMPER CONFIGURATION

   Size       W14       W15       W16       W17       W18

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

  128KB      2 & 3     1 & 2     1 & 2     2 & 3     2 & 3

  256KB      1 & 2     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

    Type          W5         W10         W11         W12          W13

   80486SX      Closed      Open         Open        Open      pins 1 & 2
                                                                closed

   80487SX       Open      Closed     pins 2 & 3    Closed     pins 2 & 3
                                        closed                  closed

   80486DX       Open      Closed     pins 1 & 2    Closed     pins 2 & 3
                                        closed                  closed

