JOINDATA SYSTEMS, INC.

G486ULB

Processor             80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed       20/25/33/50(internal)/50/66(internal)MHz
Chip Set              EFAR
Max. Onboard DRAM     32MB
Cache                 64/128/256KB
BIOS                  AMI
Dimensions            330mm x 218mm
I/O Options           32-bit local bus card slots (2)
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Reset switch              J9         Power LED & keylock       J13

  Turbo LED                J10         External battery          J14

  Turbo switch             J11         32-bit local bus       S15 & S16
                                       card slots

  Speaker                  J12

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   Factory configured - do not             J18             Closed
      alter

  »   Factory configured - do not             W10              N/A
      alter

  »   Monitor type select color              JP15           pins 1 & 2
                                                              closed

      Monitor type select monochrome         JP15           pins 2 & 3
                                                              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

     32MB        (4) 4M x 9      (4) 4M x 9

                            CACHE CONFIGURATION

    Size      Bank 0     Bank 1     TAG (U38,    TAG (U40)    Dirty(U48)
                                      U39)

    64KB      (4) 8K x   (4) 8K x   (2) 16K x      NONE      (1) 16K x 4
                 8          8           4

    64KB      (4) 8K x   (4) 8K x     NONE        (1) 8K x   (1) 16K x 4
                 8          8                        8

   128KB      (4) 32K     NONE      (2) 16K x      NONE      (1) 16K x 4
                x 8                     4

   128KB      (4) 32K     NONE        NONE        (1) 8K x   (1) 16K x 4
                x 8                                  8

   256KB      (4) 32K    (4) 32K    (2) 16K x      NONE      (1) 16K x 4
                x 8        x 8          4

   256KB      (4) 32K    (4) 32K      NONE       (1) 32K x   (1) 16K x 4
                x 8        x 8                       8

                 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           OSC1          W11            W12           W13

    80486SX-20        20MHz         Open          Open        pins 1 & 2
                                                                closed

    80486SX-25        25MHz         Open          Open        pins 1 & 2
                                                                closed

    80486DX-25        25MHz      pins 1 & 2     pins 1 & 2    pins 2 & 3
                                   closed        closed         closed

    80486DX-33        33MHz      pins 1 & 2     pins 1 & 2    pins 2 & 3
                                   closed        closed         closed

    80486DX-50        50MHz      pins 1 & 2     pins 1 & 2    pins 2 & 3
                                   closed        closed         closed

   80486DX2-50        25MHz      pins 1 & 2     pins 1 & 2    pins 2 & 3
                                   closed        closed         closed

   80486DX2-66        33MHz      pins 1 & 2     pins 1 & 2    pins 2 & 3
                                   closed        closed         closed