
JOINDATA SYSTEMS, INC.

G386U

Processor         80386DX
Processor Speed   33/40MHz
Chip Set          UMC
Max. onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387DX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Reset switch                J9       Speaker                     J12

  Turbo LED                  J10       Power LED & keylock         J13

  Turbo switch               J11       External battery            J14

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     Factory configured - do not            J1               Unknown
      alter

     Factory configured - do not            J2               Unknown
      alter

     NPU enabled                         W1 & W10             Closed

      NPU disabled                        W1 & W10              Open

     Monitor type select color              W11               Closed

      Monitor type select                    W11                Open
      monochrome

     CMOS memory normal operation           W9                Closed
      (Internal Battery)

      CMOS memory normal operation           W9                 Open
      (External Battery)

              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          U21, U22, U23,     U15, U16, U17,         TAG
                         & U24              & U18

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

       64KB            (4) 8K x 8        (4) 8K x 8        (2) 16K x 4

       128KB          (4) 32K x 8           NONE           (2) 64K x 4

       256KB          (4) 32K x 8        (4) 32K x 8       (2) 64K x 4

  Note:U21 - U24 and U15 - U18 may be located on the system board.

                        CACHE JUMPER CONFIGURATION

    Size          W3          W4          W5          W6           W7

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

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

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

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

  Note:Pins designated should be in the closed position.

                          NPU CLOCK CONFIGURATION

         Mode                OSC2                W8              W9

     Synchronous         Not installed       pins 1 & 2         Open
                                               closed

  Asynchronous 25MHz         50MHz           pins 2 & 3        Closed
                                               closed

  Asynchronous 33HMz         66MHz           pins 2 & 3        Closed
                                               closed

