JOINDATA SYSTEMS, INC.

G386SX/20

Processor         80386SX
Processor Speed   16/20MHz
Chip Set          Intel
Max. Onboard DRAM 16MB
SRAM Cache        None
BIOS              AMI
Dimensions        330.2mm x 218.4mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                Location       Purpose               Location

  External battery     J2/pins 1 & 4    Turbo switch            J20

  Internal battery     J2/pins 2 & 4    Turbo LED               J21

  Power LED &               J18         Reset switch            J22
  keylock

  Speaker                   J19

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             J2         pins 3 & 4 open

      CMOS memory clear                        J2            pins 3 & 4
                                                              closed

  »   Monitor type select color                JP1            closed

      Monitor type select monochrome           JP1             open

  »   NPU disabled                             JP4           pins 2 & 3
                                                              closed

      NPU enabled                              JP4           pins 1 & 2
                                                              closed

  Note:J2/pin 4 is also used as ground for internal and external battery.

                            DRAM CONFIGURATION

  Size     SIMM    Location      DIP     Location     Parity    Location

  512KB     (2)     Bank 0      NONE       NONE        NONE       NONE
          256K x
            9

  1MB       (4)    Banks 0 &    NONE       NONE        NONE       NONE
          256K x      1
            9

  1.5MB     (4)    Banks 0 &     (4)      Bank 4        (2)        P-4
          256K x      1         44256                 41256
            9

  2MB       (4)    Banks 0 &     (8)     Banks 4 &      (4)     P-4 & P-5
          256K x      1         44256        5        41256
            9

  2MB     (2) 1M    Bank 0      NONE       NONE        NONE       NONE
           x 9

  2.5MB     (2)     Bank 0      NONE       NONE        NONE       NONE
          256K x
            9       Bank 1

          (2) 1M
           x 9

  3MB       (4)    Banks 0 &     (16)     Bank 2        (2)        P-2
          256K x      1        411000                 411000
            9

  4MB     (4) 1M   Banks 0 &    NONE       NONE        NONE       NONE
           x 9        1

  4.5MB   (4) 1M   Banks 0 &     (4)      Bank 4        (2)        P-4
           x 9        1         44256                 41256

  5MB       (4)    Banks 0 &     (32)    Banks 2 &      (4)     P-2 & P-3
          256K x      1        411000        3        411000
            9

  6MB     (4) 1M   Banks 0 &     (16)     Bank 2        (2)        P-2
           x 9        1        411000                 411000

  8MB     (4) 1M   Banks 0 &     (32)    Banks 2 &      (4)     P-2 & P-3
           x 9        1        411000        3        411000

  8MB     (2) 4M    Bank 0      NONE       NONE        NONE       NONE
           x 9

  8.5MB     (2)     Bank 0      NONE       NONE        NONE       NONE
          256K x
            9       Bank 1

          (2) 4M
           x 9

  9MB       (2)     Bank 0       (4)      Bank 4        (2)        P-4
          256K x                44256                 41256
            9       Bank 1

          (2) 4M
           x 9

  10MB    (2) 1M    Bank 0      NONE       NONE        NONE       NONE
           x 9
                    Bank 1
          (2) 4M
           x 9

  12MB    (2) 1M    Bank 0       (16)     Bank 2        (2)        P-2
           x 9                 411000                 411000
                    Bank 1
          (2) 4M
           x 9

  16MB    (4) 4M    Bank 0      NONE       NONE        NONE       NONE
           x 9