
MICRONICS COMPUTERS, INC.

JX30G VL-BUS

Processor         80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Micronics
Max. Onboard DRAM 64MB
Cache             64/128/256KB
BIOS              Phoenix
Dimensions        330mm x 218mm
I/O Options       32-bit VESA local bus slots (2), floppy drive interface,

                  IDE interface, parallel port, PS/2 mouse port, serial
                  ports (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                Location

  IDE interface               CN2       Speaker                  J30

  Floppy drive                CN3       Power LED &              J31
  interface                             keylock

  External battery            J8        32-bit VESA Local         S1
                                        bus slot

  Serial port 2               J9        32-bit VESA Local         S2
                                        bus slot

  External keyboard/PS2       J10       Turbo LED                W18
  style mouse

  Serial port 1               J14       Reset switch             W20

  Parallel port               J16       IDE interface LED        W21

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

     Factory configured - do not        SW1/switch 3           Off
      alter

     Factory configured - do not        SW1/switch 4           Off
      alter

     Monitor type select color               W2               Closed

      Monitor type select monochrome          W2                Open

     PS/2 mouse enabled                      W3               Closed

      PS/2 mouse disabled                     W3                Open

     Parity enabled                          W4               Closed

      Parity disabled                         W4                Open

     Factory configured - do not             W6                Open
      alter

     Parallel port unidirectional            W7             pins 1 & 2
      (for printer)                                            closed

      Parallel port bi-directional            W7             pins 2 & 3
                                                               closed

     CMOS memory normal operation            W8             pins 2 & 3
                                                               closed

      CMOS memory clear                       W8             pins 1 & 2
                                                               closed

     Factory configured - do not             W9                Open
      alter

     Factory configured - do not             W25               N/A
      alter

     Factory configured - do not             W26               N/A
      alter

                         REAL TIME CLOCK SETTINGS

              Settings                       W1                 W5

   DALLAS Real Time Clock enabled          Closed              N/A

   MOTOROLA 146818 Real Time Clock          Open               N/A
               enabled

    DALLAS Real Time Clock clear            N/A               Closed

  Real time clock normal operation          N/A                Open

                            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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

                            CACHE CONFIGURATION

     Size        Bank 0        Bank 1        TAG/U34          TAG/U61

     64KB       (4) 8K x 8   (4) 8K x 8     (1) 8K x 8       (1) 8K x 8

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

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

  Note:If Write-Through caching is not being used, the chip at U61 is not
  installed.

                 CACHE JUMPER CONFIGURATION

   Size      W10        W11       W22       W23      W24

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

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

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

  Note:Pins designated should be in the closed position.

                       CACHING METHOD CONFIGURATION

     Method           Size               W16                  W17

  Write-Through        All              Open                  Open

   Write-Back         64KB        pins 1 & 2 closed    pins 1 & 2 closed

   Write-Back         128KB       pins 1 & 2 closed    pins 2 & 3 closed

   Write-Back         256KB       pins 2 & 3 closed    pins 2 & 3 closed

          CPU TYPE CONFIGURATION

        Type                  W12

       80486SX         pins 1 & 2 closed

       80486DX         pins 2 & 3 closed

      804896DX2        pins 2 & 3 closed

  Pentium Overdrive    pins 2 & 3 closed

          CPU PQFP CONFIGURATION

        PQFP                 W13

       Enabled        pins 1 & 2 closed

      Disabled        pins 2 & 3 closed

            CPU SPEED CONFIGURATION

     Speed        SW1/switch 1   SW1/switch 2

     25MHz            Off             On

     33MHz            On              On

    50i MHz           Off             On

    66i MHz           On              On

