MICRONICS COMPUTERS, INC.

JX30G

Processor         80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Unidentified
Max. Onboard DRAM 64MB
Cache             64/128/256KB
BIOS              AMI
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

  PS/2 mouse port            CN1       Speaker                    J30

  Floppy drive               CN2       Power LED & keylock        J31
  interface

  IDE interface              CN3       Turbo LED                  W18

  External battery            J8       Turbo switch               W19

  Serial port 2               J9       Reset switch               W20

  Internal keyboard          J13       IDE interface LED          W21
  connector

  Serial port 1              J14       32-bit VESA Local bus   SL1 & SL2
                                       slots

  Parallel port              J16

                        USER CONFIGURABLE SETTINGS

                  Function                     Jumper         Position

  »   Clock type select Motorola 126818          W1             Open

      Clock type select Dallas                   W1            Closed

  »   Monitor type select color                  W2            Closed

      Monitor type select monochrome             W2             Open

  »   On board mouse disabled (IRQ12)            W3             Open

      On board mouse enabled (IRQ12)             W3            Closed

  »   Parity enabled                             W4            Closed

      Parity disabled                            W4             Open

  »   Dallas clock normal operation              W5             Open

      Dallas clock discharge                     W5            Closed

  »   Parallel port mode unidirectional          W7          pins 1 & 2
                                                               closed

      Parallel port mode bidirectional           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 alter          W9             Open

  »   CPU type select 80486DX/DX2/Pentium        W12         pins 2 & 3
      Overdrive                                                closed

      CPU type select 80486SX                    W12         pins 1 & 2
                                                               closed

  »   PQFP CPU enabled                           W13         pins 1 & 2
                                                               closed

      PQFP CPU disabled                          W13         pins 2 & 3
                                                               closed

                           DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2        Bank 3

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

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

     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

     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

     28MB       (1) 1M x 36   (1) 1M x 36    (1) 1M x 36    (1) 4M x 36

     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

     52MB       (1) 1M x 36   (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     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

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

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

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

                 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.

            CACHE JUMPER CONFIGURATION (WRITE BACK)

        Size                  W16                  W17

        64KB           pins 1 & 2 closed    pins 1 & 2 closed

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

        256KB          pins 2 & 3 closed    pins 2 & 3 closed

  Note: If write through is selected, open jumpers W16 & W17.

             CPU SPEED CONFIGURATION

  Speed     SW1/1     SW1/2    SW1/3     SW1/4

  25MHz      Off       On       Off       Off

  33MHz      On        On       Off       Off

  50iMHz     Off       On       Off       Off

  66iMHz     On        On       Off       Off