
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

