
MICRONICS COMPUTERS, INC.

JX30Gc VL-BUS

Processor     80486SX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor     25/33/50(internal)/66(internal)/100(internal)MHz
Speed
Chip Set      Micronics
Max. Onboard  64MB
DRAM
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 (2), parallel port, serial ports (2)
NPU Options   None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J8       Power LED & keylock        J31

  Serial port 2               J9       IDE interface -            J32
                                       secondary

  External keyboard          J13       32-bit VESA Local bus    S1 & S2
                                       slots

  Serial port 1              J14       Turbo LED                  W18

  Parallel port              J16       Turbo switch               W19

  IDE interface -            J26       Reset switch               W20
  primary

  Floppy drive interface     J27       IDE interface LED          W21

  Speaker                    J30

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

     Factory configured - do not           SW1/3               Off
      alter

     Factory configured - do not           SW1/4               Off
      alter

     Real time clock installed              W1               Closed

      Real time clock not                    W1                Open
      installed

     Monitor type select color              W2               Closed

      Monitor type select                    W2                Open
      monochrome

     Factory configured - do not            W3                Open
      alter

     Parity enabled                         W4               Closed

      Parity disabled                        W4                Open

     CMOS memory normal operation           W5                Open

      CMOS memory clear                      W5               Closed

     Normal operation                       W8              pins 2 & 3
                                                              closed

      BIOS recovery enabled                  W8              pins 1 & 2
                                                              closed

     Primary IDE (J26) enabled              W34             pins 1 & 2
                                                              closed

      Primary IDE (J26) disabled             W34             pins 2 & 3
                                                              closed

     Parallel port select IRQ7              W36             pins 1 & 2
                                                              closed

      Parallel port select IRQ5              W36             pins 2 & 3
                                                              closed

                            CACHE CONFIGURATION

     Size          Bank 0        Bank 1         TAG           TAG/U61

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

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

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

                            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

                    CPU TYPE CONFIGURATION

        Type                  W12                  W13

       80486SX         pins 1 & 2 closed    pins 2 & 3 closed

       80486DX         pins 2 & 3 closed    pins 2 & 3 closed

      804896DX2        pins 2 & 3 closed    pins 2 & 3 closed

  Pentium Overdrive    pins 2 & 3 closed    pins 1 & 2 closed

    CPU SPEED CONFIGURATION

   Speed     SW1/1      SW1/2

   25MHz      Off        On

   33MHz       On        On

  50iMHz      Off        On

  66iMHz       On        On

  75iMHz      Off        On

  100iMHz      On        On

                    PARALLEL PORT CHANNEL CONFIGURATION

         Channel                    W37                      W38

            NONE                   Open                    Open

             DMA1            pins 1 & 2 closed        pins 1 & 2 closed

             DMA3            pins 2 & 3 closed        pins 2 & 3 closed

                    SECONDARY IDE CHANNEL CONFIGURATION

         Channel                    W39                      W40

            NONE                   Open                    Open

             DMA6            pins 1 & 2 closed        pins 1 & 2 closed

             DMA7            pins 2 & 3 closed        pins 2 & 3 closed

