MICRONICS COMPUTERS, INC.

80486-25 ISA

Processor         80486DX
Processor Speed   25MHz
Chip Set          Micronics
Max. Onboard DRAM 16MB
Cache             64/128/256KB
BIOS              Phoenix
Dimensions        350mm x 304mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J2       Reset switch               W4

  Speaker                     J22       Turbo LED                  W5

  Power LED & keylock         J23       Turbo switch               W6

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

  »   Internal cache enabled                 SW1/1               On

      Internal cache disabled                SW1/1              Off

  »   BIOS select onboard                    SW1/2              Off

      BIOS select external                   SW1/2               On

  »   Factory configured - do not            SW1/3               On
      alter

  »   Secondary cache enabled                SW1/4               On

      Secondary cache disabled               SW1/4              Off

  »   Video BIOS shadowing disabled          SW1/5              Off

      Video BIOS shadowing enabled           SW1/5               On

  »   Factory configured - do not            SW1/6              Off
      alter

  »   Monitor type select color              SW1/7               On

      Monitor type select                    SW1/7              Off
      monochrome

  »   Factory configured - do not            SW1/8              Off
      alter

  »   Factory configured - do not            SW2/5              Off
      alter

  »   Address range 14MB to 15MB             SW2/6              Off
      cacheable

      Address range 13MB to 15MB             SW2/6               On
      Non-cacheable

  »   Factory configured - do not             W1             pins 1 & 2
      alter                                                    closed

  »   Factory configured - do not             W2             pins 2 & 3
      alter                                                    closed

  »   Video BIOS caching enabled              W3                Open

      Video BIOS caching disabled             W3               Closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9      NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9      NONE           NONE

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      NONE

     4MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9  (4) 256K x 9

     4MB        (4) 1M x 9        NONE           NONE           NONE

     5MB        (4) 256K x 9   (4) 1M x 9        NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        NONE

     7MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9   (4) 1M x 9

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9   (4) 1M x 9     (4) 1M x 9        NONE

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        NONE

     13MB       (4) 256K x 9   (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

         DRAM SWITCH CONFIGURATION

  Size     SW2/1   SW2/2    SW2/3    SW2/4

   1MB      On       On       On       On

   2MB      Off      On       On       On

   3MB      On      Off       On       On

   4MB      Off     Off       On       On

   4MB      On       On      Off       On

   5MB      On       On      Off      Off

   6MB      On      Off       On      Off

   7MB      Off      On       On      Off

   8MB      Off      On      Off       On

   9MB      On      Off      Off      Off

  10MB      Off     Off       On      Off

  12MB      On      Off      Off       On

  13MB      Off     Off      Off      Off

  16MB      Off     Off      Off       On

            CACHE CONFIGURATION

     Size          Bank 0        Bank 1

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

     128KB       (4) 32K x 8      NONE

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

                        CACHE JUMPER CONFIGURATION

     Size         SW2/7         SW2/8           W8               W9

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

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

    256KB          Off           On          pins 2 & 3      pins 2 & 3
                                              closed           closed