MICRONICS COMPUTERS, INC.

NON-ZIF SOCKET SYSTEM BOARD

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 (on external cache card)
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       External cache card, 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

  Serial port 1             J11       IDE interface               J30
                                      (secondary)

  Parallel port             J12       32-bit VESA Local bus    SL1 & SL2
                                      slots

  Serial port 2             J14       External cache card         SL3
                                      slot

  Floppy drive              J15       Reset switch                W15
  interface

  IDE interface             J16       Turbo LED                   W17
  (primary)

  External battery          J24       Turbo switch                W18

  Speaker                   J28       IDE interface LED           W19

  Power LED & keylock       J29

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CPU type select 80486DX/DX2              W13           pins 1 & 2
                                                              closed

      CPU type select 80486SX                  W13           pins 2 & 3
                                                              closed

  »   Parallel port mode select output         W16           pins 2 & 3
      (printer)                                               closed

      Parallel port mode select input          W16           pins 1 & 2
      (scanner)                                               closed

  »   Flash BIOS write protect enabled         W20           pins 2 & 3
                                                              closed

  »   Flash BIOS write protect disabled        W20           pins 1 & 2
                                                              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

                         DRAM SWITCH CONFIGURATION

     Size          SW8/1          SW8/2         SW8/3           SW8/4

     4MB            On             On             On             On

     8MB            Off            On             On             On

     12MB           On             Off            On             On

     16MB           Off            Off            On             On

     16MB           On             On            Off             On

     20MB           On             On            Off             Off

     24MB           On             Off            On             Off

     28MB           Off            On             On             Off

     32MB           Off            On            Off             On

     36MB           On             Off           Off             Off

     40MB           Off            Off            On             Off

     48MB           On             Off           Off             On

     52MB           Off            Off           Off             Off

     64MB           Off            Off           Off             On

  Note:This table corresponds exactly to the above DRAM configuration
  table.

             CPU SPEED CONFIGURATION

  Speed     SW8/5     SW8/6    SW8/7     SW8/8

  25MHz      On        Off       On       Off

  33MHz      Off       On       Off       Off

  50iMHz     On        Off       On       Off

  66iMHz     Off       On       Off       Off