ADVANCED INTEGRATION RESEARCH, INC.

486LC

Processor         80486DX
Processor Speed   25/33MHz
Chip Set          UMC
Max. Onboard DRAM 16MB
Cache             128/256KB
BIOS              AMI/Award/Phoenix
Dimensions        355mm x 304mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Turbo LED                   J6

  Speaker                     J4       External 6V battery         JB2

  Reset switch                J5

  Note:No internal battery is provided, an external battery must be used.

                        USER CONFIGURABLE SETTINGS

               Function                   Jumper/Switch       Position

  »   CPU speed select high                     J3            pins 1 & 2
                                                               closed

      CPU speed select low                      J3            pins 2 & 3
                                                               closed

  »   Factory configured - do not             SW1/1              N/A
      alter

  »   UNIX operating system not               SW1/2              Off
      installed

      UNIX operating system installed         SW1/2              On

  »   External cache memory disabled          SW1/3              Off

      External cache memory enabled           SW1/3              On

  »   Memory range 00C00000-00FFFFFF          SW1/4              Off
      (12-16MB) cacheable

      Memory range 00C00000-00FFFFFF          SW1/4              On
      (12-16MB) non-cacheable

  »   Monitor type select color               SW1/5              On

      Monitor type select monochrome          SW1/5              Off

  »   Onboard DRAM enabled                    SW1/6              On

      Onboard DRAM disabled                   SW1/6              Off

                            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

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

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

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

                         DRAM JUMPER CONFIGURATION

      Size              JP1                JP2                 JP3

      1MB            pins 1 & 2         pins 1 & 2      pins 1 & 2 closed
                      closed              closed

      2MB            pins 2 & 3         pins 1 & 2      pins 1 & 2 closed
                      closed              closed

      3MB            pins 1 & 2         pins 2 & 3      pins 1 & 2 closed
                      closed              closed

      4MB            pins 2 & 3         pins 2 & 3      pins 1 & 2 closed
                      closed              closed

      4MB            pins 1 & 2         pins 1 & 2      pins 2 & 3 closed
                      closed              closed

      8MB            pins 2 & 3         pins 1 & 2      pins 2 & 3 closed
                      closed              closed

      12MB           pins 1 & 2         pins 2 & 3      pins 2 & 3 closed
                      closed              closed

      16MB           pins 2 & 3         pins 2 & 3      pins 2 & 3 closed
                      closed              closed

                            CACHE CONFIGURATION

          Size                    Bank 0                   Bank 1

          128KB                (4) 32K x 8                  NONE

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

  Note:Model 486LC may be equipped with 4 DIP sockets for a maximum of
  128KB cache.

            MEMORY CHIP SPEED JUMPER CONFIGURATION

        25MHz               33MHz                 JP4

        80ns                 60ns          pins 1 & 2 closed

        100ns                80ns          pins 2 & 3 closed

                      BIOS CONFIGURATION

        Size                 JB1                 SW1/7

        27256          pins 1 & 2 closed          Off

        27512          pins 2 & 3 closed           On