AIM MOTHERBOARD COMPANY

AIM486CQ

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          VLSI
Max. onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            JP5      Reset switch               JP32

  Turbo switch               JP30      Speaker                    JP33

  Turbo LED                  JP31      Power LED & keylock        JP34

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Monitor type select color              JP1               Closed

      Monitor type select                    JP1                Open
      monochrome

  »   CMOS memory normal operation           JP6             pins 1 & 2
                                                               closed

      CMOS memory clear                      JP6             pins 2 & 3
                                                               closed

  »   NPU select 0 wait states              JP18                Open

      NPU select 1 wait state               JP18               Closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      20MB        (4) 1M x 9      (4) 4M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

                        CACHE JUMPER CONFIGURATION

   Size       JP11       JP12     JP13       JP14       JP40       JP41

   64KB       Open       Open     Open       Open       Open       pins 2
                                                                    & 3

   128KB      Open      pins 1    pins 2    Closed      Open       pins 1
                         & 2       & 3                              & 2

   256KB     Closed     pins 1    pins 1    Closed     Closed      pins 2
                         & 2       & 2                              & 3

  Note:Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

      Speed              JP15               JP22               JP23

      20MHz           pins 2 & 3            Open               Open
                        closed

      25MHz           pins 1 & 2           Closed              Open
                        closed

      33MHz           pins 1 & 2            Open              Closed
                        closed

      50MHz           pins 1 & 2           Closed             Closed
                        closed

                          CPU TYPE CONFIGURATION

     TYPE            JP2            JP3            JP7           JP8

    80486SX         Open         pins 2 & 3       Open          Closed
                                   closed

    80487SX       pins 1 & 2     pins 1 & 2      Closed          Open
                   closed          closed

    80486DX       pins 2 & 3     pins 2 & 3       Open          Closed
                   closed          closed