ILON USA, INC.

M-423

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   20/25/33/50(internal)MHz
Chip Set          PC Chips
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  External battery           JP1      Power LED & keylock         JP20

  Reset switch              JP17      Speaker                     JP21

  Turbo LED                 JP18      Weitek 4167 connector        W1

  Turbo switch              JP19

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

  »   Gate type select fast A20               JP3           pins 1 & 2
                                                              closed

      Gate type select keyboard A20           JP3           pins 2 & 3
                                                              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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

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

         CACHE JUMPER WRITE-THROUGH CONFIGURATION

   Size      JP4       JP6      JP11      JP12     JP13

   32KB     2 & 3     2 & 3     2 & 3     2 & 3    2 & 3

   64KB     1 & 2     2 & 3     1 & 2     1 & 2    2 & 3

  128KB     1 & 2     1 & 2     1 & 2     1 & 2    1 & 2

  256KB     2 & 3     1 & 2     1 & 2     1 & 2    1 & 2

  Note: Pins designated should be in closed position.

         CACHE JUMPER WRITE-BACK CONFIGURATION

   Size        JP7        JP8         JP9       JP10

   32KB       1 & 2      2 & 3       2 & 3      2 & 3

   64KB       2 & 3      2 & 3       2 & 3      1 & 2

   128KB      2 & 3      2 & 3       1 & 2      2 & 3

   256KB      2 & 3      1 & 2       2 & 3      2 & 3

  Note: Pins designated should be in closed position.

                          CPU TYPE CONFIGURATION

       Type               JP14              JP15               JP16

      80486SX           pins 2 & 3          Open            pins 2 & 3
                         closed                               closed

      80487SX           pins 1 & 2        pins 2 & 3      pins 1 & 2, 3 &
                         closed            closed            4 closed

      80486DX           pins 1 & 2        pins 1 & 2      pins 1 & 2, 3 &
                         closed            closed            4 closed

     80486DX2           pins 1 & 2        pins 2 & 3      pins 1 & 2, 3 &
                         closed            closed            4 closed

         CPU SPEED CONFIGURATION

        Speed                JP5

        20MHz         pins 1 & 2 closed

        25MHz         pins 2 & 3 closed

        33MHz         pins 1 & 2 closed

       50iMHz         pins 2 & 3 closed